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