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TM 10-3930-638-24&P
3-30. HYDRAULIC LIFT SYSTEM MAINTENANCE (cont)
d. Rotation Cylinder Assembly.
This task covers:
a. Removal
e.
b. Disassembly
f.
c. Cleaning
g.
d. Inspection/Repair
INITIAL SETUP
Reassembly
Testing
Installation/Replacement
TOOLS
EQUIPMENT CONDITION
No. 1 Common Organiza-
NSN 4910-00-754-0654
Paragraph
Condition Description
tional Maintenance Tool Kit
Vehicle parked on level surface, engine
Chain Hoist, 1/2 ton capacity
off, parking brake applied, mast vertical,
Sleeve, 1-5/8 inches diameter
and forks resting on ground.
Hydraulic Pump (used for testing)
Control valve control levers operated
several times to relieve hydraulic pressure
MATERLALS/PARTS
Cleaning solvent P-D-680
Clean cloths
Seal repair kit
Clean hydraulic oil (refer to current lubrication order)
Medium grit emery cloth
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
WARNING
Dry cleaning solvent (P-D-680), used to clean parts is toxic and
flammable. Wear protective goggles and gloves and use only in a
well ventilated area. Avoid contact with skin, eyes, and clothes
and don’t breathe vapors. Do not use near open flame or exces-
sive heat and don’t smoke when using it. Failure to do so could
cause serious injury. If you become dizzy while using cleaning
solvent, get fresh air immediately, and get medical attention. If
contact with skin or clothes is made, flush with large amounts of
water. If contact with eyes is made, wash eyes with water immedi-
ately, and obtain medical aid immediately.
1
Mast assembly,
a. Hose fitting
Clean, loosen,
Use cleaning solvent P-D-680
rear
(1 and 2)
disconnect and
cap
b. 90 degree elbow
Remove
(3)
c. 45 degree fitting (4)
Remove
d. Two 90 degree
Remove
Plug rotation cylinder assembly ports
fittings (5)
e. Two retaining rings
Remove
(6) and spacers (7)
f. Rotation cylinder
Remove to clean
assembly (8)
work area
3-232
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