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TM 10-3930-638-24&P
3-31. MAST ASSEMBLY MAINTENANCE (cont)
b. Side Shifter Frame and Rotation Bearing (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL (cont)
3
Mast assembly
a. Mast assembly
Remove
Use chain hoist and move to work area.
Position mast on two steel horses with
side shifter frame facing up
b. Rotation cylinder
Remove
Para 3-30d
assembly
c. Sideshift cylinder
Remove
Para 3-30c
assembly
4
Side shifter
Two sideshift chains
Remove
Para 2-56e
frame (11),
and pulleys
front
5
Side shifter
a. 20 cap screws (8),
Remove
frame (11),
nuts (9) and
center
washers (10)
b. Chain hoist
Secure
To side shifter frame
WARNING
Be sure chain hoist is securely attached to side shifter frame (11)
before performing following step. Failure to do so could cause
frame (11) to fall causing serious bodily injury.
c. Side shifter frame (11)
Remove
6
Carriage bear-
a. 16 cap screws (12)
Remove
ing plate (14)
NOTE
If cap screws (12) are difficult to remove in above step, heat cap
screws then remove and discard.
b. Rotation bearing (13)
Remove
c. Four-hose assemblies
Remove
Para 2-56f(2)
d. Four tube assemblies
Remove
Para 2-56f(2)
e. Two lift chains
Disconnect ends
Para 2-56d
connected to car-
riage bearing plate
f. Carriage bearing
Move half-way out
plate (14)
of inner mast
g. Sling hoist
Secure to carriage
bearing plate (14)
3-253
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