Chrysler 300M Service Manual page 40

LH
HUB / BEARING (Continued)
CAUTION: When installing hub and bearing assem-
bly into steering knuckle, be careful not to damage
the flinger disc (Fig. 9) on hub and bearing assem-
bly. If flinger disc becomes damaged, hub and bear-
ing assembly MUST not be used and MUST be
replaced with a new hub and bearing assembly.
(1) Install hub and bearing assembly onto stub
shaft and into steering knuckle until squarely seated
on face of steering knuckle
(2) Install the 3 hub and bearing assembly to
steering knuckle attaching bolts (Fig. 6). Equally
tighten all 3 mounting bolts until hub and bearing
assembly is squarely seated against front of steering
knuckle. Then tighten the 3 hub and bearing assem-
bly mounting bolts to a torque of 110 N·m (80 ft. lbs.)
CAUTION: The hub and bearing axle retaining nut
(Fig. 5) is a prevailing torque nut and cannot be re-
used. A NEW retaining nut MUST be used when
assembled.
(3) Install a NEW hub and bearing axle retaining
nut on the stub shaft (Fig. 5). Do not torque the
hub nut at this time.
(4) Install the brake rotor on the hub and bearing
assembly (Fig. 4).
(5) Install front brake caliper back over braking
disc and align with caliper mounting holes on steer-
ing knuckle and install the caliper to steering
knuckle guide pin bolts (Fig. 3). Refer to Disc Brake
Caliper in Brakes.
(6) With vehicle brakes applied, tighten the hub
and bearing axle retaining nut to 142 N·m (105 ft.
lbs.).
(7) Install wheel and tire assembly on vehicle.
Tighten the wheel mounting stud nuts in proper
sequence until all nuts are torqued to half specifica-
tion. Then repeat the tightening sequence to the full
specified torque of 135 N·m (100 ft. lbs.).
(8) Lower the vehicle to the ground.
(9) Check the wheel alignment toe setting on the
vehicle and reset if not within specifications.
KNUCKLE
DESCRIPTION - STEERING KNUCKLE
The steering knuckle is a single casting with legs
machined for attachment to the front strut assembly
and lower control arm ball joint (Fig. 1). The steering
knuckle also has machined abutments on the casting
to support and align the front brake caliper. The
knuckle also holds the hub and bearing, and supports
the driveshaft. The hub and bearing is positioned
through the center of the knuckle. The driveshaft
outer constant velocity (C/V) stub shaft is splined to
the center of the hub.
OPERATION - STEERING KNUCKLE
The steering knuckle provides for steering control
of the vehicle, supports the brake caliper and absorbs
the loads exerted during vehicle braking. It also sup-
ports the front (driving) hub and bearing and drive-
shaft stub axle assembly.
The steering knuckle pivots with the strut assem-
bly on the lower control arm ball joint, allowing the
vehicle to be steered.
DIAGNOSIS AND TESTING - STEERING
KNUCKLE
The steering knuckle (Fig. 11) is not a serviceable
component. Do not attempt to straighten or repair
the knuckle in any way. If it is determined that the
knuckle is bent or damaged, replace the knuckle.
Fig. 11 Steering Knuckle
1 - STRUT ASSEMBLY
2 - STUB AXLE
3 - BRAKE CALIPER MOUNTING BOSSES
4 - HUB/BEARING ASSEMBLY
5 - HUB/BEARING ATTACHING BOLTS
6 - LOWER CONTROL ARM
7 - FRONT KNUCKLE ASSEMBLY
FRONT SUSPENSION 2 - 7