TRUCK SERVICE MANUAL
turning freely about the pin. Bushings are of bronze or
teflon material, although some nylon bushings may be
The front axles mentioned herein are the heavy
encountered in service.
All bushings (EXCEPT
duty I-beam type, Fig. 1.
TEFLON) contain grooves which allow grease to flow
uniformly to high pressure areas. A lubricator is installed
Construction details for the most part are similar;
in both upper and lower knuckle pin bosses or knuckle
however, where major variations exist, these are
pin caps, Fig. 3.
AXLE CENTER SECTION
An "I-beam" type center section machined from
heat treated steel forging is used for these axles. Spring
pads are integral with the "I-beam".
STEERING KNUCKLE KING PIN
The axles are equipped with straight king pins
which employ one or two flats and are held in position by
tapered draw keys, Fig. 2.
Wheel and Hub Removal
1. Raise front end of vehicle so that tires clear floor.
Block up securely at this position and remove
(Do not attempt to disassemble or
perform knuckle repair with vehicle supported by
2. Two types of wheel bearing adjusting nut lock
arrangements are used on the axles covered in
this section. Removal of these are as follows:
STEERING KNUCKLE BUSHINGS
Steering knuckles are bushed--in-t-he upper and lower
pin bosses to assure