Side Shifter Frame and Rotation Bearing

TM 10-3930-638-24&P

3-31 MAST ASSEMBLY MAINTENANCE (cont)

b. Side Shifter Frame and Rotation Bearing.

This task covers:

a. Removal

c. Inspection/Repair

b. Cleaning

d. Installation/Replacement

PERSONNEL REQUIRED

Two maintenance technicians

INITIAL SETUP

EQUIPMENT CONDITION

TOOLS

Chain Hoist, 1/2 ton capacity

Paragraph

Condition Description

Fork assembly grounded; mast

Automotive Mechanic's Tool Kit

NSN 5180-00-754-0641

assembly in vertical position.

Tap, 5/8-11 UNC 2B

2-56f(1)

Hoses, lines, and fittings

Steel Horses (2)

between control valve and

mast assembly, disconnected

MATERIALS/PARTS

at mast assembly and lift

Cleaning solvent P-D-680

cylinder assembly.

Clean cloths

2-47

Front axle tires and wheels removed

3-31a

Carriage assembly removed.

REMARKS

ITEM

ACTION

STEP

LOCATION

REMOVAL

To top of inner mast; take up all slack

Attach

Chain hoist

Inner mast

WARNING

Before performing following steps, be sure mast assembly is se-

curely supported by chain hoist. Failure to do so will cause mast

assembly to pivot forward on pivot mast pin which could result

in bodily injury.

a. Four retaining rings (1) Remove

Mast assembly,

Remove

b. Two pins (2)

sides

Reposition out of

c. Tilt cylinder as-

way

semblies

Loosen

d. Two nuts (3)

Use ten pound hammer

Tap to loosen

e. Two lower pivot

mast pins (5)

Remove

f. Two nuts (3)

Remove

g. Two washers (4)

Remove

h. Two lower pivot mast

pins (5)

Remove

i. Two washers (6)

Remove

j. Two lubrication

fittings (7)

Change 1

3-251