Section VI. CARRIAGE AND BACKREST ASSEMBLIES

TM 10-3930-621-34

a. Using a hoist, remove single cylinder assembly

10-26. Assembly

from supports and install cylinder through intermediate

a. Refer to figure 10-7 and assemble as follows:

mast (7) and secure to outer mast (1) with lock washer

b. Loosely install bleeder screw (2) in tube (3).

(48) and nut (49).

c. Install wear block (4) on ram (1) and carefully

b. Secure cylinder assembly to bracket at top of

slide ram into tube (3).

intermediate mast (7) with lock washer (42) and screw

d. Install stop ring (12) and new packing (11) and

(43).

backup ring (10) on ram.

c. Secure bottom of cylinder assembly to

e. Install spacer (6) and new packing (8) and wiper

intermediate mast (7) with spacer (29), clamp (28),

ring (7) in gland nut (9).

screw (57), and lock washer (58).

f. Using new locking pellets (5), secure gland nut

D Install cylinder cluster as described in paragraph

(9) to tube (3) with spanner wrench.

10-21, being sure to tighten bleeder screw (2, fig. 10-7)

10-27. Installation

when clear, bubble free oil flow is obtained.

To install the single cylinder assembly without removing

the mast, refer to figure 10-3 and proceed as follows:

Section VI. CARRIAGE AND BACKREST ASSEMBLIES

frame assembly (7). Remove backrest.

10-28. Description

d. Raise inner mast 24 inches from mast to floor

The fork lift carriage frame assembly is a welded

and block in position.

assembly having two horizontal fork supports and two

e. Remove screws (11 and 13), spacer (9), and

vertical carriage supports. The carriage supports each

lock washers (10) from carriage supports.

carry two welded stud bearing assemblies, which ride in

f. Attach hoist to carriage frame assembly (7),

the inner mast channels. The backrest assembly is a

remove slack and balance load.

welded frame attached to the upper fork support. It

g. Disconnect chains (12) from carriage frame

serves to prevent loads from resting against the mast

assembly (7).

when the mast is tilted back.

h. Slowly lower carriage frame assembly out

10-29. Removal and Disassembly

bottom of inner mast and place on suitable supports,

a. Fully retract mast assembly and unlock and

bearing assemblies up.

remove carriage forks.

i. Noting size and quantity of shims (5 and 6),

b. Refer to figure 10-8 and remove and

remove bearings (4) and shims from welded studs (8) on

disassemble as follows:

carriage supports.

c. Using hoist, remove screws (3) and lock

washers (2) attaching backrest (1) to carriage

KEY to fig. 10-8:

8. Stud

1. Backrest

9. Spacer

2. Lock washer

10. Lock washer

3. Screw

11. Screw

4. Bearing

12. Chain link

5. Shim

13. Screw

6. Shim

7. Frame assembly

10-16