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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
pin
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)
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