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 TM 10-3930-638-24&P
3-31. MAST ASSEMBLY MAINTENANCE (cont)
b. Side Shifter Frame and Rotation Bearing (cont).
LOCATION
ITEM
REMARKS
ACTION
STEP
CLEANING (cont)
7
NOTE
(cont)
Don't immerse roller bearings (15 and 18) or rotation bearing
(13) in cleaning solvent.
INSPECTION/REPAIR
8
Lower pivot mast pin
Inspect
Replace if bent or distorted, threads dam-
(5)
aged, or worn
9
Roller bearings (15 and
Inspect
Replace if out of round, scored, burred,
18) and cam roller (20)
sharp edged, or worn
10
Inspect
Side shifter frame (11)
Replace or repair by welding if cracked,
and carriage bearing
broken, or structurally damaged. Replace
plate (14)
if bent or warped
11
Inspect
Rotation bearing (13)
Replace if out of round, scored, burred,
worn, or distorted. Repair damaged
threads by chasing with 5/8-11 UNC
2B tap
12
All other parts
Inspect
Replace if damaged, worn, cracked, or
distorted
INSTALLATION/REPLACEMENT
13
Carriage bear-
a. Two cam rollers (20)
Install
ing plate (14)
Install
b.
Shims (19)
c.
Four roller bearings (18) Install
d.
Install
Two cap screws (17)
On two bottom roller bearings
e.
Install
Shims (16)
f.
Two roller bearings (15) Install
Secure to
Sling hoist
g.
carriage bear-
ing plate (14)
3-255
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