Inner and Outer Mast

TM 10-3930-638-24&P

3-31. MAST ASSEMBLY MAINTENANCE (cont)

c. Inner and Outer Mast.

This task covers:

a. Removal

c. Inspection/Repair

b. Cleaning

d. Installation/Replacement

PERSONNEL REQUIRED

Two maintenance technicians

INITIAL SETUP

TOOLS

Chain Hoist, 1/2 ton capacity

NSN 5180-00-754-0641

Automotive Mechanic's Tool Kit

EQUIPMENT CONDITION

MATERIALS/PARTS

Condition Description

Paragraph

Cleaning solvent P-D-680

Side shifter frame and rotation bearing

3-3 lb

Clean cloths

removed.

ACTION

STEP

ITEM

REMARKS

LOCATION

REMOVAL

Para 3-30e

Remove

a. Lift cylinder assem-

Mast

bly

Para 2-56f(2)

Remove

b. Hose and tube as-

semblies

Para 2-56d

Remove

c. Two lift chains and

pulleys

Remove

d. Two stop bolts (1)

and lock washers

(2)

Slide out of outer mast until bottom roller bearings (4) are in

a. Inner mast (3)

Inner mast (3)

line with cut-outs in side of outer mast (12)

To inner mast at approximate center

Attach and

b. Chain hoist

take up slack

WARNING

Be sure chain hoist is securely fastened to inner mast before perform-

ing following step. Failure to do so could cause serious bodily injury

by mast falling on you.

Push down at top of inner mast to disen-

Remove

c. Inner mast (3)

gage roller bearings (4) from outer mast

(12) while lifting inner mast using chain

hoist

3-259