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TM 10-3930-638-24&P
3-31. MAST ASSEMBLY MAINTENANCE (cont)
c. Inner and Outer Mast.
This task covers:
a. Removal
c. Inspection/Repair
b. Cleaning
d. Installation/Replacement
PERSONNEL REQUIRED
Two maintenance technicians
INITIAL SETUP
TOOLS
Chain Hoist, 1/2 ton capacity
Automotive Mechanic’s Tool Kit
NSN 5180-00-754-0641
MATERIALS/PARTS
EQUIPMENT CONDITION
Cleaning solvent P-D-680
Paragraph
Condition Description
Clean cloths
3-3 lb
Side shifter frame and rotation bearing
removed.
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
1
Mast
a. Lift cylinder assem-
Remove
Para 3-30e
bly
b. Hose and tube as-
Remove
Para 2-56f(2)
semblies
c. Two lift chains and
Remove
Para 2-56d
pulleys
d. Two stop bolts (1)
Remove
and lock washers
(2)
2
Inner mast (3)
a. Inner mast (3)
Slide out of outer mast until bottom roller bearings (4) are in
line with cut-outs in side of outer mast (12)
b. Chain hoist
Attach and
To inner mast at approximate center
take up slack
WARNING
Be sure chain hoist is securely fastened to inner mast before perform-
ing following step. Failure to do so could cause serious bodily injury
by mast falling on you.
c. Inner mast (3)
Remove
Push down at top of inner mast to disen-
gage roller bearings (4) from outer mast
(12) while lifting inner mast using chain
hoist
3-259
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