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 CAUTION
Be careful not to damage cylinder
assembly when removing it from
mast assembly.
c. Disassembly.
Refer to figure 4-5 and
disassemble as follows:
(1) Using a spanner wrench, remove gland
nut (2) and wiper (11).
(2) Close off bleeder port, insert airhose in
1/2inch port and use compressed air to force packing (3)
and packing set (10) from tube assembly (5).
(3) Remove tube assembly (13) (plunger) with
bearing (4), spacer (12), and stop ring (11).
(4) Remove snapring (9) and restrictor parts
(6, 7, and 8).
d. Cleaning and Inspection.
(1) Clean all metal parts in SD.
(2) Examine wearing surfaces of tube
assemblies (5 and 13) for damage and evidence of
misalignment.
(3) Examine packings and wiper (1) for
scores, folded edges, and worn or torn sections.
Existence of these conditions indicates excessive
pressure or a loose gland nut (2)
(4) Inspect spring (7) for bent or stretched
condition.
(5) Replace parts as necessary.
e. Assembly. Reverse procedures in c above.
f. Installation.
(1) Reverse procedures in b above.
CAUTION
Be certain that all parts are clean and
that there is no foreign matter in the
cylinder tube.
(2) When cylinder has been installed, run lift
to extreme upper limit then open bleeder screw one or
two turns. Allow trapped air and foamy oil to run out.
When a clear stream of oil appears, tighten bleeder
screw.
1 Wiper
2 Gland nut
3 Packing
4 Bearing
5 Tube assembly
6 Washer
7 Spring
8 Spacer
9 Snapring
10 Packing set
Figure 4-5. Hydraulic lift cylinder.
11 Stop ring
12 Spacer
13 Tube assembly
4-9
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