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TM 10-3930-638-24&P
3-31. MAST ASSEMBLY MAINTENANCE (cont)
a. Carriage Assembly (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
CLEANING (cont)
4
All parts
Clean
Use cleaning solvent P-D-680; dry thorough
ly
INSPECTION/REPAIR
5
Carriage travel bar (4)
Inspect
Replace if excessively worn in one area,
bent, or deformed
6
Fork travel bar (7)
Inspect
Replace if excessively worn in one area,
bent, deformed, or cracked
7
Carriage assem-
a. Overall
Inspect
Replace or repair by welding if cracked,
bly
broken, or structurally damaged
b. Bushings (10)
Inspect
Replace if worn; use bore gage and mea-
sure inside diameter. Replace if measure-
ment is more than 3 inches
8
All other parts
Inspect
Replace if damaged, cracked, or worn
REASSEMBLY
9
Carriage assem-
a. Two bushings (10)
Install
Until seated
bly, sides
b. Two snap rings (9)
Install
In ring groove
c. Fork travel bar (7)
Position and
In bore. Use 1-1/2 inches diameter bar and
install
drive into carriage
d. Lubrication fitting (8)
Install
10
Carriage assem-
Cap screw (5) and nut (6)
Install
If holes are not aligned, tap bar (7) until
bly, center
holes line up
INSTALLATION/REPLACEMENT
11
Side shifter
a. Carriage assembly (11) Position
Use chain hoist to move into position and
frame
align with side shifter frame
b. Carriage travel bar (4)
Position and
In bore. Use 2 inches diameter bar and
install
drive into side shifter frame and then into
carriage assembly (11) bore. Be sure
bores align
c. Two retainers (3)
Position
d. Four cap screws (1) and Install
lock washers (2)
NOTE
Remove wood blocks and lower forks to ground.
3-250
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