Chapter 9. STEERING SYSTEM REPAIR INSTRUCTIONS

TM 10-3930-621-34

CHAPTER 9

STEERING SYSTEM REPAIR INSTRUCTIONS

Section I. STEERING GEAR ASSEMBLY

figures when disassembling.

Disassembly should

9-1. Description

proceed only as far as necessary for repair and

The power steering system consists of a steering gear

replacement.

assembly, power steering cylinder (sec. II), and a

b. Horn Button.

steering axle assembly (ch 7, sec.

II).

Major

(1) Place steering gear assembly in vise,

components of the steering gear assembly are a wheel,

steering wheel up.

shaft, and control assembly. When the wheel and shaft

(2) Push down on horn button cover (1) and turn

are turned, hydraulic fluid is ported from the control

to right.

assembly, through tubing, to either the front or rear of the

(3) Remove horn button cover (1), button (2),

power steering cylinder.

contact cup (3), spring (4), and contact cap (5).

9-2. Removal

(4) Separate horn button wire (33) from base

a. Remove floor and toe plates (TM 10-3930- 621-12).

plate (6).

b. Tag hydraulic hoses and disconnect from steering

(5) Remove screws (7) from base plate (6) and

gear assembly. Plug hoses immediately to prevent loss

remove base plate, contact spring (8), and contact

of fluid or entrance of foreign material.

washer (9).

c. Disconnect horn button wire at brush assembly

(6) Remove steering wheel nut (10) and lock

connector (13, fig. 9-1).

washer (11) from steering shaft (32).

d. Remove clip at the upper part of column.

(7) Using wheel puller, remove steering wheel

e. Remove screws (25, fig. 8-2), lock washers (24),

(12) from shaft (32).

and flat washer (23) attaching steering gear support (22)

(8) Remove two screws (2, fig. 8-3) and lock

to a bracket which is welded to the track frame.

washers (1) attaching steering gear support (22) to

f. Lift steering gear assembly with support up and out

steering gear assembly.

of truck and place in clean working area for disassembly.

(9) Remove steering gear support (22) with

9-3. Disassembly

brake pedal stop (3) attached from steering column (36,

a. General. Refer to figure 9-1 with applicable

fig. 9-1).

9-1