Honda BH6575 Backhoe User Manual

INTRODUCTION

Thank you for purchasing a BH6575 Backhoe attachment for your Honda H6522 A4 Compact Tractor

equipped with a

H6555 Front Loader. We want

to

help you get the best results from your new backhoe

and to operate it safely.

This manual covers the assembly, operation, and maintenance of the

BH6575 Backhoe. For your

convenience, a parts guide and warranty information are also included in this publication.

The illustrations in this manual are intended to serve as a reference and may not necessarily depict the

actual model listed above. The information in this publication is based on the latest product information

available at the time of printing. American Honda Motor Co., Inc. reserves the right to make changes at

any time without notice and without incurring any obligation.

This manual is a permanent part of the backhoe and must remain with the backhoe

if

resold.

No part of this publication may be reproduced without written permission.

SAFETY MESSAGES

Your safety and the safety of others are very important. We have provided important safety messages

in this manual and on the backhoe. Please read these messages carefully.

A safety message alerts you to potential hazards that could hurt you or others. Each safety message is

preceded by a safety alert symbol

A

and one

of

three words: DANGER, WARNING, or CAUTION.

These mean:

!

DL

You WILL be KILLED or SERIOUSLY HURT if you don’t follow instructions.

1-

You can be KILLED or SERIOUSLY HURT if you don’t follow instructions.

?A

0

You

can be HURT if you don’t follow instructions.

Each message tells you what the hazard is, what can happen, and what you can do to avoid or reduce

injury.

DAMAGE PREVENTION MESSAGES

You will also see other important messages that are preceded by the word NOTICE.

This word means:

-1

Your

backhoe

or

other property can be damaged if you don’t follow instructions.

The purpose of these messages is

to

help prevent damage to your backhoe, other property, or the

environment.

The Honda

BH6575 Backhoe attachment is designed

to

give safe and dependable service

if

assembled

and operated according to instructions.

If

a problem should arise, or

if

you have any questions about your backhoe, consult an authorized

Honda compact tractor dealer.

1

ATF

....

AutomaticTransmission

Fluid

CV

.......... Constant Velocity

F

....................

Female

GA

..................

Gauge

GR

(5,

etc.)

......

Grade

(5,

etc.)

NF

............. National Fine

UNF

.............

Unified Fine

PTO

..........

Power Take

Off

kg

.................

.Kilogram

ID

...........

Inside Dimension

INTRODUCTION

The chart below lists common abbreviations used throughout this

manual.

ABBREVIATIONS

P

......................

Pitch mm

................

Millimeter

M

......................

Male psi

.....

Pounds per Square Inch

Engineers

N

.................. .Newton UNC

..........

.Unified Coarse

NC

...........

National Coarse NPSM

....

National Pipe Straight

Mechanical

HT

.............

Heat Treated UNS

..........

.Unified Special

m

....................

Meter NPT

......

.National Pipe Thread

ASTM

...... American Society fo

Ib.

...................

Pound

Testing

&

Materials

R

....................

.Right

L

.......................

left

OD

........

.Outside Dimension

NOTES

MPa

............

.Mega Pascal SAE

......

Society of Automotive

2

TABLE

OF

CONTENTS

TABLE

OF

CONTENTS

INTRODUCTION

......................

1

ACCIDENT PREVENTION

................

5

GENERAL INFORMATION

................

6

SAFETY LABELS

.....................

7

SAFETY RULES

......................

9

ASSEMBLY INSTRUCTIONS

..............

11

OPERATION

.......................

26

TROUBLESHOOTING

..................

34

SERVICE

&

MAINTENANCE INSTRUCTIONS

.....

35

PLUMBING SCHEMATIC

................

50

SPECIFICATIONS

....................

52

INDEX TO PARTS LIST

.................

55

WARRANTY

.......................

71

3

TABLE OF CONTENTS

GENERAL SAFETY INFORMATION

TO THE OWNER:

Read this manual before using your backhoe. The information presented will prepare you to do

a

better

and safer job. Keep this manual handy for ready reference. Study this manual carefully and become

acquainted with all the adjustments and operating procedures before attempting to operate your new

equipment.

The Honda

BH6575 Backhoe attachment

is

designed only for sub

-

frame mounting to

a

Honda H6522

Compact Tractor equipped with a H6555 Front Loader. It is not to be modified

or

mounted in any other

configuration.

The backhoe you have purchased has been carefully engineered and manufactured to provide

dependable and satisfactory use. Like all mechanical products,

it

will require cleaning and upkeep.

Lubricate the backhoe as specified. Observe all safety information in this manual and safety labels

on

the backhoe and tractor.

For service, your authorized Honda compact tractor dealer has trained mechanics, genuine Honda

service parts, and the necessary tools and equipment to handle all your needs.

Use only genuine Honda service parts. Substitute parts may not meet standards required

for

safe and

satisfactory operation. Record the model and serial number of your backhoe (Figure

1):

Model:

Serial Number:

Provide this information to your dealer to obtain correct repair parts.

1

Figure

1.

Model and Serial Number Location

4

ACCIDENT PREVENTION

Accidents Can

Be

Prevented

With

Your

Help

No

accident prevention program can be successful without the wholehearted cooperation of the person

who is directly responsible for the operation of equipment.

A

large number of accidents can be prevented only by the operator anticipating the result before the

accident is caused and doing something about it.

No

power

-

driven equipment, whether it be

transportation

or

processing, whether it be on the highway,

in

the harvest field or in the industrial plant,

can be safer than the person who is at the controls. Accidents can be prevented by operators who

accept

a

full measure of their responsibility.

It is true that the designer, the manufacturer, the safety engineer can help, but their combined efforts

can be erased by a single careless act

of

the operator.

The best kind of

a

safety device is a careful operator. We ask you to be that kind of an operator.

5

GENERAL INFORMATION

The purpose of this manual is to assist in setting

up, operating and maintaining your backhoe. Read

it carefully. It furnishes information and instructions

that will help you achieve years of dependable

performance.

These instructions have been compiled from

extensive

field

experience and engineering data.

Some information may be general in nature due to

unknown and varying conditions. However,

through experience and these instructions, you

should be able to develop procedures suitable to

your particular situation.

The illustrations and data used in this manuatwere

current at the time of printing, but due to possible

in line production changes, your machine may vary

slightly in detail. We reserve the right to redesign

and change the machines as may be necessary

without notification.

-

FORWARD

Some illustrations in this manual show the backhoe

with safety shields

or

other components removed

to provide a better view.

Operating the

backhoe

with

safety

shields

or

any components removed

could cause serious injury.

The

backhoe

should never

be

operated with any

safety

shielding

or

components removed.

Throughout this manual, references are made to

right, left, forward and rearward directions. These

are determined from the backhoe operator seat

position facing forward as shown in .Figure

2.

Nomenclature for backhoe components have

some variations throughout the industry. We use

SAE

designations as shown in Figure

2.

1.

Bucket

2.

Bucket cylinder

3.

Dipperstick cylinder

4.

Boom cylinder

5.

Console

6.

Stabilizer

7.

Swing cylinder

8.

Boom

9.

Dipperstick

10.

Stabilizer cylinder

11.

Swing Frame

12.

Main Frame

13.

Sub

-

frame assembly

Figure

2.

Backhoe Nomenclature

6

I

-*

SAFETY

,

SAFETY LABEL LOCATIONS

(Figure

3)

Read all safety instructions before operating the BH6575 Backhoe. Anyone who uses the backhoe

should read and understand this information before operating the backhoe. Refer to the

H6522 Owner’s

Manual and

H6555 Front Loader Operator’s Manual

for

additional safety label information before

operating the backhoe.

The safety labels should be considered as permanent parts of the backhoe.

If

a safety label comes

off

or becomes hard to read, contact an authorized Honda compact tractor dealer for replacements.

1.

Warning Label

2.

Danger Label

3.

Lock

Label

Figure

3.

Safety Label Locations

a

1

TO

AVOID

SERIOUS

INJURY

OR

DEATH,

READ OPERATOR’S MANUAL AND FOLLOW ALL

KEEP HANDS AND BODY AWAY FROM

SAFETY, OPERATING AND SERVICE INSTRUCTIONS

HIGH

-

PRESSURE LINES. IF OIL, UNDER PRESSURE,

(CONTACT DEALER FOR MANUAL.) PENETRATES THE SKIN,

IT

MUST BE SURGICALLY

ENSURE

ALL

SAFETY SHIELDS AND DECALS ARE

REMOVED WITHIN A FEW HOURS BY A DOCTOR

INSTALLED AND IN GOOD CONDITION.

FAMlLlARWITHTHISFORMOFlNJURYORGANGRENE

MAY RESULT.

DO NOT ALLOW CHILDREN

OR

UNQUALIFIED

CONSULT LOCAL UTILITIES BEFORE DIGGING. KNOW

PERSONSTOOPERATE EQUIPMENT.

LOCATION OF AND AVOID CONTACTING ALL

A MINIMUM

25%

OF TRACTOR AND EQUIPMENT

WEIGHTMUSTBEONTRACTORFRONTWHEELSWITH

UNDERGROUND CABLES, PIPELINES, OVERHEAD

WIRES AND OTHER HAZARDS IN DIGGING AREA.

BACKHOE IN TRANSPORT POSITION. NO RIDERS ARE ALLOWED ON TRACTOR

OR

WHEN OPERATING, ALWAYS SIT IN BACKHOE SEAT;

KEEP BYSTANDERS AWAY FROM OPERATOR, BEFORE TRANSPORTING, ATTACH SLOW MOVING

STABILERAND MAXIMUM BUCKET SWING AREAS. VEHICLE (SMV) SIGN AND ENGAGE TRANSPORT

OPERATE PTO AT

540

RPM

MAX.

BACKHOE.

LOCKS.

BACKHOE DIGGING FORCES CAN

LIFT AND TURN

TRACTOR OVER. MAKE SURE STABILIZER PADS ARE

ON FIRM GROUND AND AVOID

SOFT

OR

STEEP

BANKS.

BEFORE LEAVING EQUIPMENT UNATTENDED. RAISE

BOOMANDlNSTALLTRANSPORTLOCKS.0lSENGAGE

PTO, RELIEVE PRESSURE ON DIPPERSTICK AND

BUCKET. SHUT ENGINE OFF AND REMOVE KEY.

.-

I

SAFETY

2

I

151

CRUSHING

HAZARD

I

FULURE

TO

RXLOW THESE

STEPS

YAY

RESULT

IN

SERIDUB

INJURY

OR

DEATH

FROM MCKHOE BEING THRUST UPWARD. FORWARD

OR

REARWARD

BYWINOFORCES.

I

H

ONLY OPERATE WHEN MANUFACTURERS SUBFRAME AND FRONT

-

END

LOADER HAVE BEEN INSTALLED AND AWUSTED. AND

OPEIUTOWS

AREA

(SHOWN SHADED1

IS

FREE FROM OBSTRUCTIONS IN

A

UT

RAMUS

FROM

I

THESUTTOAPOlNT((rBEHlNDTHESUT

H

NEVER MOUNT BACKHOE TO

A

TRACTOR

%POINT

HITCH.

THE

9

POINT

HITCH

WILL

ROTATE

AND CAUSE

SERIOUS

INJURY

OR

DEATH.

I

H

FOW

BACKHOE AND SUBFRAME OPERATORS MANUAL MOUNTING

H

WLY MOUNT BACKHOE AND SUBFRUIE

TO

TRACTORS

WmC FRONT

INSTRUCTIONS. (CONTACT

A

HONM

DEALER

K)R

MANUAL)

WADERS

AS

SPECIFIED

IN

MANUAL

ONLY USE MANUFACTURERS HEAVY

-

DUTY TOP LINK AND

HIGHSTRENGTH TOP

UNK

PIN.

H

DONOTMODlMORSUBST~UTEANYPARTOF8*CKHOE.SUB.FRIMEOR

MOUNTING

HARDWARE.

8

I

-

SAFETY

SAFETY INFORMATION

Safety is a primary concern in the design and

manufacture of our products. Unfortunately, our

efforts

to

provide safe equipment can be erased by

a single careless act of an operator.

In addition to the design and configuration of

equipment, hazard control and accident prevention

are dependent upon the awareness, concern,

prudence and proper training of personnel involved

in the operation, transport, maintenance and

storage

of

equipment.

The best safety device is an informed, careful

operator. We ask you to be that kind of an operator.

The designed and tested safety of this equipment

depends on

it

being operated within the limitations

as explained in this manual.

TRAINING

Safety instructions are important! Read this

manual, the tractor manual and

all

safety

rules.

0

Know your controls and how to stop tractor

engine and backhoe quickly in an

emergency.

0

Operators must be instructed in and

be

capable of the safe operation of the

equipment, its attachments and all

controls.

Do

not allow anyone to operate

thisequipmentwithout proper instructions.

0

Keep hands and body away from

pressurized lines. Use paper

or

cardboard,

not body parts to check for leaks. Hydraulic

fluid (oil) under pressure will penetrate skin

causing serious injury.

0

Make sure that

ail

operating and service

personnel know that in the event hydraulic

fluid penetrates skin,

It must be surgically

removed within a few hours by a doctor

familiar with this form of injury, or gangrene

may result.

0

Do not allow children or unqualified

persons to operate equipment.

PREPARATION

0

The BH6575 Backhoe should only be used

with the Honda

H6522

A4

(4

-

wheel drive)

Compact Tractor.

0

Always wear relatively tight and belted

clothing to avoid entanglement in moving

parts. Wear sturdy, rough

-

soled work

shoes and protective equipment for eyes,

hands, hearing and head.

0

Never operate unless backhoe’s sub

-

frame

has been installed and properly mounted to

a

Honda H6522

A4

Compact Tractor

equipped with a

FL6555 Front Loader.

Do not operate backhoe unless there

Is

adequate operator clearance as shown on

safety label. (Refer to Danger Label on page

8.)

0

Always use special heavy

-

duty top link

(provided with backhoe) and original

equipment high

-

strength top link pin

(provided with tractor) to mount top link to

tractor. Use pin provided with backhoe to

mount top link to backhoe.

Ensure that backhoe is properly mounted,

adjusted and in good operating condition.

0

Ensure

all

safety labels are installed and in

good condition. (See page

7

illustrations.)

Ensure shields and guards are properly

installed and in good condition.

0

A

minimum 25% of tractor and equipment

weight must be on tractor front wheels with

backhoe in transport position. Without this

weight, the tractor could tip over causing

personal Injury or death. The weight must

be attained with a

FL6555 Front Loader,

fluid

In

the rear wheels and possibly rear

wheel weights depending on the type of

rear tire.

Ag tires

-

99

Ib (45 kg) ballast

In

each rear

tire and 75 Ib

(31.8

kg) wheel weight on each

rear wheel.

Turf or High Flotation Tires

-

170

Ib

(77

kg)

ballast

in

each rear tire.

Weigh the tractor and equipment.

Do

not

estimate.

9

~~

0

Make sure that the hydraulic pump

PTO

spring activated locking pin slides freely

and

Is seated firmly in the tractor

PTO

spline groove.

0

Before working on backhoe, extend boom

and dipperstick and place bucket on

ground. Make sure that ail system pressure

has been relieved by operating controls

before maintenance, service or

disconnecting any hydraulic lines.

Hydraulic system

leak down and failure of

mechanical or hydraulic system can cause

equipment to drop.

0

Clean all dirt, trash and grease from

operator’s platform and steps.

OPERATIONAL SAFETY

0

Consult local utilities before digging. Know

location of and avoid contacting all

underground cables, pipelines, overhead

wires and other hazards

in

digging area.

0

Keep bystanders away from operator,

stabilizer and maximum bucket swing

areas.

Operate only In daylight or good artificial

light.

0

When transporting, you must wear a seat

belt

if

your tractor

Is

equipped with a

ROPS.

0

Always comply with all state and local

lighting and marking requirements.

0

No

riders are allowed on tractor or backhoe.

0

When Operating controls, always sit in

backhoe seat.

c]

Disengage Power Take

Off

(PTO),

shift

tractor into neutral or park, and place all

controls

In

neutral before starting tractor

engine.

0

Operate tractor

PTO

at

540

rpm.

0

Always dump spoll at least

two

feet away

0

Always provide a means to exit from trench

0

Use extreme care when working close to

from opening.

If

It

is

25

feet or longer.

fences, ditches or on hillsides.

0

Be careful when swinging loaded bucket on

a hillside; always dump spoll on uphill side

of backhoe to

minimize upset possibility.

0

Always engage swing and boom transport

locks and attach Slow Moving Vehicle

(SMV)

sign before transporting backhoe.

0

Never leave equipment unattended with

engine running or with bucket

In

raised

position. Always rest bucket on ground and

remove

Ignition key before leaving tractor.

0

Do

not use backhoe for craning;

It

Is

designed for digging.

MAINTENANCE SAFETY

0

Always wear relatively tight and belted

clothing to avoid entanglement

in

moving

parts. Wear sturdy, rough

-

soled work

shoes and protective equipment for eyes,

hands, hearing and head.

c]

Never perform service or maintenance with

tractor engine running.

Before working on backhoe, extend boom

and dipperstick and place bucket on

ground. Make sure that all system pressure

has been relieved by Operating controls

before maintenance, service or

disconnecting any hydraulic lines.

Hydraulic system leak down and failure

of

mechanical or hydraulic system can cause

equipment to drop.

0

Keep all persons away from operator

control area while

performing adjustments,

service or maintenance.

0

Tighten all bolts, nuts and screws, and

check that all cotter pins are Installed

securely to ensure backhoe

Is

In

a safe

condition before operating.

0

Ensure all safety labels are installed and

in

good condition. (See page

7

Illustration.)

0

Ensure shields and guards are properly

installed and in good condition.

STORAGE

0

Refer to Removing and Storing Backhoe on

page

33.

10

.

..~..,<<

ASSEMBLY INSTRUCTIONS

PROPER TORQUE FOR

FASTENERS

TORQUE SPECIFICATIONS (AMERICAN)

Proper torque for American fasteners used on Honda equipment.

Recommended Torque in Foot Pounds (Newton Meters).

WRENCH

GRADE

8

GRADE

5

GRADE

2

DIAMETER

SIZE (IN.)

SAE

SAE SAE

BOLT

“A”

THREAD SIZE

(IN.)

“8”

AND

7/16

12 (16)

8(11)

6 (7)

1/4

-

20 UNC

711 6

14 (18)

8

(1 3) 6

(8)

1/4

-

28 UNF

112

25 (33)

17 (23)

11 (15)

5/16

-

18 UNC

1/2

27 (37)

19 (26) 13 (1 7)

511 6

-

24 UNF

The chart lists

the

correct tightening torque

for fasteners used on the Honda

BH6575

backhoe. When

bolts

are

to

be tightened or

replaced, refer to this chart

to

determine the

grade of

bolts

and the proper torque except

when specific torque values are assigned in

manual text.

Bolt

Head Markings

911 6

44

(60)

31 (42)

20

(27)

3/8

-

20 UNC

911

6

49 (66)

35 (47)

23 (31)

3/8

-

24 UNF

TORQUE SPECIFICATIONS (METRIC)

Proper torque for Metric fasteners used on Honda equipment.

Recommended Torque in

Foot

Pounds (Newton Meter).

WRENCH

CLASS CLASS

DIAMETER

SlZE(mm)

ASTM ASTM

ASTM ASTM BOLT

‘SAW

(mm) UBlS

4.6

10.9

9.8

8.8

8

11.1 (15) 8.7(12)

3

(4)

6 10

6.5

(8.8)

5.1 (6.9)

1.8 (2.4)

5

12

21.1 (29)

1

27

(37)

7.3 (1

0)

8

14

42 (57)

I

53 (72) 14.5 (20)

10

I

I I

I

11

ASSEMBLY INSTRUCTIONS

GENERAL ASSEMBLY

INSTRUCTIONS

Backhoe assembly is the responsibility of the

Honda Power Equipment Compact Tractor Dealer.

The backhoe should be delivered to the owner

completely assembled, lubricated and adjusted for

normal operating conditions.

Set up with these instructions and illustrations.

!

BA

When finished with

assembly, complete the following check

lists.

Failure

to

complete

all

checklists could cause

serious injury

or

death

to

the operator.

Pre-Deliveiy Check List

Inspect the backhoe thoroughly after assembly

to

be certain it is set up properly before delivering

it

to the customer. The check lists are a reminder of

points to inspect. Check

off

each item as it is found

satisfactory or after proper adjustments are made.

Check all bolts to be sure they are tight.

c]

Check that all lubrication points have been

lubricated.

c]

Check that all cotter pins and safety pins are

properly installed.

Check that the 'backhoe and sub

-

frame are

properly attached to tractor and front end

loader sub

-

frame.

c]

Check that

all

adjustments have been made.

c]

Check that hydraulic reservoir has been

serviced and that hydraulic system and all

functions have been operated through full

cylinder stroke to purge air from system.

0

Make sure

all

hydraulic fittings are tight and

there are no leaks in hydraulic system.

0

Refer to the safety instructions on pages

9

and

10

before checking for hydraulic leaks.

Delivery Check List

c]

Show customer how to make adjustments.

c]

Explain importance

of

lubrication and show

lubrication points to customer.

c]

Give Operator's Manual to customer and

recommend that all operators become familiar

with all sections and especially the safety

information.

Daily Check List

Check that the backhoe and .sub-frame are

properly and securely attached to the tractor

and front end loader sub

-

frame.

During inspection, check that all nuts and bolts

are secure and clevis pins are properly cotter

pinned.

0

Check for hydraulic leaks, frayed or worn hoses

and general safety of hydraulic system.

Refer

to

the safety

Instructions

on

page

9

and

10

before checking

for hydraulic leaks.

12

ASSEMBLY INSTRUCTIONS

DEALER SET

-

UP INSTRUCTIONS

The backhoe is shipped partially assembled.

Assembly will be easier

if

components are aligned

and loosely assembled before tightening

hardware.

Recommended torque values for hardware are

given on page

11.

vr

e

Always wear relatively tight

and

belted clothing to avoid entanglement in

moving parts. Wear sturdy, rough

-

soled work

shoes and protective equipment for eyes,

hands, hearing and head.

-

I

-

Keep all persons away from

operator control area while performing

adjustments, service or maintenance.

Keep hands and body away

from pressurized lines. Use paper or

cardboard, not body parts to check for

leaks.

Hydraulic fluid (oil) under pressure will

penetrate skin causing serious Injury.

3

Make sure that all operating

and service personnel know that In the event

hydraulic fluid penetrates skin, it must be

surgically removed within a few hours by

a

doctor familiar with this form of injury, or

gangrene may result.

SHIPPING PALLET PREPARATION

1.

Position backhoe on pallet in an assembly

area. Support unit with

a

chain hoist from lift lug

(3),

Figure

4,

to provide stability.

2.

Remove the seat assembly from the backhoe.

3.

Remove

all

bands, tie straps

and

steel wire

(2)

from backhoe components. Set the following

components

off

the pallet for installation later.

Sub

-

frame assembly

(set

plate assembly,

cross member and upper link are

attached to the sub

-

frame).

Bucket

Right Stabilizer assembly

1.

Shipping bar

5.

Bucket

2.

Shipping bands

6.

Sub

-

frame assembly

4.

Right

stabilizer

8.

Shipping angles

Figure

4.

Backhoe

in

Shipping Configuration

3.

Lift

lug

7.

Seat assembly

13

-

~ ~~~~

~~

ASSEMBLY

INSTRUCTIONS

Pallet Parts

1 Crossmember

Assy.

1 Pin, 19

x

397.mm

1 Klik Pin, 1/4

x

1-3/4"

1 Upper Link

Assy.

1 Right Stabilizer

Assy.

1 Bucket

1 Sub

-

Frame

assy.

4. Open the parts box and lay parts out to make

location easy. Refer to parts list and the

illustrations below.

14

"

x

18

"

Double

Burlap Bag

1 Breather Cap/dipstick

1 Elbow, 314 Hose 90'

1 Elbow, 7/8"-14

x

9/16"-18 90'

1 Fitting, 90'

2 Screw Hose Clamps

1 Pin,

1

.OO"

x 6.19

"

HT

1 Pivot Pin (boom)

1

2

1

2

1

Pivot Pin

\

Pivot Pins, 1

.O

x

7.25

"

WA

\

Clevis Pins, 1/4

x

1-718"

Clevis Pins, 1/16

x

1/2"

Control Handles

8

Grips (black)

Hex Lock Nuts,

1/2" NC

Bolts,

1/2NC

X

1-1/2" HHCS

GR

5

Reducer w/O-ring, 1.31

x

.88"

Reducer O

-

ring Boss

Pivot Pins Retaining Sleeve

Spiral Pins, 5/16

x

1 -3/4"

Swing Lock Pin

Safety Pin,

3/16"

0

@

Q

\

Burlap Bag

2 4

-

hole Backing Plates

2 2

-

hole Backing Plates

4 Bolts, 7/8

X

2-1/2" NC GR

5

8 Bolts, 1/2

X

1-3/4" NC

8 Bolts, 1/2

X

1-1/2" NC

4 Bolts, 12

x

80 mm

4 Bolts, 12

x

1.25P

x

35 mm

14

-,

ASSEMBLY INSTRUCTIONS

4

Bolts, 1/2

x

2

"

NC

4

Lock Nuts,

7/8"

NC

8

Lock Nuts, 1/2" NC

4 Lock Washers,

7/8"

32 Flat Washers, 1/2"

1 High strength Clevis Pin,

.

63

Q

0

\

3/4

X

3

-

1

14"

P

1 Safety Pin, 3/16

"

1 Backhoe Top Link Bolt,

3/4

X

3-1/2" NC

GR5

Loose

Parts

(Box)

1 Oil Filter Assy.

(in

box)

1

Pump Assy.

2

Bumper Pads

2

Crossmember

Mounting Brackets

1 Pump Mounting

Bracket

1 Hose, 3/4

ID

x

40

"

Q

15

ASSEMBLY

INSTRUCTIONS

Control Handle Installation

(Figure

5)

1.

Install both control handles.

Stabilizer Installation (Figure

5)

Right stabilizer (reference

7,

Figure

5)

on the

BH6575

backhoe is shipped banded.

2.

Slide a rubber grip over each control handle.

1.

Remove right stabilizer pin

(3)

and attach

stabilizer

(7).

2.

Remove bolt

(9)

from right stabilizer pad and

assemble cylinder rod end and pad to right

stabilizer.

1.

Control handle

6.

Stabilizer cylinder

2. Rubber

-

grip

7.

Stabilizer frame

3.

Right stabilizer pin

8.

Stabilizer pad

4.

Clevis pin

9.

Stabilizer

bolt,

3/4

NC

x

6

5.

Cotter pin

10.

Stabilizer pad nut,

314"

NC locknut

Figure

5.

Stabilizer Installation

I

16

ASSEMBLY

INSTRUCTIONS

'5

1.

Boom

7.

Bucket arm

13.

Bumper pad

2.

Dipperstick

8.

1

x

7-1/2"

Pivot

14.

1

x

6-1"'

Pivot

3.

Bucket

9.

1

x

4

-

7/8

Pivot

15. 1/4"

Flange locknut

4.

Retaining

sleeve

10. 1/4

x

1

-7/8"

Clevis

16. 1/4

x

3/4"

Bolt

5.

5/16

x

1

-3/4"

Spiral pin

11. 1/1

6

x

1/2"

Cotter

17.

Hose

clamp

6.

Rotating pivot pin

12.

Dipperstick cylinder

18.

Hydraulic

hose

routing

Figure

6.

Dipperstick

&

Bucket Assembly

4.

Bucket

&

Dipperstick

Installation

(Figure

6)

1. Remove shipping bar and attaching hardware

(Figure

4,

reference

1).

2.

Align dipperstick

(2)

with boom (1). Join them

with pivot pin

(8).

Line up the pivot pin hole with

hole in pivot bushing and secure with clevis pin

(1

0)

and cotter pin (1 1).

3.

Disconnect bucket hydraulic cylinder base end

where it attaches to the

,dipperstick. Route

bucket cylinder hoses through dipperstick

openings (1

8).

Make sure hoses are not

twisted. Install pivot pin

(9A) and secure with

clevis

(1

0)

and cotter pin

(1 1).

5.

Fasten the bucket rod end hose (orange mark)

with the clamp (17) on the right side of the

dipperstick as shown. Leave 16

"

of hose

toward the rod end fitting past the clamp. Snug

bolt

(16) and locknut (15) but do not torque

down. Fasten bucket base end hose (white

mark) with clamp on left side

of

the dipperstick,

leaving 16

"

of hose extending toward the base

end fitting past the clamp. Snug bolt (16) and

locknut (15) but do not torque down. When

backhoe is installed on tractor, operate

dipperstick through the entire range of

movement and check that hose length beyond

the clamp is sufficient. After completing check,

tighten both hose clamps.

Align dipperstick cylinder

(12)

with dipperstick

and install pivot pin

(9B). Line up pivot pin hole

with hole in pivot bushing. Secure with clevis

pin (10) and cotter pin (1 1).

6.

7.

8.

9.

Actuate swing control handle and move boom

and dipperstick to the centered position. Lower

dipperstickand align bucket and bucket arm (7)

and install rotating pivot pin

(6).

Secure with

retaining sleeve (4) and spiral pin

(5).

Align

bucket with dipperstick and secure with

retaining sleeve (4) and spiral pin

(5).

Lower

boom and dipperstick, resting bucket on

ground.

Remove lifting lug

(3), Figure 4, from boom and

install pivot pin

(14), Figure

6.

Line up pivot pin

hole with hole in pivot bushing. Secure with

clevis pin (1

0)

and cotter pin (1 1).

Install rotating pivot pins

(6)

and secure with

retaining sleeves (4) and spiral pins

(5).

Install bumper pads

(13)

to kingpost as shown.

Plumbing Installation (Figure

7.)

Keep hands and body from pressurized lines. Use

paper

or

cardboard, not body parts, to check for

leaks.

Hydraulic oil under

pressure will penetrate the skin causing

serious injury.

Make sure that all operating and service

personnel know that

In the event hydraulic fluid

penetrates skin,

It

must be surgically removed

within a few hours by a doctor familiar with this

form of injury, or gangrene may result.

To prevent damage to the

hydraulic system:

Clean all fittings and use care to prevent

foreign

material from entering hydraulic

system.

Additional sealant such as pipe dope or

Teflon thread tape is not required on O

-

ring

fittings.

Teflon thread tape

Is

recommended for pipe

threads. Use care when applying to prevent

excess tape from entering hydraulic

system.

Make sure all hydraulic connections are

tight and all hydraulic

lines

and hoses are

In

good condition before engaging the

tractor PTO.

ASSEMBLY

INSTRUCTIONS

1. Apply Teflon tape to the reservoir filter fitting.

2.

Install filter base inlet port

-

to reservoir fitting.

Install elbow (4) in outlet port of filter base. Ideal

orientation of the filter is vertical; position filter

base to accommodate this location. The filter

may be moved to provide clearance when

attaching backhoe to tractor

if

necessary.

Install filter in filter base.

3.

To

properly install hydraulic fittings with

O

-

rings, completely loosen locknut, screw

fitting completely in, hold in position and tighten

locknut using

two

wrenches.

4. Check pump reducers and elbows for O

-

rings

before installing them.

5.

Install reducer (1 1) in pump suction port.

6.

Install

90’

elbow (10) into reducer

(1

1).

7.

Install reducer (13) into pump pressure port.

Install elbow (14) into reducer (13).

8.

Attach one end of suction hose

(6)

to elbow (4)

at the filter and the other end to elbow (10) at

the pump and secure with hose clamps

(5).

9.

Attach hose (1

5)

to elbow (1 4).

10. When backhoe is attached to tractor, it may be

necessary to reposition filter and hoses to

eliminate interference.

11.

Service hydraulic reservoir by filling

to

“full”

mark on dipstick (approximately

5

to 5

-

1/2 US

gallons) with Dexron

II

ATF. When backhoe

is

mounted and operated, filling cylinders, it will

be necessary to add fluid to the reservoir.

(1

Fill with clean oil.

Do

not mix oil

types or grades.

Using unsuitable hydraulic oil

can damage the hydraulic system.

ASSEMBLY

INSTRUCTIONS

1. Dipperstick and breather

2. Reservoir

3. Fitter and housing

4.3"' Hose

x

3/4" pipe, 90' elbow

5.

Hose clamp

6. 3/4

x

36

"

Low

-

pressure hose

7.

Pump mounting plate

8. 1/2

x

1

"

Bo#

9. 1 -1/2" Locknut

10. 1

-

1/16

-

12

x

3/4" Hose, 90' elbow

11.1-5/8"-12x1-1/16-12Reducer

12. Pump

13.1-5/16

-

12

x

7/8

-

14 Reducer

14.

7/8"

-

14

x

9/16

-

18 Flare Elbow

15.9/16

-

18 Flare 34

"

High

-

pressure hose assembly

Figure

7.

Pump Installation

3.

Install the threaded end of the upper link

(4)

locknut

(6).

Loosen the threaded end jam nut

1.

Remove the hardware securing the backhoe to and adjust to the dimension shown for easier

the pallet (reference

8,

Figure

4).

.installation during backhoe

-

to

-

tractor

2.

Install the sub

-

frame to the backhoe as shown installation.

using the. four

7/8

x

2-1/2"

bolts

(l),

lock

washers

(2)

and nuts

(3).

Tighten to the

specified torque.

~~~~~

Sub

-

frame Installation (Figure

8)

using the

3/4

NC

x

3-1/2"

bolt

(5)

and

3/4"

A

ASSEMBLY

INSTRUCTIONS

1.

718

X

2-112"

Bolt

GR

5

3.

718

"

nut

5.314

NC

X

3-112" Bolt

GR

5

2.718

"

Lockwasher

4.

Top

link assembly

6.314

"

Locknut

Figure

8.

Sub

-

frame

Installation

20

ASSEMBLY

INSTRUCTIONS

4.

Remove and retain the four

12

x

75

mm flange

5.

Remove one of the

two

1/2

NC

x

1-1/4"

bolts

(1)

holding the

left

and right rolling pins

(2)

(3) and

1/2"

lock washer

(4)

holding the cross

to the transmission (Figure

9).

The

12

x

75

mm

shaft

(5)

to the

two

set plates

(6).

Install the set

bolts and rolling pins must be retained for

plates in place of the rolling pins

as

shown with

3

-

point hitch installation.

the four

12

x

80

mm bolts

(7)

and four

1/2"

flat

washers

(8).

Install the

1/2

NC

x

1-1/4"

bolt

(3)

and

1/2"

lock washer

(4)

removed from the set

plate and tighten to the specified torque.

Tighten the

12

x

80

mm bolts (7) to the specified

torque.

6.

Remove the

two

6

x

12

mm

flange bolts and the

rear PTO cover

(9).

\

3

'4

1.12

x

75

mm

bolt

6.

Set plate

(R)

2.

Rear

Rolling Pin

(R)

7.12

x

80

mm

Bolt

4. 112"

Lock

washer

9.

PTO

cover

5.

Cross

shaft

3.

1/2 NC

X

1-1/4"

bolt

GR

5

8.

1/2"

Flat

washer

Figure

9.

Set

Plate

Assembly

Installation

*

-

ASSEMBLY

INSTRUCTIONS

7.

Loosely install the left and right crossmember

brackets (1) to the crossmember (2) using the

eight

112 NC

x

1-1/2" bolts

(3)

and 1/2" flat

washers (4). Set the

two

4

-

hole crossmember

set plates

(5)

against the crossmember as

shown (Figure 10).

8.

Remove

and

retain the four 1/2 NC

x

2

"

bolts

(6),

eight 1/2" flat washers (4); four lock

washers (7) and four nuts

(8)

from front end

loader sub

-

frame. This hardware will be

reinstalled in the same location in step 9.

9. Loosely bolt the crossmember brackets to the

front end loader sub

-

frame assembly

(9)

using

the four 1/2 NC

x

2

"

bolts

(6),

eight 1/2 NC

x

1 -3/4" bolts (1

0),

1 /2" flat washers (4), 1 /2" nuts

(8)

and 1/2" lock nuts

(1

1) as shown.

10. Install the crossmember to the tractor's frame

(12) using the four 12

x

35

mm bolts (13) and

1/2" flat washers

(4).

Install a 2

-

hole set plate

(14)

on each side against the crossmember.

Tighten all hardware to the specified torque.

1. Bracket,

cross

member (L

&

R)

6.

1/2 NC

x

2 Bolt

GR

5

11.1/2" NC

Lock

nut

2. Crossmember

7.1/2" Lock washer 12.Tractor frame

mounting

holes

4.

1/2" Fiat washer

9.

Front end loader sub

-

frame

14.

2

-

Hole set plate

5.

4

-

Hole

set

plate

10. 1/2 NC

X

1-314" Bolt

GR

5

3. 1/2 NC

X

1-1/2"

Bolt

GR

5

8.

1/2 NC Nut 13.12

x

35

mm

Bolt

Figure

10.

Crossmember installation

22

..

ASSEMBLY

INSTRUCTIONS

H

draulic Pum Installation

#

lgure

11

and

F

igure

12)

1. Check all hydraulic fittings and lines to

be

sure

they are tight and free of kinks and twists.

2.

Back the tractor as near as possible and center

on backhoe. See Figure 12.

3.

The pump mounting bracket

(3)

is designed to

slip inside tractor’s PTO shield

(4).

Install the

bracket

so

its“off-set”is towards the tractor and

PTO.

4.

Grease the drive line sliding surfaces and slide

the female tube of the pump mounting coupler

over the male PTO shaft. See Figure 11.

5.

Check that the hydraulic pump spring activated

locking pin (2) slides freely and is seated firmly

in the tractor PTO shaft spline groove.

1-

The PTO turns at

540

RPM.

If

the coupler is not locked to the PTO shaft at

the tractor end, the pump assembly can fly

loose with great force, and

is

capable

of

causing serious injury

6.

Before installing the sub

-

frame to the tractor, it

may be necessary to reposition the hydraulic

hoses to remove kinks, bends or hose rubbing

on frame

components. Loosen the hydraulic

fittings at the pump or

oil

filter assembly and

hose connections.

Do

this quickly to minimize

hydraulic fluid leakage. Adjust the hydraulic

hose to obtain

a

suitable direction. Tighten all

hydraulic fittings and hose connections.

csr

1.

Tractor

2.

Backhoe

Figure

11.

Tractor

-

Backhoe

Alignment

4.

1

1.

PTO

2.

PTO

locking pin

3.

Pump mounting bracket

4.

PTO

shield

Figure

12.

Pump Installation

23

Attaching Backhoe

To

Tractor

The backhoe hydraulicsystem will be used

to

make

mounting on tractor easier.

It

is necessary this be

done with tractor engine running at

idle.

Am

The operator or service

person must be competent and use extreme

care during

this operation

to

prevent

equipment damage and personal Injury.

Always stand on the tractor side or

reannrard

of

backhoe to avoid the posslbliity

of

being

trapped should

the

boom swing control be

accidentally activated.

1.

Be sure backhoe controls are in centered and

neutral position.

2.

With the backhoe hydraulic pump securely

mounted, and tractor PTO and transmission in

neutral, start tractor engine idling. Engage PTO

verycarefully and allow pump to start smoothly.

Refer to the

H6522 Owner’s Manual for rear

PTO engagement.

Very little engine power 1s

requ re

o

power hydraulic system In this

mode. Should engine pull down excessively,

check plumbing hook

-

up for reversed lines or

a control lever stuck

in

an operating position.

3.

Raise

backhoe

with

stabilizer controls to

align

grooves in the right and left set plates (1) with

the cross shaft

(2)

of the sub

-

frame assembly.

Level backhoe from side to side with stabilizer

controls. See Figure

13.

4. Use the right control lever and position the

backhoe

so

that the sub

-

frame

is

lowest at the

crossmember end.

5.

Position the backhoe

so

that the sub

-

frame,

cross shaft locks completely into the grooves

of the right and left plate assemblies.

.

6.

Use the right control lever to bring the

crossmember end of the sub

-

frame into the

crossmember. Lock the sub

-

frame (1) into the

crossmember

(2)

with

the

19

x

397

mm

pin (3)

and Klik pin (4). See figure 14.

7.

Turn the upper link

(1)

threaded end until the

hole aligns with the center hole of the top link

bracket

(2).

Install the top link pin

(3)

and the

Klik pin (4). See Figure

15.

24

ASSEMBLY INSTRUCTIONS

1.

Set

plate

2.

Subframe cross shaft

3.

Bachoe sub

-

frame

Fyute13.

Sub-frame-to-Set Plate Installation

1.

Sub

-

frame end

3.

2.

Crossrnernber

assembly

4.

Klik

Figure

14.

Sub-frame-to-Crossrnember

Installation

ASSEMBLY

INSTRUCTIONS

8.

Check that the main console is perpendicular

9.

ENGAGE PTO AND

RUN

AT IDLE FOR

5

MINUTES, THEN CHECK OIL LEVEL. Add

with the tractor on a flat surface.

fluid as necessary.

10.

Operate all functions through full cylinder

stroke to purge air from system. CHECK OIL

LEVEL again and add. fluid as necessary.

Seat Installation and Adjustment

(Figure

16)

1.

Install seat and upper seat support.

2.

The seat may be adjusted fore, aft, up and

down for operator comfort.

It

is necessary to

use the

two

adjustments together. Moving the

seat down also moves

it

forward, moving it up

also moves it rearward. The fore and aft

adjustment may

be

used with the up and down

adjustment to obtain desired position. Never

operate the backhoe unless the sub

-

frame has

been installed, adjusted and operator's area

(shown shaded in Figure

16)

is

free

from

obstructions in a

40

"

radius from the seat to a

point

10

"

behind the seat back.

3.

Seat adjustment may be used to obtain

adequate head clearance.

1.

Top link bracket

(tractor)

4.

Klik

High Strength

Figure

15. Top Link

-

to

-

Tractor Installation

MINIMUM

RADIUS

1.

Seat

assembly

2.

Seat

adjusting

holes

3.

Seat

clevis

pin and

Klik

Figure

16.

Seat Installation

1

,-

I

OPERATION

Safety is

a

primary concern in the design and

manufacture of

our

products. Unfortunately, our

efforts to provide safe equipment can be erased by

a single careless act of an operator.

In addition to the design and configuration

of

equipment, hazard control and accident prevention

are dependent upon the awareness, concern,

prudence and proper training of personnel involved

in

the operation, transport, maintenance and

storage of equipment.

The best safety device is an informed, careful

operator. We ask you to be that kind of an operator.

Operating the backhoe

without adequate operator clearance may

cause the backhoe boom to pin the operator

agalnst the tractor causing serious Injury.

(Refer to Danger Label on page

8.)

The safe operation of this machine is the

responsibility of the

operator.The operator should

be familiar with the backhoe, tractor and all safety

practices before starting operation. Read the

Safety Rules on page

9

and

10.

Before working on backhoe, extend boom and

dipperstickand place bucket on ground. Make sure

that all system pressure has been relieved by

operating controls before maintenance, service

or

disconnecting any hydraulic lines.

I'

Hydraulic system leak down

and failure of mechanical or hydraulic system

can cause equipment to drop causing serious

injury.

PRE

-

OPERATION

CHECK

LIST

0

Check that backhoe and sub

-

frame are

properly and securely attached to tractor and

front end loader sub

-

frame.

!

DA

operating the backhoe

without the sub

-

frame Installed will make the

backhoe unstable which will cause serious

injury or death to the operator.

0

Check for hydraulic leaks. Use paper

or

cardboard, not body parts to check for leaks.

Make sure all hydraulic connections are tight

and all hydraulic lines and hoses are in good

condition before engaging tractor PTO.

I'

Hydraulic fluid (oil) under

pressure will penetrate skin causing serious

injury. Keep hands and body away from

pressurized lines.

Make sure that all operating and service

personnel know that in

the

event hydraulic fluid

penetrates skin, it must be surgically removed

within a few hours by a doctor familiar with

this

form

of injury, or gangrene may result.

0

During inspection, check that all nuts and bolts

are secure and clevis pins are properly cotter

pinned.

Be sure special heavy

-

duty top link, provided

with backhoe, is installed.

0

Make sure only original equipment

high

-

strength top link pin, provided with tractor,

is used to attach top link to tractor.

0

Use the high

-

strength pin provided with the

backhoe to mount the top link to the tractor

bracket.

0

Place all backhoe controls in neutral position

before starting tractor engine.

0

Check hydraulic reservoir level.

Remove transport lock bar from the boom.

Push transport lock bar down fully to prevent

damage.

0

Pull swing lock pin up and secure in storage

position with safety pin.

0

The front

-

end loader must be installed to

provide proper counterweight and

for

backhoe

operation.

!

DA

Using the backhoe with

improper counterweight will cause the tractor

to tip over causing Injury or death. Read the

safety information on page

9

and

10

before

beginning.

OPERATION

Starting and Stopping

A

tractor

-

driven PTO pump supplies hydraulic

pressure for backhoe operation. Instructions for

engaging and disengaging the PTO are in the

H6522 Owner’s Manual. Learn how to disengage

PTO quickly should an emergency occur.

Operate tractor

PTO

at

540

rpm.

Operating the pump in excess of

540

rpm

will

cause overheating and equipment damage.

Commencing Operation

1.

Consult local utilities before digging. Know

location of and avoid contacting all

underground cables, pipelines, overhead wires

and other hazards In digging area.

2.

Keep bystanders away from operator,

stabilizer and maximum bucket swing areas

(see Figure

17).

3.

Place and keep 3

-

point lift quadrant lever in

lowered position at all times.

4.

Do

not use backhoe for craning; It is designed

for digging.

Do

not use the backhoe for

craning. Using the backhoe for craning can

cause serious injury in the event of a

mechanical failure or hydraulic leak which

would cause the load

.to drop on the person

within the

“SWING

AREA”

(see Figure

17).

5.

Do

not dig with backhoe unless stabilizers are

down and on a firm surface. Stay clear of steep

areas

or

excavation banks that are

soft

or

could

give away.

6.

Do

not allow children or unqualified persons to

operate equipment.

7.

When operating controls, always sit in the

backhoe seat.

1-

Operating the backhoe

without adequate operator clearance may

cause the backhoe boom to pin the operator

against

the

tractor causing serious injury.

(Refer to Safety Label on page

8).

Figure

17.

Backhoe

Swing

Area

27

..

OPERATION

Positioning the Machine

1.

2.

3.

4.

Before operating in a unfamiliar area, walk

around the full length of the proposed site and

check for hidden holes,. drop

-

offs

or

obstacles

that could cause an accident.

Lower stabilizers until they carry the weight of

the backhoe. Place the front end loader bucket

flat on the ground. Lower the loader’s

lift

arms

until weight is removed from front tractor tires.

Level the machine using stabilizers and front

loader before starting to dig.

Stability is very important when operating

backhoe in the extreme swing positions as this

causes weight transfer.

Control Handle Operation

(Figure

18)

1.

Assume your position in the operator’s seat.

2.

When engaging PTO, engine rpm should

always be low. Once engaged, engine

rpm may

be increased to desirable operation speed (not

to exceed

540

rpm).

3.

When becoming familiarwith backhoe controls,

start with

a

lower rpm.

4.

Before operating, perform a functional test by

placing control handles in their various

positions and making certain correct operation

occurs, matching labels on operator’s console.

Pay specific attention to float position of boom.

!

DA

Do

not operate the backhoe

if

functions differ from label; serious injury or

death could occur.

5.

It is not difficult to become a successful

operator. Control lever operating labels (shown

in Figure

18)

are next to the operating control

levers. Study these labels; they will assist you

in becoming familiar with the controls.

Figure

18.

Operator’s

Console

Pulling handle

1

up will raise left

stabilizer; pushing down lowers it.

Pulling handle

2

up will raise right

stabilizer; pushing down lowers it.

Pulling left control handle back (toward

A) raises boom; pushing it forward

(toward C) lowers it. Full forward (toward

C) is the float position.

Moving left control handle left (toward

B)

swings boom left; moving it right (toward

D)

swings boom right.

Pulling right control handle back (toward

E)

moves dipperstick down and toward

operator; pushing it forward (toward

G)

moves it

up

and away

from

operator.

Pushing right control handle left (toward

F) curls bucket toward operator; pushing

it right (toward

H)

extends bucket out

away from operator.

28

OPERATION

6.

7.

8.

9.

Operate control levers, swinging boom several

times to practice control.

Do

not operate swing

more than

45'

each way the first few times.

Gradually increase arc.

After becoming familiar with the backhoe

operation, practice coordinated use of the

controls in a safe open area at reduced engine

speed. Gradually increase engine speed as the

technique is mastered.

Operate backhoe gently and smoothly. Avoid

swinging boom into mainframe. Sudden

stopping

or

jerking could result in serious

damage to tractor and backhoe.

Strive to develop a smooth digging cycle. Avoid

abrupt

or

jerky movements. This is

accomplished by operating two

or

more

controls at the same time and not allowing the

cylinders to reach the limit

of

travel.

10.

Should

you

become confused

or

lose your

control orientation during operation, simplyturn

loose of the controls and reorient yourself.

Starting the Excavation (Figure

19)

Consult local utilities before

digging.

Know location

of

and avoid contacting

all underground cables, pipelines, overhead

wires and other hazards

In

digging

area.

1.

To start the excavation, position backhoe as

shown for maximum breakout force.

2.

Actuate the dipperstickcylinder to start digging.

Approximately halfway through digging cycle,

start bucket curl while continuing crowding

dipperstick

in.

Should bucket stall, raise boom

slightly.

3.

Do

not use down pressure on the boom when

starting to dig,

as

this will

lift

machine and move

it out of alignment with the work.

Filling the Bucket (Figure

20)

1.

Control bucket attitude throughout digging

cycle to keep teeth parallel to bottom

of

excavation. This will provide best penetration

angle and minimize dragging and scraping

bucket through the ground.

2.

Penetration depth is determined by soil

condition and type.

3.

4.

5.

Figure

19.

Starting Excavation

Only use dipperstick and bucket during the

digging cycle. As the dipperstick moves the

bucket through the soil, curl bucket to maintain

proper bucket position.

At the end of the pass,

or

when bucket is full,

curl bucket completely, lift bucket from

excavation and swing boom to dump site at

least

two

feet away from opening.

To obtain a cleaner trench and avoid material

buildup directly in front of backhoe, extend

dipperstick and curl bucket completely while

starting to lift it out

of

the excavation. This will

allow excess material to fall back into the

excavation.

Figure

20.

Filling

Bucket

29

’-

I

OPERATION

Dump

and Return Cycle

Keep the swing

-

dump

-

return cycle as brief as

possible. Keep dipperstick moving outward and

start boom swing as soon as the bucket clears the

excavation. Continue extending dipperstickand, as

you approach the spoil pile, start

to

dump bucket.

When bucket is empty, dipperstick and bucket are

in position to resume digging upon return to the

excavation.

Trenching and Excavating

Procedures

(Figure

21)

Trenching is the most basic backhoe digging

operation. Other operations are variations of this

basic function.

1.

2.

3.

4,

To

maintain a level trench bottom, set bucket

at proper approach angle and while crowding

dipperstick in, continually move bucket curl

lever to maintain correct cutting angle. At the

same time, place boom control in the full

forward (float) position and keep the bucket in

the same plane.

When handle

is

placed in the float position,

pressure on both sides of boom cylinder is

released.

Digging near center of swing

so

material may

be dumped on either side will produce good

results. Never dig near stabilizers.

Continue the trench by moving machine along

trench centerline away from existing

excavation. Move machine approximately

one

-

half the effective backhoe reach. Moving

too far will require excessive down pressure for

digging and hand clean

-

up

of

trench bottom.

Figure

21.

Trenching

30

OPERATION

Side

Slo

e

Trenching

or

Excavating

(Figure

B

2)

1.

When operating on a side slope, the backhoe

must be positioned using the method shown in

Figure

22.

2.

Cut a level spot

for

the uphill side

of

the

machine and place the spoil from the levei spot

on the downhill side.

3.

Be careful when swinging loaded bucket on a

hillside. When operating on a side slope,

always place the trench spoil on the “UPHILL”

side of backhoe to minimize the possibility of

upsetting the tractor.

1-

Dumping

the

spoil

on

the

“DOWNHILL”

side

of

the tractor

wlll

cause

the

tractor to upset causing serious

injury.

Dump

the spoil on the

“UPHILL”

side.

UPHILL

CUT

LEVEL

SPOT

c

J

Figure

22.

Cutting

a

Level

Slot

for

Uphill Side

DOWNHILL

31

'

-

OPERATION

Transporting

1.

Engage the swing and boom transport locks

and attach Slow Moving Vehicle (SMV) sign

before transporting backhoe. When

transporting, you must wear a seat belt

if

your

tractor has

ROPS

installed.

2.

Lower the bucket to the ground, shut the engine

OFFand remove the ignition key before leaving

the equipment unattended. Never leave

equipment unattended with engine running or

with bucket in raised position.

Trans ort and Swing

Lock

Instal

P

ation

(Figure

23)

1.

Engage transport lock by fully retracting boom

and dipperstick.

3

2.

Position transport lock bar

(l),

located on right

side of swing frame, over transport lock pin

(2).

3.

Center boom from side to side and install swing

lock pin

(4)

through kingpost plate

(5)

and

boom. Secure swing lock pin

(4)

with a safety

(6)

as shown.

4.

Always raise stabilizers before transporting

backhoe.

5.

Before operating backhoe, disengage

transport lock bar and store swing lock pin.

-1

Operating the backhoe with the

lock bar installed can damage the equipment.

1.

Transport

lock

bar

4.

Swing

lock

2.

Transport

lock

5.

Kingpost plate

3.

Bumper pad

6. Safety

Figure

23.

Transport

&

Swing

Lock

Installation

32

OPERATION

Removing and Storing Backhoe

Keep all persons away from

operator control area while removing or

Installing backhoe or performing adjustments,

service or maintenance.

1.

The hydraulic system will be used

to

remove

the backhoe. It is necessary this be done with

tractor engine running at Idle. The operator

or

serviceman must be competent and use

extreme care during this operation. Always

stand on the tractor side

or

rearward of

backhoe.

1-

The boom swing control can

be activated by accident trapping you and

causing severe Injury. Stand to the side when

removing the backhoe to prevent equipment

damage and personal injury.

2.

Remove seat and upper support assembly

before installing

or

removing backhoe from

tractor.

Sub

-

frame Mounting Removal

(Figure

24)

1.

2.

3.

4.

n

Center the boom and install swing lockpin, then

extend boom and dipperstick. Rest bucket on

the ground. Lower the stabilizers to take

backhoe weight

off

of

the tractor. Remove pin

that attaches the top link to the tractor.

Remove the pin that secures the sub

-

frame to

the crossmember. Raise the rear of the

backhoe with stabilizers to pivot the front of the

sub

-

frame down.

Roll

the tractor forward to

dislodge the sub

-

frame’s cross shaft

from

the

set plate assembly.

Place blocks under the main frame and raise

the stabilizers to lower the backhoe mainframe

onto the blocks. Block the backhoe as

necessary

to

make it stable. Lower the backhoe

to

a

stable position relieving all hydraulic

pressure.

Disengage the PTO, stop tractor engine and

remove key. Remove pump from the PTO and

secure it to the backhoe.

1.

klik pin

2.

clevis pin

3. Upper link

4.

Upper

link

bracket

5.

Klik

9.

Sub

-

frame cross

shaft

6.

10.

Set

plate

7.

Sub

-

frame

11.

Sub

-

frame

8.

Crossmember

Figure

24

Removing Backhoe

33

TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION

1.

Noisy pump caused by a. Oil too heavy a. Change to proper viscosity.

cavitation

b. Oil filter plugged

b. Replace filter.

c. Suction line plugged or too c. Clean line and check for size.

small

2.

Oil heating a. Oil supply low a. Fill reservoir.

b. Contaminated oil

b.

Drain reservoir, change filter

and refill with clean oil.

c. Setting of relief valve too high c. Set

to

correct pressure.

d. Oil in system too light

d.

Drain reservoir and refill with

or too low

proper viscosity oil.

e. Pump operating too fast e. Do not exceed

540

rpm PTO

speed.

3.

Shaft seal leakage a. Worn shaft seal a. Replace shaft seal.

b. Broken diaphragm seal or

b,

c

&

d.

If

replacing the shaft

back

-

up gasket seal does not stop leakage,

the pump should be

disassembled and checked

for items b, c

&

d.

c.

Bearings out of position

d.

Excessive internal wear

4.

Foaming oil a.

Low

oil level a. Fill reservoir.

b.

Air leaking into.suction line

b.

Tighten fittings.

c. Wrong kind of oil

c. Drain and

fill

reservoir with

non

-

foaming oil.

d.

Moisture in oil

d.

Kee oil temperature below

180

F and continue to

operate as

oil

dries out, or

replace

oil

and purge system

if

foaming is excessive.

5.

Boom drops as dipperstick or a. Check valve leaking

a

Clean or replace check valve

E

bucket cylinder lever is assembly.

activated while boom control

is in raised position

34

I

=-,

SERVICE

&

MAINTENANCE INSTRUCTIONS

SERVICE

&

MAINTENANCE INSTRUCTIONS

Keep hands and body away from pressurized lines.

Use paper

or

cardboard, not body parts to check

for leaks.

4-

Hydraulic fluid (oil) under

pressure will penetrate skin causing serious

injury.

Make sure that all operating and service

personnel

knowthat In the event hydraulic fluid

penetrates skin, it must be surgically removed

within a few hours by a doctor familiar with this

form of injury, or gangrene may result.

Make sure that all operating and service personnel

know that in the event hydraulic fluid penetrates

skin, it must be surgically removed within a few

hours by a doctor familiar with this form of injury,

or

gangrene may result.

Always wear relatively tight and belted clothing to

avoid entanglement in moving parts. Wear sturdy,

rough

-

soled work shoes and protective equipment

for eyes, hands, hearing and head.

Before working on backhoe, extend boom and

dipperstickand place bucket on ground. Make sure

that all system pressure has been relieved by

operating controls before maintenance, service

or

disconnecting any hydraulic lines.

m

Hydraulic system leak down

and failure

of

mechanical or hydraulic system

can cause equipment to drop causing injury.

Make sure all hydraulic pressure is relieved off

of the backhoe before performing service on

the equipment.

Hydraulic System (Figure

25)

A-

Daily, check the fluid level in reservoir with filler cap

dipstick. Contamination will shorten the

life

of

hydraulicsystem components. Change oil and filter

after first

20

hours of operation and then every

200

hours of operation

or

annually, whichever occurs

first.

In

extremely dusty

or

dry conditions, more

frequent changes may be necessary. System

capacity

is

approximately

5

to

5

-

1/2

U.S.

gallons.

1.

Operate tractor PTO at

540

rpm until the

system reaches operating temperature.

3

4

1.

Oil

breather cap

3.

Oil

filter

2.

Oil

filler

neck

4.

Oil drain

plug

Figure

25.

Oil Maintenance

2.

Remove the drain plug

(4)

from the hydraulic

oil

reservoir.

3.

Drain the oil into a suitable container and

dispose of properly.

Note: Please dispose of used hydraulic

oil

in a

manner that is compatible with the environment.

Do not throw it in the trash

or

pour it on the ground.

4.

Put the oil pan under the oil filter

(3).

Remove

the hydraulic oil filter.

5.

Clean the oil filter mounting base. Lightly

lubricate the new filter O

-

ring and install the

filter onto the base.

6.

Fill

with clean oil.

Do

not mix oil types orgrades.

rn

Hydraulic system fallure may

occur y using an unsuitable hydraulic

oil.

Use

only Dexron

II

type

ATF.

7.

ENGAGE PTO AND RUN AT IDLE

FOR

5

MINUTES, THEN CHECK

OIL

LEVEL. Add

fluid as necessary.

35

-

,

SERVICE

&

MAINTENANCE INSTRUCTIONS

Relief Valve

This valve

is

preset at the factory to prevent system

pressure exceeding

2000

psi.

Do

not attempt to

reset the valve.

If

it is malfunctioning, replace

it

with

an authorized factory replacement part.

Swing Chain Adjustment (Figure

27)

1.

Center boom to mainframe. Loosen locknuts

on chain adjustment bolts and tighten nuts on

adjustment rods until all slack

is

removed from

chains.

-1

Do

not over

-

tighten the chain.

Over

-

tightening will cause excessive load and

premature failure.

2.

Tighten locknuts on chain adjustment bolts.

Kingpost and Swin Cylinder Bolt

Inspection (Figure

9

7)

Kingpost and swing cylinder bolts were installed

using Loctite and should not loosen. However, they

should be checked daily to be sure they are tight.

Should any loosen, or when replacing them during

a repair operation, clean bolts and nuts, apply

Locquicprimer and Loctite

609.

Tighten as outlined

in torque chart on page

1

1.

Replacement

tooth

2.

Tooth

shank

Figure

26.

Tooth Replacement

Bucket Tooth Replacement

(Figure

26)

1.

Remove worn tooth by driving a chisel between

2.

Install replacement tooth and use

a

punch to

shank and tooth.

peen tooth to shank on both sides.

1.

Kingpost 3. Mainframe

2.

Swing cylinder

4.

Chain adjustment

Figure

27.

Chain Tightening

&

Bolt

Torque

36

SERVICE

&

MAINTENANCE INSTRUCTIONS

Hydraulic Hoses and Fittings

1.

Hydraulic hoses are severely worked on a

backhoe. Examine them daily and replace

if

necessary. Hose routing is very important.

Make certain hoses can move freely, without

kinking, and cannot be damaged or cut by

backhoe action.

2.

When tightening hoses and fittings, always use

two wrenches: one to hold hose and one to

tighten the fitting. This will prevent hose from

twisting and kinking.

3.

Always back locknut

off

and screw fitting all the

way in for fittings that must be positioned and

that use O

-

rings for sealing. Then hold in

position and tighten locknut. Fittings with

O

-

rings and flange do not require additional

sealant, replace damaged O

-

rings.

-1

Teflon tape should be used to

seal pipe threads. Use care when applying

Teflon Tape to prevent It from entering the

hydraulic system.

Notes

C

37

ct

1

I

SERVICE

&

MAINTENANCE INSTRUCTIONS

I

Lubrication (Figure

28)

Keep

all

persons away from

0perato.r control area while performing

adjustments, service

or

.maintenance.

1.

Do

not let excess grease collect on or around

parts, particularly when operating in sandy

areas. The accompanying illustration shows

lubrication points for the backhoe.

2.

It is recommended that all fittings be lubricated

daily

or

every eight hours of operation. In very

wet

or

dry

conditions, lubricate every four hours

of operation.

3.

4.

Use an

SAE

multi

-

purpose type grease for all

locations shown unless otherwise specified. Be

sure to clean fitting thoroughly before using

grease gun. One good pump of most guns is

sufficient.

Position backhoe for easy lubrication by

placing boom and dipperstick at

90'

to each

other with bucket cutting edge vertical and

teeth resting on ground. Raise stabilizers to

lubricate rod end of cylinders.

1.

Bucket pivot

2.

Bucket pivot

3.

Bucket cylinder rod end

4.4

-

Bar pivot

5.

Bucket cylinder base end

6.

Dipperstick pivot

7.

Dipperstick cylinder rod end

8.

Boom cylinder base end

9.

Dipperstick cylinder base end

10.

Boom cylinder rod end

11.

Boom pivot

12.

Swing chain

(20W

motor

oil)

13. Stabilizer cylinder base end (right

&

left)

14.

Stabilizer pivot (right

&

left)

15. Stabilizer cylinder rod end (right

&

left)

16.

Swing frame pivot (top

&

bottom)

Figure

28.

Lubrication

Points

38

SERVICE

&

MAINTENANCE INSTRUCTIONS

HYDRAULIC CYLINDER REPAIR

General Hydraulic Repair

Information

A

clean working area is necessary for any hydraulic

repair. Repairing hydraulic components in

a

dirty

area is

a

waste of time.

All

parts must be carefully cleaned before

reassembly. We recommend that when repairing

hydraulic components, you always replace existing

seals with new ones. Clean

all

components in

solvent and blow dry with low pressure air.

Threaded Collar Type Cylinder

Repair (Figure

29)

Cylinders are obtained from

two

suppliers. It

Is

Important that you properly identify the

manufacturer of the cylinder you are repairing.

Cylinders have either an “E” or

“L”

stamped in the

barrel near the butt end.

Make proper manufacturer identification, then refer

to the

“E”

or

“L”

column when ordering parts.

Disassembly

1.

Loosen set screw and unscrew threaded collar

(2)

from barrel (9). Pull on rod

(4)

to remove

piston from barrel.

2.

Clamp cross

end of rod assembly

(4)

in a

vise with protective jaws. Remove locknut

(6)

from

rod assembly. Remove piston

(7)

and

gland

(8)

from rod.

3.

Remove

and

discard

all

seals, wear rings and

O

-

rings.

4.

Clean

all

components in solvent and blow

dry

with low pressure air.

1

Assembly

i

1.

Lubricate O

-

rings

and

seals with clean

hydraulic fluid. Install back

-

up washer (3H) on

gland

(8),

then install O

-

ring (3E)

in

exterior

O

-

ring groove of gland. Install rod seal (3F) into

inner groove of gland with open portion of

V

-

groove toward piston.

1

,,5

IDENTIFICATION

STAMP

1.

2

x

16-3”’

Hydraulic cylinder

2.

Collar

3.

Seal

k‘it

(contains

3A

through

3H)

3A.

Rod

static seal

38. Wear ring

3C. O

-

Ring

3D.

Piston seal

3E.

Gland static seal

3F. Rod seal

3G.Rod wiper

3H.

Back

-

up washer

4.

Rod assembly

5.

Grease zerk

6.

7/8“ Self

-

lock

hex

nut

7. Piston

8. Gland

9.

Barrel assembly

Not

used

in

cylinder stamped

“L”

Figure

29.

Hydraulic Cylinder

(Threaded Collar

Style)

SERVICE

81

MAINTENANCE INSTRUCTIONS

2.

Place rod wiper

(3G)

in outer gland groove.

Slide gland assembly

(8)

onto rod. Place wear

ring

(3B)

in wide groove of piston. Place O

-

ring

(3C) and piston seal (3D) in narrow piston

groove.

3.

Lightly coat rod threads with hydrauvc oil and

slide O

-

ring (3A) over threads and into groove.

Install piston

(7)

onto rod

(4)

with wear ring on

side away from gland. Install locknut

(6)

and

torque

to

175

ft

-

lbs.

4.

Compress wear ring and piston seal and

carefully insert piston and rod assembly into

barrel. Use care to prevent damage while

installing.

5.

Install collar

(2)

onto barrel

(9)

and tighten.

Tighten set screw.

/

Lock Wire or Threaded

Plug

Style

Cylinder (Figure

30)

Note: Cylinders used in the same application are

provided

from.two suppliers. One uses

a

lock wire

and one uses

a

threaded plug for

a

locking device.

Lock wire cylinders

can

be identified by

the

“L”

stamped on butt end of cylinder.

All

threaded plug cylinders have

an

“E”

stamped

on

butt end of cylinder.

Be sure to make the proper manufacturer

identification before ordering repair parts.

Lock Wire Removal (Cylinder

stamped

“L”)

Insert

a

screwdriier into slot in barrel. Pry up on

end of lock wire

and

turn gland until lock wire feeds

out through slot.

Threaded

Plug

Removal

-

(Cylinder

stamped

“E”)

Unscrew threaded plug using

a

spanner wrench,

or

carefully use punch and hammer to remove.

DISASSEMBLY

1.

Remove piston and rod assembly from barrel.

2.

Clamp

cross

pin end of rod assembly in vise

with protective jaws. Remove locknut from rod.

3.

Remove and discard all seals, wear rings and

O

-

rings.

IDENTIFICATION

STAMP

1.

2

-

1/2

x

16-3”’

Hydraulic cylinder

2.

Rod

assembly

3.

1/4

-

28

Grease fitting

4.

Seal

kit

(contains

4A

-

4J)

4A.

Rod

static seal

48. Wear strip

4C.

0

-

Ring

4D.

Piston seal

4E. Gland static seal

4F.

Rod seal

4G. Rod wiper

‘4H. Lock

wire

“4J. Back

-

up washer

5.

7/8“

Self

-

lock hex nut

6.

Piston

7.

Gland

8.

Barrel assembly

**9.

Threaded retainer

‘Used on lock wire cylinder

-

stamped

“L”

**Used on threaded plug cylinder

-

stamped

“E”

Figure

30.

Hydraulic Cylinder

(Lock

Wire

or

Threaded

Plug

Style)

40

-

SERVICE

&

MAINTENANCE INSTRUCTIONS

4.

Clean all components in solvent and blow dry

with low pressure air.

ASSEMBLY

1.

Lubricate O

-

rings and seals with clean

hydraulic fluid.

2.

Assemble using exploded view. Note that items

(48)

and

(4H)

are used with lockwire cylinder

only. Note that items

(4J)

and

(9)

are used with

threaded plug cylinder only.

3.. Torque locknut to

175

ft

-

lbs.

4.

Carefully insert piston and rod into barrel.

It

will

be necessary to compress wear ring and piston

seal to avoid damage during insertion.

Lock Wire Installation

Rotate gland until lock wire starting hole in gland is

visible through slot in barrel. Insert lock wire hook

into hole and pull into groove by rotating gland until

wire is completely seated.

Threaded Plug Installation

Screw threaded plug into cylinder using a spanner

wrench, or carefully use a punch and hammer.

Swing Cylinder (Figure

31)

DISASSEMBLY

1.

Remove hex nuts

(4)

from tie rods

(2).

2.

Remove both piston rod guides

(5)

from barrel

3. Remove and discard rod wiper and seal

4.

Remove rod assembly (7) from barrel

(6).

5.

Clean

all

components in solvent and blow dry

(6)-

(3A&3B) from each piston rod guide.

Remove and discard seals.

with low pressure air.

ASSEMBLY

1.

Lubricate seals and wipers with clean hydraulic

fluid.

2.

Install O

-

ring

(3D)

in groove on piston and

piston seal

(3E)

on top

of

O

-

ring in piston

groove.

1.

Hydraulic swing cylinder complete

2.

7/16

x

16

"

Tie

rod

3.

Seal

kit

(contains

3A

-

3F)

3A.

Rod

wiper

38.

Rod

seal

3C.

Gland

static

seal

3D.

O

-

Ring

3E.

Piston seal

3F.

Back

-

up ring

4.

7/16

Hex

nut

5.

Piston rod guide

6.

Barrel

7.

Rod assembly

Figure

31.

Swing Cylinder

41

3.

4.

5.

Carefully insert piston and rod into barrel.

6.

Piston seal must be compressed when

inserting.

Carefully insert piston and rod into barrel.

Piston seal must be compressed when

inserting.

Place back

-

up ring

(3F),

if

required, into groove

7.

on piston rod guide

(5)

then install O

-

ring

(3C)

into groove. Install rod seals

(3B),

with

V

-

groove toward piston, into each piston rod

guide outer groove.

SERVICE

&

MAINTENANCE INSTRUCTIONS

.i

When installing piston rod guides to barrel,

I

make sure chain fastening lugs are positioned

properly. With cylinder in front of you, place

right rod guide with chain lugs on bottom and

left rod guide with chain lugs on top as

illustrated.

Insert the four tie rods

(2)

with rod guide chain

hole centerlines parallel. Torque nuts

to

40

-

45

ft

-

lbs.

NOTES

,

SERVICE

&

MAINTENANCE INSTRUCTIONS

HYDRAULIC PUMP REPAIR

(Figure

32)

Pump repair is limited to seal replacement.

DISASSEMBLY

1.

Remove key

(7)

from shaft.

2.

Clean outside of pump thoroughly.

3.

Clamp pump in vise,

shaft

up.

4.

Remove tie bolts

(1

6),

four each.

5.

Remove tie bolts

(1

7), four each.

6.

Use sharp tool to mark across front plate, body

and back plate. This will assure proper

reassembly.

123

7.

Remove pump from vise, hold pump in hands

and bump shaft against a wooden block to

separate front plate

(14)

from back plate

(1).

Body

(4)

will remain with either front plate

or

back plate.

8.

To separate body from section it remains with,

place drive gear

(6)

in bearing and tap

protruding end with plastic hammer.

9.

Remove thrust plate.

(3)

from back plate.

10.

Remove O

-

ring

(2)

from back plate.

11.

Remove O

-

ring

(2)

from front plate.

12.

Remove .,diaphragm

(8)

from front plate by

13.

Lift springs

(1

2)

two

each, and steel balls

(13)

14.

Lift back

-

up gasket

(9)

and protector gasket

15.

Lift diaphragm seal

(1 1)

from front plate.

16.

Remove shaft seal

(1

5)

from plate.

prying with sharp tool.

two

each, from front plate.

(1

0)

from front plate.

456

8

910

11

2

I

18

i

0

12

13

14

15

16

I-'

-

17

1. Back plate assembly

7.

114

x

114

x

15/16 Key

13. Steel ball

2. O-Ring

8.

Diaphragm

14. Front plate assembly

3. Thrust plate

9.

Back-up gasket

15. Shaft seal

4.

Body

10.

Protector gasket

16.

Tie

bolt

5.

Dowel pin

11. Diaphragm seal 17. Tie

bolt

6.

Drive gear assembly 12. Spring 18. Idler gear assembly

Figure

32.

Pump Assembly

43

SERVICE

&

MAINTENANCE INSTRUCTIONS

I

INSPECT PARTS

FOR

WEAR

General

Clean and dry

all

parts.

Remove nicks and burrs from all parts with emery

cloth.

Gear

Assembly

1. Inspect drive gear shaft (6) for broken keyway.

2. Inspect both the drive gear and idler gear shafts

at bearing points and seal area for rough

surfaces and excessive wear.

3.

If

shaft measures less than .873" in diameter in

bearing area, the pump should be replaced.

4. Inspect gear face for scoring and excessive

wear.

5.

If

gear width is below 1.067", pump should be

replaced.

6. Assure that snap rings are in grooves on either

side of drive and idler gears.

7.

.If

edges of gear teeth are sharp, break edge

with emery cloth.

Front

&

Back

Plates

Oil grooves in bearings in both front and back

plates should be

in

line with dowel pin holes and

180' apart. This positions the oil grooves closest

to the respective pin holes.

If

ID of bearings in front plate

or

back plate exceeds

.879",

pump should be replaced.

Bearings in front plate should be flush with islands

in

groove pattern.

Body

Check inside gear pockets for excessive scoring

or

wear.

Pump should be replaced

if

the

ID

(internal

diameter) of the gear pocket exceeds 2.1

07

"

.

REASSEMBLY

1. The thrust plate, diaphragm, back

-

up gasket,

protector gasket, diaphragm seal, shaft seal

and

O

-

rings should be replaced as new parts.

Install O

-

ring (2) in groove in front plate (14).

2.

Tuck diaphragm seal (1 1) into grooves in front

plate with open part of

"V

section down. (Use

dull tool.)

3. Press protector gasket

(10)

and back

-

up

gasket (9) into diaphragm seal.

4.

Drop steel balls (1 3) into respective seats and

place springs (12) over balls.

5.

Place diaphragm

(8)

on top

of

back

-

up gasket,

bronze face up.

6.

Entire diaphragm must fit inside the raised rim

of the diaphragm seal.

7. Dip gear assemblies into oil and slip into front

plate bearings.

8. Install dowel pins

(5)

in body (4).

9.

Apply a thin coat of heavy grease to both milled

faces of body. Slip body over gears onto front

plate (half moon port cavities in body must face

away from front plate). Note small drilled hole

in one of the cavities. This hole must be on

pressure side

of

pump.

10. Install thrust plate

(3), bronze face toward

gears. Side with mid

-

section cut away must be

on suction side of pump. Thrust plate must fit

inside gear pockets.

11. Install O

-

ring (2) in groove in back plate

(1).

12. Slide back plate over gear shafts until dowel

pins are engaged.

13. Install bolts

(1

6

&

17) and tighten evenly

to

40

ft

-

lbs. torque.

14. Work shaft seal over drive gear shaft, taking

care not to cut rubber sealing

lip.

(Oil seal

liberally

before

installing.)

15. Place 1

-

5/1 6

"

O.D. (outside diameter) sleeve

over shaft and seat shaft seal by driving with

plastic hammer.

16.

Rotate pump shaft by hand orwith pliers. Pump

will have small amount

of

drag, but should turn

freely after short period of use.

I

44

I

;'

SERVICE

&

MAINTENANCE INSTRUCTIONS

GENERAL PUMP INFORMATION

Direction of rotation on all

"L"

Series pumps with

two

ball checks in the front plate may be reversed

by removing the tie bolts and rotating back plate,

thrust plate and body

180'.

It is important that the relationship of the back plate,

thrust plate, body and front plate is correct. You will

note

two

half moon cavities in the body which must

face away from the front plate. Note also a small

drilled hole in one

of

these cavities. This hole must

be

on the pressure side of the pump. Side

of

thrust

plate with mid

-

section cut away must be on suction

side of pump.

Suction side of back plate is always the side with

the larger port boss. Pumps using only one ball

check in the front plate cannot be reversed.

Refer to Placing Pump Back in Service, page 21.

Placing Pump Back Into

Service

1.

Before starting pump, it is recommended to

prime it first.

2.

If shop test stand is available, the following

procedure for testing rebuilt pumps is

recommended:

a.

Mount pump on test stand, making sure that

the proper level of clean oil is available in the

reservoir. Check suction line for leaks and

obstructions.

b.

Start pump and run for three minutes at

200

psi pressure.

c.

Intermittently

load

pump

to

500

psi

for

three

minutes.

d.

Intermittently load pump to 1000 psi for three

minutes.

e. Intermittently load pump to 2000 psi for three

minutes.

f.

Relieve pressure, remove pump from test

stand and check for looseness of drive shaft.

Check for leaks.

3.

It shop test stand is not available, the following

procedure for testing rebuilt pumps is

recommended:

a.

Mount pump on equipment and run pump at

1/2 engine speed at 200 psi pressure.

b.

By operating control valve, build pressure

intermittently for three minutes.

c. Increase engine speed to full throttle and

build pressure intermittently for three

minutes.

d.

Idle engine and check for leaks.

SERVICE

&

MAINTENANCE INSTRUCTIONS

,

-

I

Figure 33.

Hydraulic Valve Repair

46

SERVICE

&

MAINTENANCE INSTRUCTIONS

1. Complete hydraulic valve

2. Shodddampening valve, 3500 psi

3. Check valve assembly

a. Poppet

b.

Spring

c. Seal

d. Car plug

4AA.

ShocWdampening valve, 2000 psi

a. Cap nut

b.

Washer

c. Adjusting screw

d. Retainer

e. Rear spring washer

f.

Copper washer

g. Spring for relief valve

h. Front spring washer

i.

Valve poppet

j.

Back

-

up ring

k.

Seal

1.

Valve seat

m. Back

-

up ring

n. Washer

0.

Ball, Dia. 5

4BB.

ShocWdampening valve, 2500 psi

4CC.

ShocWdampening valve,

2000

psi

5.

ShocWdampening valve, 2500 psi

a. Cap nut

b.

Washer

c. Adjusting screw

d. Retainer

e.

Copper washer

f.

Rear spring washer

g. Spring for relief valve

h. Front spring washer

i.

Valve poppet

j.

Back

-

up ring

k.

Seal

1.

Valve seat

m. Back

-

up ring

n. Seal

0.

Washer

6.

1350

-

3000 Psi Relief valve assembly

a. Cap nut

b.

Copper washer

c.

Adjusting screw

d.

Retainer

e. Copper washer

1. Rear spring washer

g. Spring

h.

Front spring washer

I

i.

Valve poppet

j.

Valve seat

7.

Spool position control

04

assembly

a. Plug for

04

positioner

b. Snap ring

c. Bushing for

04

positioner

d. Ball

e. Spring

f.

Ball

g. Connecting bolt

h. Washer

i.

Spacer

j.

Spring for

04

positioner

k.

Spring flange

1.

Housing

m. Boom segment

n. O

-

Ring

0.

Flanged washer

p. Dowel bushing

q.

Scraper

r. Lever bracket

s.

Cap screw

1.

Spool

8.

Dipstick segment complete

a. Plug

b. Housing

c. Connecting bolt

d. Spring cap

e. Spring

f. Spring cap

g.

Spacer

h. O

-

Ring

i.

Dipstick segment

j.

O

-

Ring

k.

Flanged washer

1.

Dowel bushing

m.

Scraper

n. Lever bracket

0.

Cap screw

p.

Spool

9. Seal

10. Seal

1 1. Spacer

12. Standard exhaust section

13.

Front port inlet section

14.

Bucket segment

15. Right stabilizer segment

16. Left stabilizer segment

17. Swing segment

18.

Nut

19. Tie rod

47

SERVICE

&

MAINTENANCE INSTRUCTIONS

HYDRAULIC VALVE REPAIR

(Figure

34)

Valve repair should be accomplished in a clean

work place. Individual components for many

of

the

assemblies are not available as repair parts. This

will simplify repair and allow you to replace

complete assemblies.

~

Pressure Settings on

ShocWDampenmg Valves

Pressure settings on shocWdampening valves are

preset at the factory. Although they are adjustable,

they must not be reset in the field using backhoe

hydraulic system. The backhoe pump will separate

or

crack

if

system pressure exceeds the maximum.

Relief valve adjustment requires

a

test bench and

accurate gauges.

Adjusting System Relief Valve

Pressure

Place a pressure gauge in the pump pressure line

at the relief valve. When installing pressure gauge,

be sure to use steel fittings that will withstand

working pressure up to

5000

psi. Remove cap nut

(6a). Adjusting screw (6c) has a hex socket

-

rotate

screw clockwise to increase pressure and

counter

-

clockwise to decrease pressure. Start

tractor PTO and set system relief valve pressure at

2000

psi. When pressure

is

adjusted, shut tractor

PTO

and

tractor

off.

Replace cap nut (6a) on

system valve.

Re lacing ShocWDarnpening

Va

P

ves

It is not necessary

to

remove console valve from

console to replace

shock/dampening valve

cartridges. Remove console cover and replace

them. Be sure you install valve cartridges set at the

correct pressure. Valves are similar and can be

easily mixed up.

.

ShocWDampening

Pressure

2

3500

PSI

.

4AA

4BB

2000

PSI

2500

PSI

5

2000

PSI

4cc

2500

PSI

Valve

Setting

Segment Replacement

1.

2.

3.

Relieve system pressure and remove valve

from backhoe. Remove tie rods and separate

the valve sections.

Replace defective sections as necessary.

Make sure you install

two

spacers between

each section of each tie rod. Note the location

of O

-

rings

(9

&

lo)..

They must be placed in

location between valve sections as shown.

When assembling valve sections, use care

when torquing nuts on tie rods. This must be

done in steps

-

that is to say, gradually

increasing the tightening torque up to

13

ft

-

lbs.

in an alternating sequence. Non

-

uniform

or

excessive tightening can cause binding of

spools. Failure to attain the proper torque can

result

in

leaks. Always use

a

torque wrench.

40

SERVICE

&

MAINTENANCE INSTRUCTIONS

Installing Valve (Figure

34)

1.

2.

3.

4.

5.

Reconnect control linkage to valve.

Adjustment of the linkage should not be

necessary unless

it

was disturbed.

Control handles should

be

positioned with

console as shown.

When completing a maintenance function on

the valve, perform a functional test by placing

control handles in their various positions and

make certain the correct operation occurs

corresponding

to

the decals on the operator’s

console. Pay specific attention to the float

position of the boom.

Do

not operate backhoe

if

functions

differ

from the decal.

If the functions differ from the decal, check

to

make sure control linkage is correctly installed

and check plumbing schematics to make sure

hoses are correctly connected.

REAR

VIEW

SIDE

VIEW

Figure

34.

Linkage Installation

PLUMBING SCHEMATIC

Use this figure and Figure 36 for plumbing

schematics. Letters are for hose

connection locations for both Figure 35

and Figure 36.

1. 114

x

114

"

Straight adapter union

3.114

x

114" 90OAdapter union

4. 114

x

114" 90' Adapter union with

5.

Relief valve

6.

Shock dampening valve, 2500 psi

7.

Shock dampening valve, 2000 psi

8.

Shock dampening valve, 2000 psi

9. Shock dampening valve, 3500 psi

10.

Shock dampening valve, 2500 psi

1

1. Shock dampening valve, 2500 psi

The

BH6575 uses a 114

x

114

"

straight

adapter union with 3/32

"

restrictor in the

rod end of the boom cylinder.

111 6

"

restrictor

LEGEND

A

from top

port

of

boom valve segment to piston end of boom cylinder

B

from bottom

port

of valve boom segment to rod end of boom cylinder

C

from top

port

of valve swing segment to bottom left

port

of swing cylinder

D

from bottom

port

of valve swing segment to top right

port

of swing cylinder

E

from top

port

of valve left stabilizer segment to rod end of left stabilizer cylinder.

F

from bottom

port

of valve left stabilizer segment to piston end of left stabilizer

G

from top

port

of

valve right stabilizer segment to rod end of right stabilizer

H

from bottom

port

of valve right stabilizer segment to piston end of right

J

from top

port

of valve bucket segment to piston end of bucket cylinder

K

from bottom

port

of valve bucket segment to rod end of bucket cylinder

L

from top

port

of valve dipperstick segment to piston end of dipperstick cylinder.

M

from bottom

port

of valve dipperstick segment to rod end of dipperstick

cylinder

stabilizer cylinder

cylinder.

Figure

35.

Plumbing

Schematic

50

PLUMBING SCHEMATIC

PLUMBING

SCHEMATIC (Cont.)

LT. STABILIZER

RT.

STABILIZER

I

1

t+

I

RES

-

=.

FROM

PUMP

NEUTRAL POSITION

m

T

O

RE

S

ERVOIR

OIL FLOW

-

BOOM FLOAT

4

I

TO

RESERVOIR

-

1

G

m

FROM PUMP

*

__

-

SPECIFICATIONS

REACH BELOW GRADE (Standard Bucket)

Maximum

.................

With

two

foot flat bottom trench*

.....

LOADING HEIGHT'

REACH

From center of swing mast pivot point

. .

BUCKET ARC

SWING WORKING ARC

OPERATING PRESSURE

Digging'

.................

Swing'

.....

;

............

STABILIZER SPREAD

BOOM CYLINDER

Bore

...................

Stroke

..................

DIPPERSTICK CYLINDER

Bore

...................

Stroke

..................

Digging Force'

..............

Bore

...................

Stroke

..................

Digging Force

..............

Bore

...................

Stroke

..................

BUCKETCYLINDER

SWING CYLINDER

91.8

"

90ll

68.0

1

12.2

"

175O

180'

2000

psi

2000

psi

52.5

"

-

89.5

"

2.5

"

1

6.75

"

2.0

"

1

6.75

"

2275

Ibs.

2.0

"

1 6.75

"

2600

Ibs.

2.5

"

10.62

"

2332

rnm

2286

rnm

1727

rnm

2845

rnm

13.8

MPa

13.8

MPa

1333

-

2273

mrn

63.5

mm

425.5

rnm

50.8

mm

425.5

rnrn

1032

kg

50.8

rnrn

425.5

mm

1179

kg

63.5

rnm

269.7

mrn

BUCKET CAPACITY

HEAPED

STRUCK

8

Inches

.................

77 ft3.022

m3

.65

ft3

.018

m3

16

Inches

.................

1.71

ft3.048

m3

1.37

ft?

.039

m3

18

Inches

.................

2.02 ft3.057

m3

1.55

ft3.044

m3

12

Inches

.................

1.23

ft?

.035

m3

1.00

fta3

.028

m3

24

Inches

.................

3.32

ft3.094

m3

2.10

fL3

.060

m3

*Per SAE

J49

Standard.

SPECIFICATIONS

SPECIFICATIONS (Cont.)

CENTER

OF

SWING

PIVOT

I

MAXIMUM

REACH

TRAN

S

PORT

HEIGHT

1

~GROUNO LINE

24

in

1524mm

60

in

1829

mm

72

in

-

2134

mm

84

in

53

NOTES

SPECIFICATIONS

54

..

li

INDEX

TO

PARTS

LISTS

INDEX

TO

PARTS

LISTS

MAIN FRAME ASSEMBLY

..............

56

.

57

BACKHOE SUB

-

FRAME

...............

58

.

59

BOOM ASSEMBLY

...................

60

DIPPERSTICK

&

BUCKET ASSEMBLY

........

61

HOSES

&

FITTINGS

...................

62

PUMP

&

TANK ASSEMBLY

............

'

...

63

HYDRAULIC GEAR PUMP ASSEMBLY

........

64

VALVE CONTROLS

&

HARDWARE

..........

65

CONSOLE VALVE ASSEMBLY

.............

66

SWINGCYLINDER

...................

67

BOOM

&

DIPPERSTICK CYLINDER

..........

68

STABILIZER CYLINDER

................

69

BUCKET CYLINDER

..................

70

55

MAIN FRAME ASSEMBLY

DO3453

I

68

56

1

-.

MAIN FRAME ASSEMBLY

Fig

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

35

No.

Used

1

2

1

2

1

2

1

2

Description

Console cover

Right valve bracket assy

Console valve

Left valve bracket asy

Valve mounting plate asy

Frame assembly, main

Cap asy, kingpost

1

-

1/2

ID

Ball bushing

Kingpost weldment assy

Swing lock pin

Bolt,

chain tension

Pivot pin, boom

Guide, hose

Plate, latch

.072

x

.62

Compression spring

Pin, pivot

Pad asy, bumper

Chain, swing

Swing cylinder assy.

(see

page

65

for breakdown)

Clamp, hose

Pin, pivot

Pad assy, stabilizer

Stabilizer assembly

2

x

14

-

1/2

Stabilizer cylinder (see

page

67

for breakdown)

13/16

x

1

-

1/4

x

1

Bushing

Hose clamp

Shield, hose protector

Grommet,.25'x

1

.O

x

1.38

Lower seat support

Seat bracket assy.

Seat

Upper seat suuport

Complete label set

BH6575

Fig

No.

'40

'41

'42

'43

'44

'45

'46

'47

48

49

'50

'51

52

'53

54

55

'56

57

'58

'59

'60

'61

'62

'63

64

'65

'66

'67

'68

'69

70

71

72

73

74

HARDWARE

Description

1/16

x

1/2

Cotter pin

3/32

x

1/2

Cotter pin

3/32

x

1

-

1/2

Cotter pin

3/16

Safety pin

Straight

1/4

tapered thread grease fitting

1/4

-

28

Threaded

90'

grease fitting

1/4

NC

x

3/4

Hex head cap screw

GR5

1/4

x

1

-

1/2

Cotter pin

1/4

x

1

-7/8

Clevis pin

5/16

NC Flanged hex locknut

5/16

Standard flat washer

5/16

Standard lockwasher

5/16

NC

x

3/4

Hex head cap screw

GR5

5/16

NC

x

3/4

Carriage bolt

Pin, chain

8mm

x

1.25mm

Pitch hex nut

3/18

NC Hex nut, plated

3/8

NC Flanged hex locknut

3/8

NC Hex locknut

3/18

Standard lockwasher

3/8

NC

x

3/4

Carriage

bolt

3/8

NC

x

1

Carriage

bolt

3/8

NC

x

3

Hex head cap screw

GR5

7/16

NF Hex locknut

7/16

NF

x

1

-1/4

Wheel

bolt

1/2

NC Hex locknut

1/2

NC

x

4

Hex head cap screw GR5

5/8

NC Hex nut

3/4

NC Hex locknut

3/4

Standard lockwasher

314

NC

x

1

-1/2

Hex head cap screw GR5

3/4

NC

x

6 Hex head cap screw

GR5

13/16

x

.010

Shim washer

10

GA

x

1

-1/2

Washer

.11

x

1.1

OD

Split ring

75

3/16

x

1

Klik pin

76

1/2

x

4

-

1/2

Clevis pin

Obtain Locally

57

BACKHOE SUB

-

FRAME ASSEMBLY

BACKHOE SUB

-

FRAME ASSEMBLY

BACKHOE SUB

-

FRAME ASSEMBLY

BACKHOE SUB

-

FRAME ASSEMBLY

Ref

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Ref

No.

'1

7

'18

'19

'20

'21

'22

'23

'24

'25

'26

'27

'28

'29

'30

'31

N

O

.

Used

1

2

Description

Set plate, right

Set plate,

left

Cross shaft

Honda BH6575 Backhoe

Product's Documents

User Manual

Specifications

Honda BH6575 Questions and Answers