Visit our website at: https://www.harborfreight.com
email our technical support at: [email protected]
email our engine support at: [email protected]
WarninG!
iMpOrTanT inFOrMaTiOn
The Hitch Coupler MUST be properly secured to the hitch ball of the
towing vehicle. After assembly and attachment, pull up and down on
the Hitch Coupler to make sure the hitch ball is fitting snugly in the
Hitch Coupler. There must be no play between the hitch ball and
Hitch Coupler. If there is play, tighten the Adjustment Nut until no play
is present. If the Adjustment Nut is too tight, the Handle will not lock.
Carefully read and follow the complete instructions in this manual
BeFOre setup or use.
if the Coupler is not secured properly, the ball could come
loose while the Backhoe is in motion, possibly causing
property damage, SeriOuS perSOnaL inJury, or DeaTH.
59703
8HP
TOWABLE BACKHOE
using an engine indoors
Can KiLL yOu in MinuTeS.
engine exhaust contains carbon monoxide.
This is a poison you cannot see or smell.
neVer use inside a
home or garage, eVen
iF doors and windows
are open.
Only use OuTSiDe
and far away from
windows, doors,
and vents.
301 cc
PREDATOR
®
ENGINE
POWERED BY
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual (or month and year of purchase if product has no number). Keep this manual and the
receipt in a safe and dry place for future reference. 24k
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright
©
2023 by Harbor Freight Tools
®
. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
read this material before using this product.
Failure to do so can result in serious injury.
SaVe THiS ManuaL.
Page 2 For technical questions, please call 1-888-866-5797. Item 59703
Table of Contents
Specifications ............................................................... 2
Safety ...........................................................................3
Setup ............................................................................6
Operation .....................................................................18
Maintenance ................................................................ 25
Troubleshooting ........................................................... 30
Parts Lists and Diagrams ............................................ 32
Warranties ................................................................... 37
Specifications
Displacement 301cc
Engine Type
Horizontal Single Cylinder
4-stroke, OHV, 8 HP, Recoil Start
Cooling System Forced air cooled
Fuel
Type 87+ octane unleaded gasoline
Capacity 1.41 Gallon
Engine Oil
Type SAE
10W-30 above 32° F
5W-30 at 32° F or below
Capacity 1 Quart
Run Time @ 50% Load
with full tank
3 hours
Sound Level 106 dB
Bore x Stroke 80 mm x 60 mm
Compression Ratio 8.2:1
Rotation viewed from PTO
(power takeoff - the output shaft)
Counterclockwise
Shaft Shaft 1" x 3.48"
Keyway 1/4" (6.3 mm)
End Tapped 7/16 – 20
Spark Plug
Type F6TC (Torch / LG)
Gap 0.7– 0.8 mm
Valve Clearance
Intake 0.002" ~ 0.004"
Exhaust 0.002" ~ 0.004"
Speed
Idle 1600 ± 300 RPM
Maximum 3900 RPM
Hydraulic Oil 3 Gallons
Wheel Size 4.8 –12
Tire Size 20"
Tire Inflation 60 PSI maximum
Digging Depth 5 and 6 Feet Deep
Maximum Digging Reach 8 Feet
Maximum Lifting Height 4 Feet
Boom Travel 60° Left/Right
Bucket Load Capacity 660 lb
Pump Rated 2.7 GPM
Hitch Ball size 2" Diameter
Weight 1077 lb
The emissions control system for this product’s Engine is warranted for standards set by the
U.S. Environmental Protection Agency. For warranty information, refer to the last pages of this manual.
Page 3For technical questions, please call 1-888-866-5797.Item 59703
SaFeTySeTupOperaTiOnMainTenanCe
WarninG SyMBOLS anD DeFiniTiOnS
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that
follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
Symbol Definitions
Symbol property or Statement
rpM
Revolutions Per Minute
Hp
Horsepower
WARNING marking concerning
Risk of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
Read the manual before
set-up and/or use.
WARNING marking concerning
Risk of Hearing Loss.
Wear hearing protection.
Symbol property or Statement
WARNING marking concerning
Risk of Respiratory Injury.
Operate engine OUTSIDE and far away
from windows, doors, and vents.
WARNING marking concerning
Risk of Fire while handling fuel.
Do not smoke while handling fuel.
WARNING marking concerning
Risk of Fire.
Do not refuel while operating.
Keep flammable objects
away from engine.
iMpOrTanT SaFeTy inSTruCTiOnS
WarninG! read all instructions.
Failure to follow all instructions listed below may result in fire, serious injury and/or DeaTH.
The warnings and precautions discussed in this manual cannot cover all possible conditions and
situations that may occur. It must be understood by the operator that common sense and caution
are factors which cannot be built into this product, but must be supplied by the operator.
SaVe THeSe inSTruCTiOnS
Set up precautions
1. Gasoline fuel and fumes are flammable, and
potentially explosive. Use proper fuel storage
and handling procedures. Do not store fuel
or other flammable materials nearby.
2. Have multiple ABC class fire extinguishers nearby.
3. This equipment has a spark arresting muffler
included. A spark arresting muffler is required
by law in California, on some US Forest Service
land, and possibly in other areas or situations.
4. Set up and use only on a flat, level,
well-ventilated surface.
5. Wear ANSI-approved safety goggles, heavy-duty
work gloves, and dust mask/respirator during set up.
6. Use only lubricants and fuel recommended
in the Specifications chart of this manual.
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SaFeTy SeTup OperaTiOn MainTenanCe
Operating precautions
1. CarBOn MOnOXiDe HaZarD
using an engine indoors
Can KiLL yOu in MinuTeS.
Engine exhaust contains
carbon monoxide. This is a poison
you cannot see or smell.
NEVER use inside a home or garage,
EVEN IF doors and windows are open.
Only use OUTSIDE and far away from windows,
doors, and vents.
2. Contact local utility companies before
beginning any project. Buried utility lines
may not be marked and, if struck, can cause
SERIOUS PERSONAL INJURY or DEATH.
3. Keep children away from the equipment,
especially while it is operating.
4. Keep all spectators at least 20 feet from
the equipment during operation.
5. Fire Hazard! Do not fill fuel tank while engine is
running. Do not operate if gasoline has been spilled.
Clean spilled gasoline before starting engine.
Do not operate near pilot light or open flame.
6. Do not touch engine during use.
Let engine cool down after use.
7. Never store fuel or other flammable
materials near the engine.
8. Industrial applications must follow
OSHA requirements.
9. Do not leave the equipment unattended when it is
running. Turn off the equipment (and remove safety
keys, if available) before leaving the work area.
10. The equipment can produce high noise levels.
Prolonged exposure to noise levels
above 85 dBA is hazardous to hearing.
Wear ear protection when operating the equipment
or when working nearby while it is operating.
11. Wear ANSI-approved safety goggles
and hearing protection during use.
12. Do not operate in explosive atmospheres,
such as in the presence of flammable
liquids, gases, or dust. Gasoline-powered
engines may ignite the dust or fumes.
13. People with pacemakers should consult their
physician(s) before use. Electromagnetic fields in
close proximity to a heart pacemaker could cause
pacemaker interference or pacemaker failure.
Caution is necessary when near the
engine’s magneto or recoil starter.
14. Use only accessories that are recommended
by Harbor Freight Tools for your model.
Accessories that may be suitable for one
piece of equipment may become hazardous
when used on another piece of equipment.
15. Stay alert, watch what you are doing and use
common sense when operating this piece of
equipment. Do not use while tired or under the
influence of drugs, alcohol or medication.
16. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the equipment in unexpected situations.
17. Use this equipment with both hands only.
Using equipment with only one hand
can easily result in loss of control.
18. Dress properly. Do not wear loose clothing or
jewelry. Keep hair, clothing and gloves away
from moving parts. Loose clothes, jewelry or
long hair can be caught in moving parts.
19. Parts, especially exhaust system components,
get very hot during use. Stay clear of hot parts.
20. Do not cover the engine or
equipment during operation.
21. Keep the equipment, engine, and
surrounding area clean at all times.
22. Use the equipment, accessories, etc., in
accordance with these instructions and in the
manner intended for the particular type of
equipment, taking into account the working
conditions and the work to be performed.
Use of the equipment for operations different from
those intended could result in a hazardous situation.
23. Do not operate the equipment with known
leaks in the engine’s fuel system.
24. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
25. Never place your hands or body near a hydraulic
fluid leak. High-pressure fluid can be forced
under the skin resulting in serious injury.
26. When spills of fuel or oil occur, they must be
cleaned up immediately. Dispose of fluids and
cleaning materials as per any local, state, or
federal codes and regulations. Store oil rags in
a bottom-ventilated, covered, metal container.
27. Keep hands and feet away from moving parts.
Do not reach over or across
equipment while operating.
Page 5For technical questions, please call 1-888-866-5797.Item 59703
SaFeTySeTupOperaTiOnMainTenanCe
28. Before use, check for misalignment or binding of
moving parts, breakage of parts, and any other
condition that may affect the equipment’s operation.
if damaged, have the equipment serviced
before using. Many accidents are caused
by poorly maintained equipment.
29. Use the correct equipment for the application.
Do not modify the equipment and do not use the
equipment for a purpose for which it is not intended.
Transport precautions
1. Only use a suitable means of transport and
lifting devices with sufficient weight bearing
capacity when transporting the equipment.
2. Properly secure the equipment to transport vehicle
to prevent it from rolling, slipping, and tilting.
3. Always make sure the hitch coupler is securely fixed
to the vehicle before moving it. If the Coupler is not
se cured properly, the link could come loose while
the trailer is in motion, possibly causing property
damage, SERIOUS PERSONAL INJURY, or DEATH.
4. Do not exceed 30 MPH when towing the Backhoe.
5. Do not tow the Backhoe on roads or
highways. This product is not D.O.T.
compliant, and is not road legal.
Service precautions
1. Before service, maintenance, or cleaning:
a. Turn the engine switch to its “OFF” position.
b. allow the engine to completely cool.
c. Then, remove the spark plug wire
from the spark plug.
2. Keep all safety guards in place and in
proper working order. Safety guards include
muffler, air cleaner, mechanical guards,
and heat shields, among other guards.
3. Do not alter or adjust any part of the
equipment or its engine that is sealed by the
manufacturer or distributor. Only a qualified
service technician may adjust parts that may
increase or decrease governed engine speed.
4. Wear ANSI-approved safety goggles,
heavy-duty work gloves, and
dust mask/respirator during service.
5. Do not allow the hydraulic hose to come in
contact with any hot part of the unit. The
hose might be damaged, possibly causing
it to burst or leak under high pressure.
6. Maintain labels and nameplates on the equipment.
These carry important information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
7. Have the equipment serviced by a qualified repair
person using only identical replacement parts.
This will ensure that the safety of the equipment
is maintained. Do not attempt any service or
maintenance procedures not explained in this
manual or any procedures that you are uncertain
about your ability to perform safely or correctly.
8. Store equipment out of the reach of children.
9. Follow scheduled engine and
equipment maintenance.
refueling:
1. Do not refill the fuel tank while the
engine is running or hot.
2. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
3. Do not fill fuel tank to the top.
Leave a little room for the fuel to expand as needed.
TO preVenT FueL LeaKaGe anD
Fire HaZarD, do not fill fuel above
the bottom of fuel strainer.
Max Fuel
DO nOT OVerFiLL!
4. Refuel in a well-ventilated area only.
5. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent Fire, do not start the engine
while the smell of fuel hangs in the air.
SaVe THeSe inSTruCTiOnS.
Operating precautions (continued)
Page 6 For technical questions, please call 1-888-866-5797. Item 59703
SaFeTy SeTup OperaTiOn MainTenanCe
Set up
read the enTire iMpOrTanT SaFeTy inFOrMaTiOn section at the beginning of this manual
including all text under subheadings therein before set up or use of this product.
riSK OF aCCiDenTaL STarTinG reSuLTinG in SeriOuS perSOnaL inJury.
Turn the power Switch of the equipment to its “OFF” position, wait for the engine to cool, and
unplug the spark plug wire(s) before assembling or making any adjustments to the equipment.
The preparation and assembly of this equipment requires specific, specialized skill and
knowledge. if you are uncertain about your ability to perform any procedures in this
manual safely or correctly have the work performed by a qualified mechanic.
At high altitudes, the engine’s carburetor, governor (if so equipped), and any other parts that control
the fuel-air ratio will need to be adjusted by a qualified mechanic to allow efficient high-altitude
use and to prevent damage to the engine and any other devices used with this product.
note: For additional information regarding the parts listed in the following pages,
refer to the Assembly Diagram near the end of this manual.
assembly
1. This equipment has a spark arresting muffler.
A spark arresting muffler is required by law in
California, on some US Forest Service land,
and possibly in other areas or situations.
2. Due to the size of the Backhoe and its
components, assistance may be required
during the entire assembly process.
nOTe: The Backhoe arrives in a large shipping
crate that will take multiple people and heavy
equipment to move and position.
3. Carefully unpack all components except the Frame
Assembly / Engine / Pump (90) and lay them out in
an orderly manner. Take note of the component
part numbers as you remove the shrink wrap.
4. Use a hoist or other certified lifting
equipment to carefully remove the
Frame Assembly from the crate.
5. Once the Frame Assembly is on the ground,
use floor jacks (not included) to evenly raise the
Assembly to a point where it can be supported on
all four corners with jack stands (not included).
nOTe: The Hydraulics of this unit are tested
before shipment. There may be hydraulic fluid
present in components. Assemble the unit in
an area that will not be damaged by leaking
hydraulic fluid. It is recommended that you wrap
rags securely over the Hydraulic Connectors on
all the Cylinders during assembly. Wear splash-
resistant ANSI approved safety goggles and other
protective gear to prevent injury from leaking fluid.
Backhoe in Shipping Crate
Page 7For technical questions, please call 1-888-866-5797.Item 59703
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Wheel assembly
1. The wheel hubs are mounted to the wheels
from the factory. Remove the axle end
caps from the Wheel / Tire Assemblies (52)
to access the Spindle Nut and Washer.
2. Mount a Wheel / Tire Assembly over the spindle
on the end of each Axle (50), making sure the
axle bearings are well seated. The axle ends
should protrude past the ends of the wheel hubs.
3. Install the Washers, then screw a Spindle
Nut (53) tightly onto each spindle. Back
the Spindle Nuts off slightly so that
the Wheels can just move freely.
4. Insert a Cotter Pin (51) through the Spindle
Nut and hole at the end of each spindle.
Bend the Cotter Pin back, locking it and the
Nut in place. Replace the axle end caps.
5. Mount both Wheel / Axle Assemblies onto
the Frame Assembly (90) with retention pin
holes in Axles aligned vertically. Align holes
in Axles and Frame and insert No. 2 Lock
Pins (82). Secure Pins with R-Clips (16).
6. Inflate the Tires to 60 PSI maximum.
7. Slightly raise the end of the Frame Assembly with
the Wheel / Axle Assemblies using a floor jack.
Remove the jack stands, then lower the jack. Block
the Tires and tighten the Lug Nuts to at least 90 ft-lb.
90
82
16
50
52
axle
end Cap
Page 8 For technical questions, please call 1-888-866-5797. Item 59703
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attaching the Leg assemblies
1. Insert the right Extension Leg (19) into the
Frame Assembly. Direct the Extension
Leg so it turns toward the Bucket end of
the Backhoe (away from the Engine).
2. Align holes in Extension Leg and Frame
and insert a Safety Locking Pin (15).
Secure Pin with R-Clip (16).
3. Insert the left Extension Leg (45) into the
Frame Assembly. Direct the Extension
Leg so it turns toward the Bucket end of
the Backhoe (away from the Engine).
4. Align holes in Extension Leg and Frame
and insert a Safety Locking Pin (15).
Secure Locking Pin with R-Clip (16).
5. Insert a Leg Assembly (24) into the right Extension
Leg, directing it away from the Engine.
6. Align holes in Extension Leg and Leg
Assembly and insert a No.1 Lock Pin (20).
Secure Lock Pin with R-Clip (16).
7. Repeat procedure for the left side Extension Leg.
20
19
16
24
24
45
15
15
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Main Boom installation
1. Lay the Main Boom (36) on the
ground at the front end (opposite
Engine) of the Frame Assembly.
2. Using a floor jack, lift the Main Boom
until the pivot hole aligns with the
bottom hole of the Boom Pivot (38).
3. Insert a Pin (42) through the bottom
hole and secure in place with two Cotter
Pins (31), one on each end of Pin.
31
38
31
36
4242
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Boom extension assembly
Use a work table to provide adequate support for the Main Boom (36) and keep it balanced.
1. Bring the Boom Extension Assembly (34)
to the end of the Main Boom.
2. Lift the Boom Extension
Assembly up and align the
bottom hole with the hole in the
square tube of the Main Boom.
3. Insert a Pin (42) through the
bottom hole and secure in place
with two Cotter Pins (31), one
on each end of Pin.
36
34
31
4242
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Control panel installation
1. Place the Control Panel (3) on the Frame
Assembly (90) and align the holes in the Panel
with the mounting holes in the Frame.
2. Fasten the Control Panel in place using four sets
of 3/8" Spring Washers (2), 3/8" Washers (4), and
3/8" x 1-1/8" Hex Bolts (5). Tighten securely.
3
2, 4, 5
90
3. Pull Hydraulic Hoses (part numbers 17,18, 21, 22, 39, and 40) through
the Hose Retaining Ring (94) to prepare for hose connection.
9494
17, 18, 21, 17, 18, 21,
22, 39, 4022, 39, 40
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SaFeTy SeTup OperaTiOn MainTenanCe
Front Hydraulic Hose Connections
1. Each Hydraulic Hose is numbered with labels which
correspond to numbered Hydraulic Fittings on the
Main Boom Cylinder, Boom Extension Cylinder,
Bucket Control Cylinder, and Control Panel.
2. Connect each numbered Hose to the
matching numbered Fittings – number 2 to
number 2, number 3 to number 3, etc.
3. Wrench-tighten all connections.
2
8
3
9
4
7
Hose Connections – Front
Boom extension
Cylinder
Bucket
Control
Cylinder
Main Boom
Cylinder
Boom Swing
Cylinder
Control panel
/ Spool Valve
Hydraulic
pump
2
8
10
4
9
3
5
1
6
7
Hose Connection Diagram
Hoses and Fittings have
Laser-printed numbers
5 4 3 2
10
9 8 76 1
VieW OF COnTrOL paneL
FrOM unDerneaTH
Hydraulic Fluid
reservoir
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SaFeTySeTupOperaTiOnMainTenanCe
rear Hydraulic Hose Connections / Filling Hydraulic reservoir
1. Each Hydraulic Hose is numbered with labels
which correspond to numbered Hydraulic
Fittings on the Boom Swing Cylinder, Hydraulic
Fluid Filter, Pump and Control Panel.
2. Connect each numbered Hose to the
matching numbered Fittings – number 1 to
number 1, number 5 to number 5, etc.
3. Wrench-tighten all connections.
4. Open the Hydraulic Fluid Fill Plug / Dipstick on
the Hydraulic Fluid Reservoir. Fill the Reservoir
with high quality hydraulic fluid. Check that the
fluid level is between the Min / Max lines on the
attached Dipstick. For safe operation the fluid
level must not be below the minimum line.
note: The Fill Plug is vented. When tightening the
Fill Plug, tighten it securely, then back it off slightly.
Control panel
6
1
5
10
Hose Connections – Rear
6
1
5
10
Min / Max Lines
Hydraulic
reservoir
Hydraulic Fluid
Fill Plug /Dipstick
Page 14 For technical questions, please call 1-888-866-5797. Item 59703
SaFeTy SeTup OperaTiOn MainTenanCe
attach Hydraulic Cylinders
WarninG! TO preVenT SeriOuS inJury: if you are uncertain about your ability to perform
the following procedures safely or correctly have the work performed by a qualified mechanic.
1. Prepare the Engine for use. Refer to
Pre-Start Checks on page 18.
2. Start the Engine following the instructions
in Starting the Engine on page 18.
3. Use the Main Boom Control Lever to move the Main
Boom Cylinder backward to the Boom Pivot (38).
Refer to Operating Controls on next page.
4. Insert a Clevis Pin (35) through the hole in the
Boom Pivot and the Cylinder bracket. Secure
Clevis Pin in place with a Cotter Pin (31).
Main Boom
Cylinder
38
35
35
31
31
5. Use the Boom Extension Control Lever
to move the Boom Extension Cylinder
forward to the Boom Extension (34). Refer
to Operating Controls on next page.
6. Insert a Clevis Pin (35) through the hole in the
Boom Extension and the Cylinder bracket. Secure
Clevis Pin in place with a Cotter Pin (31).
34
35
35
31
31
Boom extension
Cylinder
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7. Use the Bucket Control Lever to move
the Bucket Control Cylinder forward
to the Bucket Assembly (32). Refer
to Operating Controls below.
8. Use a Clevis Pin (29) to connect the Short
and Long Connecting Rods (27, 28) and
the Cylinder rod bracket together. Secure
Clevis Pin in place with a Cotter Pin (31).
9. Turn off Engine.
29
31
32
28
2727
Bucket Control
Cylinder
Main Boom:
in
–
OuT
Bucket:
in
–
OuT
Boom Boom
extension: extension:
inin
–
OuTOuT
Boom Swing:
LeFT
–
riGHT
Operating Controls
attach Seat and Hitch Coupler
1. Attach Seat (73) to the Seat Bottom Plate (10)
using four 5/16" Spring Washers (12), four 5/16"
Washers (63), and four 5/16" x 1-1/8" Hex Bolts (86).
2. Secure both Seat and Plate to the post on top of
the Hydraulic Reservoir (part of Frame Assembly).
10
73
8686
12
Hydraulic
reservoir
6363
3. Align the holes in the Hitch Coupler (58)
with the mounting holes in the Frame
Assembly (90) under the Engine (74).
4. Attach the Coupler using two 3/8" x 2-3/4" Hex
Bolts (60) and two 3/8" Nuts (57). Tighten securely.
58
90
60
57
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attach Thumb assembly
1. Arrange and secure the front end Hydraulic Hoses
in the Hose Brackets on the Main Boom (36).
2. Attach the end of the Thumb Support
Bar (101) to the large bracket on the Boom
Extension (34) with a Clevis Pin (102). Secure
Clevis Pin in place with R-Clip (98).
3. Attach the end of the Thumb (99) to the small
bracket on the Boom Extension with a Clevis
Pin (91). Secure Clevis Pin in place with
R-Clip (98).
36
34
Hose
Brackets
Large
Large
Bracket
Bracket
101
99
102, 98
102, 98
91, 98
91, 98
purging the Hydraulic System
Before first time use after assembly, purge
Hydraulic System of air as follows:
1. Remove Safety Locking Pins (15) and disengage
Safety Latch (41). Refer to Transporting the
Backhoe on page 23 for Safety Pin and Latch
locations. Loosen Hydraulic Tank Fill Plug (11).
2. Start the Engine. Refer to Starting
the Engine on page 18.
3. Press forward on the Boom Swing Control Lever
(located on Control Panel) until the Boom stops
moving, then pull back on it until it moves in the other
direction. Center the Boom. Repeat 3 – 4 times.
4. Press forward on the Main Boom Control Lever
until the Main Boom is fully raised. Then, press
Forward on the Boom Extension Control Lever until
the Boom is fully extended. Repeat 3 – 4 times.
5. Press forward on the Bucket Control Lever until
the Bucket is fully extended. Pull back on the
Lever to retract it fully. Repeat 3 – 4 times.
6. Pull back on the Boom Extension Control Lever
until the Boom is pulled back all the way. Pull back
on the Main Boom Control Lever until the Main
Boom is lowered completely. Repeat 3 – 4 times.
7. Adjust the Boom back to its rest position
and replace all locking devices.
8. Shut off the Engine, check the Hydraulic
Fluid level and refill as necessary.
note: The Fill Plug is vented. When tightening the
Fill Plug, tighten it securely, then back it off slightly.
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Components and Controls
Bucket assembly
axles
Seat
Main Boom
Frame Assembly /
Engine / Pump
Tires
Leg extensions
Leg assemblies
Control
panel
Spindle nuts
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SaFeTy SeTup OperaTiOn MainTenanCe
Operation
read the enTire iMpOrTanT SaFeTy inFOrMaTiOn section at the beginning of this manual
including all text under subheadings therein before set up or use of this product.
pre-Start Checks
Inspect engine and equipment looking for damaged, loose, and missing parts before set up and starting.
If any problems are found, do not use equipment until fixed properly.
Checking and Filling engine Oil
nOTiCe: your Warranty is VOiD if the engine’s crankcase is not properly filled with oil before
each use. Before each use, check the oil level. engine will not start with low or no engine oil.
1. Make sure the engine is stopped and is level.
2. Close the Fuel Valve.
3. Clean the top of the Dipstick and the area around it.
Remove the Dipstick by turning it counterclockwise,
and wipe it off with a clean, lint free rag.
4. Reinsert the Dipstick without threading it in and
remove it to check the oil level. The oil level should
be up to the full level as shown in Figure A:.
5. If the oil level is at or below the low mark add the
appropriate type of oil until the oil level is at the
proper level. SAE 10W-30 oil is recommended for
general use. The SAE Viscosity Grade chart on
page 27 in the Maintenance section shows other
viscosities to use in different average temperatures.
Full level
Full level
Figure a:
6. Thread the dipstick back in clockwise.
nOTiCe: Do not run the engine with too little oil.
engine will shut off if engine oil level is too low.
Checking and Filling Fuel
WarninG! TO preVenT SeriOuS
inJury FrOM Fire:
Fill the fuel tank in a well-ventilated area
away from ignition sources. If the engine
is hot from use, shut the engine off and
wait for it to cool before adding fuel. Do not smoke.
1. Clean the Fuel Cap and the area around it.
2. Unscrew and remove the Fuel Cap.
3. Remove the Strainer and remove any dirt
and debris. Then replace the Strainer.
note: Do not use gasoline containing more than
10% ethanol (e10). Do not use e85 ethanol. add fuel
stabilizer to the gasoline or the Warranty is VOiD.
note: Do not use gasoline that has been stored in a
metal fuel container or a dirty fuel container. it can
cause particles to enter the carburetor, affecting
engine performance and/or causing damage.
4. If needed, fill the Fuel Tank to about 1 inch under
the fill neck of the Fuel Tank with 87 octane or
higher unleaded gasoline that has been treated
with a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use.
5. Then replace the Fuel Cap.
6. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent FIRE, do not start the engine
while the smell of fuel hangs in the air.
Starting the engine
Before Starting the engine
Before starting the engine:
a. Follow the Set up instructions to prepare the equipment.
b. inspect the equipment and engine.
c. Fill the engine with the proper amount and type of
both stabilizer-treated unleaded gasoline and oil.
d. read the equipment Operation section that follows.
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engine Components
Fuel
Valve
Choke
Throttle
air
Filter
recoil
Starter
Starter
Handle
Fuel
Cap
Muffler
engine
Switch
Fuel Tank
Oil Drain
plug
Dipstick / Oil
Fill Cap
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Manual Start
1. Turn the Fuel Valve Lever to its “OPEN” position.
2. Turn the Ignition Switch to its ON or RUN position.
note: If engine does not start,
check engine oil level. Engine
will not start with low or no engine oil.
3. Then, turn the engine Choke Lever to its “START”
position. Set the Choke Lever in the “RUN” position
when starting a warm engine.
4. Grip the Starter Handle of the Engine loosely and pull it
slowly several times to allow the gasoline to flow into
the Engine’s carburetor. Then pull the Starter Handle
gently until resistance is felt. Allow Cable to retract fully
and then pull it quickly. Repeat until the engine starts.
note: Do not let the Starter Handle snap back against
the engine. Hold it as it recoils so it doesn’t hit the engine.
5. Allow the Engine to run for several seconds.
Then, if the Choke Lever is in the START position,
move the Choke Lever very slowly to its RUN position.
note: Moving the Choke Lever too
fast could stall the engine.
1
On
OFF
O
i
On
2
START RUN
3
4
START RUN
5
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Stopping the engine
1. To stop the engine in an emergency,
turn the Engine Switch off.
2. Under normal conditions, use the following procedure:
a. Turn the Engine Switch off.
b. Close the Fuel Valve.
NOTICE
See Long-Term Storage on page 29 for complete storage instructions.
O
i
OFF
6. Slide the Throttle or Speed Control Lever to 1/3 away
from the SLOW position (the “turtle”). Adjust as needed.
note: Some tools have a Speed Control Lever located
elsewhere on the tool which functions the same as
the Throttle. Use the Speed Control Lever in place
of the Throttle when the tool is so equipped.
iMpOrTanT: Allow the engine to run at no load for five minutes
after each start-up so that the engine can stabilize.
Break-in period:
a. Breaking-in the engine will help to ensure proper equipment and engine operation.
b. The operational break-in period will last about 3 hours of use. During this period:
• Do not apply a heavy load to the equipment.
• Do not operate the engine at its maximum speed.
c. The maintenance break-in period will last about 20 hours of use.
• Change the engine oil after this period.
Under normal operating conditions subsequent maintenance follows
the schedule explained in the MAINTENANCE section.
6
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Changing Backhoe arm positions
The Backhoe can be used with either of two arm positions, shallow or deep. Refer to illustrations below.
Hydraulic
Cylinder
Boom
pivot
Main
Boom
Clevis
pin in
lower
hole
Hydraulic
Cylinder
Boom
pivot
Main
Boom
Clevis
pin in
upper
hole
Shallow Position – 5 1/2' downward reach Deep Position – 7' downward reach
1. To use the Shallow Position, with a
5 1/2' downward reach, do as follows:
a. With the end of the Main Boom supported,
remove the Cotter Pin (31) securing the
Clevis Pin (35) and remove Clevis Pin.
b. Align the Hydraulic Cylinder with the
upper hole in the Boom Pivot.
c. Insert the Clevis Pin in the upper hole
and secure it with the Cotter Pin.
2. To use the Deep Position, with a
7' downward reach, do as follows:
a. With the end of the Main Boom supported,
remove the Cotter Pin (31) securing the
Clevis Pin (35) and remove Clevis Pin.
b. Align the Hydraulic Cylinder with the
lower hole in the Boom Pivot.
c. Insert the Clevis Pin in the lower hole
and secure it with the Cotter Pin.
General Operating instructions
1. With the Engine running, sit in the Operator
Seat and pull the Main Boom Control Lever
backward to raise the Main Boom.
Main Boom:
in
–
OuT
Bucket:
in
–
OuT
Boom Boom
extension: extension:
inin
–
OuTOuT
Boom Swing:
LeFT
–
riGHT
Operating
Controls
2. Pull back on the Boom Extension Control
Lever to raise the Boom Extension.
3. Push forward on the Bucket Control
Lever to open the Bucket Assembly.
4. Push forward on the Main Boom Control Lever to
lower the Boom until the Bucket reaches the ground.
5. Pull back on the Bucket Control Lever
until the Bucket scoops up the dirt.
6. Pull back on both the Main Boom and Boom
Extension Control Levers to raise the load.
7. Press in, or push out, the Boom Swing Control
Lever to move the Bucket left or right.
note: The Boom’s travel is 60 degrees
left and 60 degrees right.
8. Press in on the Bucket Control
Lever to dump the load.
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Moving the Backhoe
1. One method for moving the Backhoe around
the work area is by using the Boom to
push the Backhoe across the ground.
WarninG! TO preVenT SeriOuS inJury:
This technique can be difficult to control and should
only be attempted by an experienced operator.
The stability of the Backhoe is dependent on the
stability of the ground; if you choose to move the
Backhoe in this way, do so at your own risk. Do
not use the Backhoe near ditches or drop-offs.
2. Swing the Bucket inward so that the front of
the Bucket, not the scoop, is facing downward.
Press the Bucket down onto a solid piece
of ground and press down hard enough to
raise the Leg Assemblies off the ground.
3. Carefully operate the controls to move the Boom
and slowly roll yourself in the desired direction. Be
certain that the Tires and the new resting places
for the Legs all remain on solid, stable ground.
4. After you have repositioned the Backhoe,
raise the Boom to lower the Leg Assemblies
back onto the ground. The procedure
can be repeated to move farther.
Transporting the Backhoe
nOTiCe: Do not tow the Backhoe on roads or highways. This product is not D.O.T. compliant, and is not road legal.
1. To tow the Backhoe, the Leg Assemblies
must be removed and the Wheel / Axle
Assemblies must be installed next to the
Boom (end of Frame opposite the Engine).
2. Use floor jacks (not included) to evenly raise
the Backhoe to a point where the Wheel
Assemblies and Leg Assemblies are clear of
the ground and unit can be supported on all
four corners with jack stands (not included).
3. Remove Leg Assemblies from Frame and
secure in storage locations with Safety Locking
Pins (15). Secure Pins with R-Clips (16). Remove
Wheel / Axle Assemblies from rear of Frame.
4. Mount both Wheel / Axle Assemblies onto the Frame
with retention pin holes in Axles aligned vertically.
Align holes in Axles and Frame and insert No. 2
Lock Pins (82). Secure Pins with R-Clips (16).
5. Slightly raise the Backhoe using floor jacks.
Remove the jack stands, then lower the
jacks until unit is resting on the ground.
6. With Engine running, use the Bucket Control Lever
to line up the hole on the Bucket (32) with the
hole on the Boom Extension (34). Insert a Safety
Locking Pin (15) and secure with a Ball Pin.
7. Use the Boom Swing Control Lever to line
up the hole in the Boom Pivot (38) with the
Hole in the Frame. Insert a Safety Locking
Pin (15) and secure with a Ball Pin.
8. Put the Boom into the Deep Position and raise
it until the Pin on the side of the Main Boom (36)
is close enough for the Safety Latch (41) to
swing over it. To use the Safety Latch, pull
out on the handle, swing it over the Pin, and
lower it over the Pin, locking it in place.
9. Turn off Engine.
41
1515
1515
3232
3434
3838
3636
Leg
assembly
Leg
assembly
Leg assembly storage location
(both sides of frame)
Towing
Configuration
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10. When transporting the Backhoe, make sure
your hitch (not included) is compatible with
the Hitch Coupler. The Hitch Coupler will only
accept a 2 inch hitch ball. Follow all safety
warnings for towing in your vehicle’s manual.
11. To reduce friction between the hitch ball
and Hitch Coupler, apply a layer of heavy-
weight grease over the hitch ball.
12. Unlock the Coupler Trigger by removing its
R-Clip and Locking Pin. Then, pull up on
the Trigger and lift up on the Handle.
Hitch
Coupler
Locking
pin
r-Clip
remove r-Clip and Locking pin
13. With assistance, place the Hitch Coupler
over the towing vehicle’s hitch ball, pull
back on the Trigger and push down on the
Handle until the Trigger locks in the slot.
Hitch Ball
(not included)
Handle
Trigger
adjustment
nut
Hitch Ball Connection
14. Pull up and down on the Coupler to make sure the
hitch ball is fitting snugly in the Coupler. There
should be no play between the hitch ball and
Coupler. If there is play, tighten the Adjustment
Nut until no play is present. If the Adjustment
Nut is too tight, the Handle will not lock.
WarninG! If the Hitch Coupler is not secured
properly, the ball could come loose while the
Backhoe is in motion, possibly causing property
damage or SERIOUS PERSONAL INJURY.
15. Attach the Safety Chain to the towing vehicle’s rear
bumper or frame with equal length on each side.
Allow just enough chain length for unrestricted
turning without dragging chain on the ground.
Safety Chain
CauTiOn! Care must be taken when backing
up the Backhoe. Only back up the Backhoe
on a straight path. If the Backhoe is allowed to
turn off the straight path while backing up, the
Backhoe could jackknife, causing severe damage
to the Backhoe and to the towing vehicle.
16. To prevent accidents, turn off the Engine, wait for
it to cool, and disconnect its spark plug wire after
use. Clean external parts with clean cloth, then
store the equipment out of children’s reach.
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Maintenance
WarninG
TO preVenT SeriOuS inJury FrOM aCCiDenTaL STarTinG:
Turn the power Switch of the equipment to its “OFF” position, wait for the engine to cool, and disconnect
the spark plug cap before performing any inspection, maintenance, or cleaning procedures.
TO preVenT SeriOuS inJury FrOM eQuipMenT FaiLure:
Do not use damaged equipment. if abnormal noise, vibration, or excess
smoking occurs, have the problem corrected before further use.
Follow all service instructions in this manual. The engine may fail critically if not serviced properly.
Many maintenance procedures, including any not detailed in this manual, will need to be performed
by a qualified technician for safety. if you have any doubts about your ability to safely service the
equipment or engine, have a qualified technician service the equipment instead.
Cleaning, Maintenance, and Lubrication Schedule
note: This maintenance schedule is intended solely as a general guide. If performance decreases or if
equipment operates unusually, check systems immediately. The maintenance needs of each piece of equipment
will differ depending on factors such as duty cycle, temperature, air quality, fuel quality, and other factors.
note: The following procedures are in addition to the regular checks and maintenance
explained as part of the regular operation of the engine and equipment.
procedure
Before
each use
after 20
Operation
Hour
Break-in
period
Monthly or
every 25
hr. of use
every 3
mo. or 50
hr. of use
every 6 mo. or
100 hr. of use
yearly or
every 300
hr. of use
periodically
Brush off outside of engine
Check engine oil level
Check air cleaner
Check deposit cup
Change engine oil
Clean/replace air filter
* * * * *
Check and clean spark plug
Blow out water filters
Replace fuel Filter
Replace spark plug
1. Clean fuel tank, strainer
and carburetor
2. Clean carbon build-up
from combustion chamber
** **
Apply grease to boom
axis-movement points
(see Lubrication Points
on page 26)
Replace fuel line if necessary
**
*Service more frequently when used in dusty areas.
**These items should be serviced by a qualified technician.
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Lubrication points
17, 18: On both sides
of Hubs, behind Tires
12
13, 14: at ends
of Main Boom
15, 16: On back
of Boom pivot
1
11
10
9
8
2
7
6
5
4
3
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purging the Hydraulic System
1. Remove all Safety Locking Pins (15) and disengage
Safety Latch (41). Refer to Transporting the
Backhoe on page 23 for Safety Pin and Latch
locations. Loosen Hydraulic Tank Fill Plug (11).
2. Start the Engine. Refer to Starting
the Engine on page 18.
3. Press forward on the Boom Swing Control
Lever (located on Control Panel) until the Boom
stops moving, then pull back on it until it moves
in the other direction. Center the Boom.
4. Press forward on the Main Boom Control Lever
until the Main Boom is fully raised. Then,
press Forward on the Boom Extension Control
Lever until the Boom is fully extended.
5. Press forward on the Bucket Control Lever
until the Bucket is fully extended. Pull
back on the Lever to retract it fully.
6. Pull back on the Boom Extension Control Lever
until the Boom is pulled back all the way. Pull
back on the Main Boom Control Lever until
the Main Boom is lowered completely.
7. Repeat steps 2– 5 three to four times.
8. Adjust the Boom back to its rest position
and replace all locking devices.
9. Shut off the Engine, check the Hydraulic
Fluid level and refill as necessary.
note: The Fill Plug is vented. When tightening the
Fill Plug, tighten it securely, then back it off slightly.
Fuel Filter replacement (if equipped)
WarninG! TO preVenT SeriOuS
inJury FrOM Fire Or eXpLOSiOn:
Fill the fuel tank in a well-ventilated area
away from ignition sources. If the engine is
hot from use, shut the engine off and wait
for it to cool. Do not smoke.
1. Wear protective gear including, ANSI-
approved safety goggles, NIOSH-approved
dust mask/respirator, and nitrile gloves.
2. Clean the Fuel Cap and the area around it.
3. Remove Fuel Filter (6R). Reattach Fuel Cap to
prevent debris from entering into Gas Tank.
4. Remove Fuel Strainer. Wash with warm water
and light detergent. Flush and let dry.
5. Reinstall in the Gas Tank.
engine Oil Change
CauTiOn! Oil is very hot during operation and can
cause burns. Wait for engine to cool before changing oil.
1. Make sure the engine is stopped and is level.
2. Close the Fuel Valve.
3. Place a drain pan (not included) underneath
the crankcase’s drain plug.
4. Remove the drain plug and, if possible,
tilt the crankcase slightly to help drain
the oil out. Recycle used oil.
5. Replace the drain plug and tighten it.
6. Clean the top of the Dipstick and the area around it.
Remove the Dipstick by turning it counterclockwise,
and wipe it off with a clean, lint free rag.
7.
Full level
Full level
Add the appropriate type of oil until the oil level is at
the full level. SAE 10W-30 oil is recommended for
general use.
The SAE Viscosity Grade chart shows other
viscosities to use in different average temperatures.
10W-30
30
5W-30
-20 0 20 40 60 80 100°F
Sae Viscosity Grades
average outdoor temperature
8. Thread the dipstick back in clockwise.
nOTiCe: Do not run the engine with too little oil.
engine will not start with low or no engine oil.
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air Filter element Maintenance
1. Remove the air filter cover and the air filter elements
and check for dirt. Clean as described below.
2. Cleaning:
• For “paper” filter elements:
To prevent injury from dust and debris,
wear ANSI-approved safety goggles,
NIOSH-approved dust mask/respirator, and
heavy-duty work gloves. In a well-ventilated
area away from bystanders, use pressurized
air to blow dust out of the air filter.
If this does not get the filter clean, replace it.
• For foam filter elements:
Wash the element in warm water and
mild detergent several times. Rinse.
Squeeze out excess water and allow it to dry
completely. Soak the filter in lightweight oil
briefly, then squeeze out the excess oil.
3. Install the cleaned filter. Secure the
Air Cleaner Cover before use.
Spark plug Maintenance
1.
Spark
plug
Cap
Disconnect Spark Plug Cap from end of Plug.
Clean out debris from around Spark Plug.
2. Using a spark plug wrench, remove the Spark Plug.
3. Inspect the Spark Plug:
If the electrode is oily, clean it using a clean, dry rag.
If the electrode has deposits on it, polish it using
emery paper. If the white insulator is cracked or
chipped, the Spark Plug needs to be replaced.
recommended Spark plugs
F6TC (Torch / LG)
nOTiCe: Using an incorrect spark plug
may damage the engine.
4. When installing a new spark plug,
adjust the plug’s gap to the specification on the
Specifications chart. Do not pry against the
electrode; the spark plug can be damaged.
5. Install the new spark plug or
the cleaned spark plug into the engine.
• Gasket-style:
Finger-tighten until the Gasket
contacts the Cylinder Head,
then tighten about 1/2-2/3 turn more.
• non-gasket-style:
Finger-tighten until the plug
contacts the Cylinder Head,
then tighten about 1/16 turn more.
nOTiCe: Tighten the Spark Plug properly.
if loose, the Spark Plug will cause the
engine to overheat.
if overtightened, the threads in the
engine block will be damaged.
6. Apply dielectric spark plug boot protector
(not included) to the end of the Spark Plug
and reattach the wire securely.
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Long-Term Storage
When the equipment is to remain idle for longer than
20 days, prepare the engine for storage as follows:
1. CLeaninG:
Wait for engine to cool, then clean engine with
dry cloth. nOTiCe: Do not clean using water.
The water will gradually enter the engine and
cause corrosion damage. Apply a thin coat of
corrosion preventive oil to all metal parts.
2. FueL:
To protect the Fuel Tank during storage, fill the
tank with fresh gasoline that has been treated with
a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use. Refer
to Checking and Filling Fuel on page 18.
WarninG! TO preVenT SeriOuS
inJury FrOM Fire:
Fill tank in a well-ventilated area away from
ignition sources. If the engine is hot from
use, shut the engine off and wait for it to
cool before adding fuel. Do not smoke.
3. LuBriCaTiOn:
a. Change engine oil.
b. Clean out area around spark plug.
Remove spark plug and pour one tablespoon of
engine oil into cylinder through spark plug hole.
c. Replace spark plug, but leave
spark plug cap disconnected.
d. Pull Starter Handle to distribute oil in cylinder.
Stop after one or two revolutions when you
feel the piston start the compression stroke
(when you start to feel resistance).
4. BaTTery:
Disconnect battery cables (if equipped).
Recharge batteries monthly while in storage.
5. STOraGe area:
Cover and store in a dry, level, well-ventilated
area out of reach of children. Storage area
should also be away from ignition sources, such
as water heaters, clothes dryers, and furnaces.
nOTiCe: During extended storage periods the
Engine must be started every 3 months and allowed
to run for 15 – 20 minutes or the Warranty is VOID.
6. STARTING ENGINE DURING / AFTER STORAGE:
Before starting the Engine during or after
storage, keep in mind that untreated gasoline
will deteriorate quickly. Drain the fuel tank and
change to fresh fuel if untreated gasoline has
been sitting for a month, if treated gasoline
has been sitting beyond the fuel stabilizer’s
recommended time period, or if the Engine
does not start. For Engine starting instructions
refer to Starting the Engine on page 18.
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Troubleshooting
problem possible Causes probable Solutions
Engine will not start
FUEL RELATED:
1. No fuel in tank or fuel valve closed.
2. Choke not in START position, cold engine.
3. Gasoline with more than 10% ethanol used.
(E15, E20, E85, etc.)
4. Low quality or deteriorated, old gasoline.
5. Carburetor not primed.
6. Dirty fuel passageways.
7. Carburetor needle stuck.
Fuel can be smelled in the air.
8. Too much fuel in chamber. This can be caused
by the carburetor needle sticking.
9. Clogged Fuel Filter.
FUEL RELATED:
1. Fill fuel tank with fresh 87+ octane stabilizer-
treated unleaded gasoline and open fuel
valve.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
2. Move Choke to START position.
3. Clean out ethanol rich gasoline from fuel
system. Replace components damaged by
ethanol. Use fresh 87+ octane stabilizer-
treated unleaded gasoline only.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
4. Use fresh 87+ octane stabilizer-treated
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
5. Pull on Starter Handle to prime.
6. Clean out passageways using fuel additive.
Heavy deposits may require further cleaning.
7. Gently tap side of carburetor float
chamber with screwdriver handle.
8. Turn Choke to RUN position. Remove
spark plug and pull the start handle several
times to air out the chamber. Reinstall
spark plug and set Choke to START position.
9. Replace Fuel Filter.
IGNITION (SPARK) RELATED:
1. Spark plug cap not connected securely.
2. Spark plug electrode wet or dirty.
3. Incorrect spark plug gap.
4. Spark plug cap broken.
5. Incorrect spark timing or faulty ignition system.
IGNITION (SPARK) RELATED:
1. Connect spark plug cap properly.
2. Clean spark plug.
3. Correct spark plug gap.
4. Replace spark plug cap.
5. Have qualified technician diagnose/
repair ignition system.
COMPRESSION RELATED:
1. Cylinder not lubricated.
Problem after long storage periods.
2. Loose or broken spark plug.
(Hissing noise will occur
when trying to start.)
3. Loose cylinder head or damaged head gasket.
(Hissing noise will occur when trying to start.)
4. Engine valves or tappets mis-adjusted or stuck.
ENGINE OIL RELATED:
1. Low engine oil.
2. Engine mounted on slope,
triggering low oil shutdown.
COMPRESSION RELATED:
1. Pour tablespoon of oil into spark plug
hole. Crank engine a few times
and try to start again.
2. Tighten spark plug.
If that does not work, replace spark plug.
If problem persists, may have head
gasket problem, see #3.
3. Tighten head.
If that does not remedy problem,
replace head gasket.
4. Have qualified technician adjust/
repair valves and tappets.
ENGINE OIL RELATED:
1. Fill engine oil to proper level.
Check engine oil before EVERY use.
2. Operate engine on level surface.
Check engine oil level.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
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problem possible Causes probable Solutions
Engine misfires
1. Spark plug cap loose.
2. Incorrect spark plug gap or
damaged spark plug.
3. Defective spark plug cap.
4. Old or low quality gasoline.
5. Incorrect compression.
1. Check cap and wire connections.
2. Re-gap or replace spark plug.
3. Replace spark plug cap.
4. Use only fresh 87+ octane stabilizer-treated
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
5. Diagnose and repair compression.
(Use engine will not start:
COMpreSSiOn reLaTeD section.)
Engine stops
suddenly
1. Fuel tank empty or full of impure or low quality
gasoline.
2. Low oil shutdown.
3. Defective fuel tank cap creating vacuum,
preventing proper fuel flow.
4. Faulty magneto.
5. Disconnected or improperly
connected spark plug cap.
1. Fill fuel tank with fresh 87+ octane stabilizer-
treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
2. Fill engine oil to proper level.
Check engine oil before EVERY use.
3. Test/replace fuel tank cap.
4. Have qualified technician service magneto.
5. Secure spark plug cap.
Engine stops when
under heavy load
1. Dirty air filter
2. Engine running cold.
1. Clean element.
2. Allow engine to warm up prior
to operating equipment.
Engine knocks
1. Old or low quality gasoline.
2. Engine overloaded.
3. Incorrect spark timing, deposit buildup,
worn engine, or other mechanical problems.
1. Fill fuel tank with fresh 87+ octane stabilizer-
treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
2. Do not exceed equipment’s load rating.
3. Have qualified technician diagnose
and service engine.
Engine backfires
1. Impure or low quality gasoline.
2. Engine too cold.
3. Intake valve stuck or overheated engine.
4. Incorrect timing.
1. Fill fuel tank with fresh 87+ octane stabilizer-
treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (e15, e20, e85, etc.).
2. Use cold weather fuel and oil additives
to prevent backfiring.
3. Have qualified technician diagnose
and service engine.
4. Check engine timing.
After sudden
impact, engine will
run, but equipment
will not operate
Shaft key or other shear pin broken by impact
to disconnect engine and limit damage.
Have qualified technician check and replace
broken shaft key or other shear pins.
Backhoe loses
performance
1. Mushy hydraulic operation.
2. Oil Leaks.
1. Bleed hydraulic system. Refer to Purging
the Hydraulic System on page 27.
Replace hydraulic filter / clean strainer.
2. Tighten / replace hose.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
Page 32 For technical questions, please call 1-888-866-5797. Item 59703
SaFeTy SeTup OperaTiOn MainTenanCe
part Description Qty.
1 Nut 5/16" 3
2 Spring Washer 3/8" 6
3 Control Panel 1
4 Washer 3/8" 5
5 Hex Bolt 3/8" x 1-1/8" 4
6 Plate 1
7 Hose Assembly No.6 1
8 Hex Connector 10
9 Control Valve Assembly 1
10 Seat BottomPlate 1
11 Fill Plug / Dipstick 1
12 Spring Washer 5/16" 21
13 Hose Assembly No.1 1
14 Hex Bolt 3/8" x 1" 2
15 Safety Locking Pin 2
16 R-Clip 8
17 Hose Assembly No.4 1
18 Hose Assembly No.9 1
19 Right Extension Leg 1
20 Lock Pin No.1 4
21 Hose Assembly No.5 1
22 Hose Assembly No.10 1
23 Hex Bolt 5/16" x 2-3/4" 3
24 Leg Assembly 2
25 90 Degree Elbow Fitting No.1 8
26 Hydraulic Cylinder 4
27 Connecting Rod (Short) 2
28 Connecting Rod (Long) 2
29 Clevis Pin No.1 8
30 Bushing 1
31 Cotter Pin 3/16" x 2-5/16" 16
32 Bucket Assembly 1
33 Lubrication Fitting 14
34 Boom Extension 1
35 Clevis Pin No.2 2
36 Main Boom 1
37 Lubrication Fitting 4
38 Boom Pivot 1
39 Hose Assembly No.3 1
40 Hose Assembly No.8 1
41 Safety Latch 1
42 Pin 2
43 Spring 1
44 Washer 15/16" 1
45 Left Extension Leg 1
46 Hose Assembly No.2 2
47 Nut 5/16" 5
48 Hex Bolt 5/16" x 3/4″ 4
49 Cover 1
50 Axle & Hub Assembly 2
51 Hair Pin Clip 1/8" x 1-3/4" 2
part Description Qty.
52 Wheel / Tire Assembly 2
53 Spindle Nut 2
54 Outlet Hose 1
55 Hose Clamp 2
56 Safety Chain 1
57 Nut 3/8" 3
58 Hitch Coupler 1
59 Nut 1/2" 1
60 Hex Bolt 3/8" x 2-3/4" 2
61 Hex Bolt 3/8" x 3-1/2" 1
62 Hex Bolt 5/16" x 1" 2
63 Washer 5/16" 13
64 90 Degree Elbow Fitting No.4 1
65 Hydraulic Pump 1
66 90 Degree Elbow Fitting No.3 1
67 Pump Key 1
68 Coupling-Pump Side 1
69 Hex Screw 2
70 Mounting Bracket - Pump 1
71 Engine Key 1
72 Hex Bolt 5/16" x 1-3/4" 4
73 Seat 1
74 Engine 1
75 Hex Bolt 5/16" 4
76 Coupling-Engine Side 1
77 Hair Pin Clip 1
78 Wheel 1
79 Lock Pin 1
80 Weight Block 1
81 Hex Bolt 5/8" x 4-3/4" 1
82 Lock Pin No.2 2
83 Washer 5/8 1
84 Nut 5/8" 1
85 90 Degree Elbow Fitting No.2 1
86 Hex Bolt 5/16" x 1-1/8" 4
87 O-Ring Seal 1
88 Hydraulic Fluid Filter 1
89 Hydraulic Fluid Plug R3/8" 1
90 Frame Assembly 1
91 Clevis Pin No.3 3
92 Washer 2
93 Pivot Pin 1
94 Hose Retaining Ring 1
95 Snap Spring 1
96 Spring Washer 1/4" 2
97 Hex Bolt 1/4" x 1/2" 2
98 R-Clip 4
99 Thumb 1
100 Pads 4
101 Thumb Support Bar 1
102 Clevis Pin 1
record product’s Serial number Here:
note: If product has no serial number, record month and year of purchase instead.
note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts. Specify UPC 193175479044 when ordering parts.
parts Lists and Diagrams
Main parts List
Page 33For technical questions, please call 1-888-866-5797.Item 59703
SaFeTySeTupOperaTiOnMainTenanCe
Main assembly Diagram
101
102
91
91
98
98
Page 34 For technical questions, please call 1-888-866-5797. Item 59703
SaFeTy SeTup OperaTiOn MainTenanCe
engine parts List
part Description Qty.
1A Cylinder Head Cover Bolt 1
2A Cylinder Head Cover Gasket Set 1
3A Cylinder Head Cover Subassembly 1
4A Breather Tube 1
5A Cylinder Head Cover Gasket 1
6A Valve Lock Nut 2
7A Valve Lock Clamp 4
8A Seat, Valve Spring 2
9A Fuel Tank Frame 1
10A Valve Adjusting Nut 2
11A Valve Spring 2
12A Valve Rocker 2
13A Seal Guide 2
14A Valve Spring Retainer 1
15A Rockshaft Bolt 2
16A Lifter Stop Plate Subassembly 1
17A Cylinder Head Bolt 4
18A Cylinder Head Subassembly 1
19A Spark Plug 1
20A Cylinder Head Gasket 1
21A Position Pin 2
22A Valve Set 1
23A Piston Ring Set 1
24A Piston Pin Clip 2
25A Piston 1
26A Piston Pin 1
27A Connecting Rod 1
28A Valve Lifter Subassembly 2
29A Valve Tappet 2
30A Stud Bolt 2
31A Inlet Gasket 1
32A Carburetor Insulator Plate 1
33A Carburetor Seal Gasket 1
34A Carburetor Assembly 1
35A Air Cleaner Seal Gasket 1
36A Air Cleaner 1
37A Hex Flange Nut 3
38A Bolt 2
39A Bolt 2
40A Stud Bolt 2
41A Exhaust Outlet Gasket 1
42A Exhaust Pipe 1
43A Hex Flange Nut 3
44A Hex Flange Nut 4
45A Muffler Gasket 1
46A Muffler Assembly 1
47A Crankcase Subassembly. 1
48A Flat Washer 2
part Description Qty.
49A Drain Plug Bolt 2
50A Cylinder Body Shroud 1
51A Bolt 9
52A Rubber Plug 1
53A Oil Seal 2
54A Oil Protector 1
55A Wire Clip 1
56A Wire Clip 2
57A Governor Arm 1
58A Flat Washer 1
59A Fuel Cap 1
60A Cotter Pin 1
61A Throttle Valve Return Spring 1
62A Governor Rod 1
63A Governor Bracket Subassembly 1
64A Governor Support Bolt 1
65A Fuel Strainer 1
66A Governor Spring 1
67A Throttle Control Assembly 1
68A Deep Groove Ball Bearing 1
69A Engine Oil Sensor 1
70A Bolt 2
71A Hex Flange Nut 1
72A Crankshaft Assembly 1
73A Camshaft Assembly 1
74A Fuel Tank Oil Outlet Subassembly 1
75A Position Pin 2
76A Crankcase Gasket 1
77A Oil Dipstick Subassembly 1
78A Governor Gear Assembly 1
79A Crankcase Cover 1
80A Engine Oil Plug Subassembly 1
81A Bolt 7
82A Ignition Coil 1
83A Bolt 2
84A Flywheel Subassembly 1
85A Impeller 1
86A Starter Pulley 1
87A Flywheel Nut 1
88A Shroud 1
89A Pipe Clamp 1
90A Fuel Tube 1
91A Pipe Clamp 1
92A Engine Switch Subassembly 1
93A Recoil Starter Assembly 1
94A Bolt 3
95A Fuel Tank 1
When ordering replacement parts from this list, the “A”suffix must be included in order to get the correct part.
Page 35For technical questions, please call 1-888-866-5797.Item 59703
SaFeTySeTupOperaTiOnMainTenanCe
engine assembly Diagram
37
9
38
38
39
89
90
91
55
56
59
65
74
Page 36 For technical questions, please call 1-888-866-5797. Item 59703
SaFeTy SeTup OperaTiOn MainTenanCe
pLeaSe reaD THe FOLLOWinG CareFuLLy
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS
QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE
ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND
LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS
THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Page 37For technical questions, please call 1-888-866-5797.Item 59703
SaFeTySeTupOperaTiOnMainTenanCe
Warranties
Limited 90 Day Warranty (retail)
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so
the above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY
AND FITNESS, EXCEPT FOR THE EMISSIONS CONTROL SYSTEM WARRANTY BELOW.
To take advantage of this warranty, the product or part must be returned to us with transportation charges prepaid.
Proof of purchase date and an explanation of the complaint must accompany the merchandise. If our
inspection verifies the defect, we will either repair or replace the product at our election or we may elect to
refund the purchase price if we cannot readily and quickly provide you with a replacement. We will return
repaired products at our expense, but if we determine there is no defect, or that the defect resulted from
causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
Page 38 For technical questions, please call 1-888-866-5797. Item 59703
SaFeTy SeTup OperaTiOn MainTenanCe
emissions Control System Warranty
In accordance with U.S. Environmental Protection Agency (EPA) regulations, Harbor Freight Tools (HFT) is pleased
to explain the emissions control system warranty on your Model Year 2024 engine/equipment in addition to the Retail
Warranty above. HFT warrants that the emissions control system on your engine is designed, built, and equipped so
that it conforms to the United States Environmental Protections Agency’s (EPA) emissions requirements in effect at
the time of manufacture. HFT also warrants that the emissions control system on your engine will be free from defects
in material and workmanship for two (2) years, provided there has been no improper maintenance, misuse, or abuse
of your engine.
Your emissions control system may include parts such as the carburetor or fuel-injection system, and the ignition
system. Also included may be hoses, belts, connectors and other emissions-related assemblies.
CaLiFOrnia OnLy: This engine’s emission standards are governed solely by
U.S. Environmental Protection Agency regulations because it is intended for use
primarily in a farm or construction equipment or activity in California.
WHaT We WiLL DO
Where a warrantable condition exists, HFT will repair or replace, at our option, any emissions-related part on
your engine if it becomes defective, malfunctions, or otherwise fails to conform with this warranty under normal use
and service during the two (2) year term of this warranty at no cost to you, including diagnosis, parts and labor. This
warranty applies to the original purchaser and any subsequent owner within the two year warranty period.
WHaT iS COVereD?
The following parts are examples of components of the emissions control system and are covered by this
two (2) year warranty. For a full list of emissions control components covered by this warranty, please see 40 CFR
§1068, Appendix I.
1. Fuel Metering System
a. Carburetor and its internal parts.
b. Fuel pump (if so equipped).
c. Cold start enrichment system.
2. Air Induction System
a. Intake pipe/manifold.
b. Air cleaner.
3. Ignition System
a. Spark plug.
b. Magneto ignition system.
4. Catalyst System (if so equipped)
a. Exhaust pipe stud.
b. Muffler.
c. Catalytic converter (if so equipped).
5. Miscellaneous Items Used in Above Systems
a. Vacuum, temperature and time sensitive valves
and switches.
b. Hoses, belts, connectors, and assemblies.
This warranty does not cover normal maintenance services or replacement of maintenance items such as filters,
oils, or spark plugs.
Page 39For technical questions, please call 1-888-866-5797.Item 59703
SaFeTySeTupOperaTiOnMainTenanCe
WHaT yOu MuST DO TO OBTain WarranTy SerViCe
As the engine owner, you are responsible for the performance of the required maintenance listed in your
Owner’s Manual. HFT may deny you warranty coverage if your engine or a part has failed due to abuse (including
failure to follow the fuel use instructions contained in this manual), neglect, improper maintenance, or unapproved
modifications.
In order to obtain warranty repair or replacement, you may either (a) contact HFT product support at 1-888-866-5797
or [email protected]; or (b) bring the engine/equipment to your nearest Harbor Freight Tools retail
store. When going to the retail store or contacting product support, you must indicate the specific emissions control
part or defect that you are claiming and the date this was originally purchased. The nearest Harbor Freight Tools retail
store can be found on the internet at https://www.harborfreight.com.
26677 agoura road • Calabasas, Ca 91302 • 1-888-866-5797
