Section III. OVERHAUL OF STEERING AXLE

TM 10-3930-609-35

for axle shaft endplay with a dial indicator. If no endplay

r. Install hubs on axle shafts, using keys. Secure

is indicated, add shims until endplay can be measured;

hubs with washers and nuts. Tighten nuts securely and

then, remove shims to obtain required bearing

insert cotter pins through ends of axle shafts.

preloading.

s. Install hub caps.

Install brake tubing between fitting on axle

t. Install front wheels (TM 10-3930-609-12).

housing and adapter on brake assembly at each end of

Lubricate drive axle and adapter after

drive axle.

reinstallation on truck (LO 10-3930-609-12).

Section III. OVERHAUL OF STEERING AXLE

3-15. Description of Steering Axle (fig. 3-4)

b. Inspect threaded parts for stripped or damaged

The steering axle comprises a forged axle, two steering

threads.

arms (to which the rear truck wheels mount), a bellerank

c. Inspect tierods for damaged ends. Also check

and axle mounting blocks. The bellcrank connects to

that tierods are not bent or deformed.

the steering gear by means of a draglink. Conventional

d. Inspect axle, bellcrank, spindle pins and

tierods connect the bellcrank to the two steering arms.

steering arms for cracks and distortion.

e. Inspect bearings in bellcrank and bearings in

3-16. Removal of Steering Axle

steering arms and bearings in axle forging for wear.

Overhaul of the steering axle required removal of the

axle from the truck. Refer to paragraph 2-23 for

3-20. Repair and Replacement of Parts Removed

removal of steering axle.

from Steering Axle

a. If practicable, repair damaged threads with a tap

3-17. Disassembly of Steering Axle (fig. 3-4)

or thread chaser.

a. Remove two neoprene axle blocks from

b. Replace all parts that are cracked, worn,

trunnions on axle.

distorted or deteriorated.

b. Remove rear wheels (TM 10-3930-609-12).

c. Remove cotterpins and nut from outer ends of

3-21. Reassembly of Steering Axle

tierods, and disengage tierod end from steering arms

a. Install spindle bearings in axle forging; then,

and bellcrank.

pack spindle bearings with grease, GAA (LO 10-3930-

d. Remove retaining ring which secures bellcrank

609-12).

to axle; then, remove washer and lift bellcrank with

b. Position steering arms in yokes of axle and

bearings and lower washer off axle.

insert spindle pins. Secure spindle pins with screws,

e. Press bearings out of bellcrank only if

washers and nuts.

replacement is Tequired.

c. Press bearings into bearing hole in bellcrank.

f. Remove nuts, washers and screws which secure

d. Place washer on trunnion of axle, then, install

spindle pins; then, drive out spindle pins and remove

bellcrank on trunnion. Secure bellcrank with washer and

steering arms from axle.

retaining ring.

g. If spindle bearings require replacement, press

e. Lubricate bellcrank with grease, GAA, using

bearings out of axle.

lubrication fitting in bellcrank (LO 10-3980-609-12).

f. Insert ends of tierods into steering arms and

3-18. Cleaning Parts Removed from Steering Axle

bellcrank and secure tierod ends with nuts. Secure nuts

a. Wash all metallic parts in SD and dry with

with cotterpins.

compressed air under moderate pressure. Be sure to

g. Place axle blocks on axle trunnions.

clean parts thoroughly to facilitate inspection.

h. Install rear wheels (TM 10-3930-609-12).

b. Clean neoprene axle blocks with cloth or cotton

waste moistened with SD.

3-22. Installation and Adjustment of Steering Axle

Install steering axle as described in paragraph 2-23.

3-19. Inspecting Parts Removed from Steering Axle

After installation, adjust tierods (TM 10-3930-609-12).

a. Inspect neoprene axle blocks for cracking,

deformation, splitting and deterioration.

3-8