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 TM 9-2320-285-24-2
3-42. FIFTH WHEEL HYDRAULIC SYSTEM MAINTENANCE (CONT)
d. Hydraulic Cylinders (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY
11
Gland (11)
NOTE
Lubricate the following parts with clean hydraulic oil prior to installation.
a.
New rod seal
Install
Grooved side toward piston
(18)
end
b.
New wiper (17)
Install
Chamfered side toward rod end
c.
New back-up
Install
Butt against rod end of
ring (20)
groove in gland (11)
d.
New O-ring (19)
Install
CAUTION
Use extreme care when performing following step not to damage wiper (17), rod seal (18), or O-ring (19).
12
Rod (12)
a.
Gland (11) with
Install
As an assembly
wiper (17),
rod seal (18)
and rings (19
and 20)
b.
New O-ring (16)
Lubricate and
Use clean hydraulic oil
install
c.
Piston (14)
Lubricate and
Coat entire piston with clean
install
hydraulic oil. Slide piston
over O-ring (16) and butt
against rod (12)
d.
New insert (29)
Lubricate and
Use clean hydraulic oil
and solid
install
seal (15)
e.
New locknut
Install
Coat threads of rod (12) and
(13)
locknut (13) with degreas-
ing solvent and allow to
air dry ten minutes. Light-
ly coat threads of rod and
locknut with stud lock com-
pound; then tighten locknut
to 375 pounds foot. Allow
to air dry before testing
cylinder
3-448
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