MCi Crusader II 1989 Maintenance Manual page 7

Date 1-1-89
MC-9 MAINTENANC.E.,MANLJP.L-
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.FRONT .AXLE
EF:FECTIVE W:ITH UNIT 41089
STEERING GEAR
FRONT AXLE
PRIOR TO UNIT 41089
STEERING ARM
Figure 1-1. Front Axle Assemblies.
FRONT AXLE ASSEMBLY
DESCRIPTION
Effective with unit41089 the front axle assembly is a tubu,lar
type of Reversed Elliot design. Axle construction consists of a
tempered seamless steel tube
with
forged steel king pin ends.
On units prior to 41089, the front axle is a forged steel drop
center I-beam type. King pin ends are integral parts of the axle
center. See figure 1-1.
Steering knuckles have grease fittings in both king pin bosses
f~r
lubrication of the knuckle bushings. The bushings are of the
sy Steer" type on all models after September 1986. Prior to
·that. the bushings are bronze. Covers and prugs prevent dust
and moisture from entering bushings and serve as seals.
The brake shoe spider is doweled and bolted to the steering
knuckle. Dowel pins are also used to locate air suspension
mountings.
The two steering knuckle assemblies are connected to each
other by a tie rod. Tie rod is threaded at each end and held in
position by clamp bolts. i":iight-hand and left-hand threads are
provided on the tie rod to facilitate toe-in adjustment. Stop
screws installed at each end of axle center limit turning angle of
front wheels.
On the tubular style axles. to detect development of fatigue
cracks. approximately two quarts of diesel fuel·are installed in
the hollow tube section. Any axle which leaks should be
replaced.
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