PT Cruiser L4-2.4L (2008)
Front Steering Knuckle: Description and Operation
DESCRIPTION
The knuckle (2) is a single casting with legs machined for attachment to the front strut assembly on the top, lower control arm ball joint on the bottom,
and steering linkage on the trailing end. The knuckle also has two machined, drilled and tapped legs on the leading end casting to support and align the
front disc brake caliper adapter.
The knuckle supports the wheel bearing and hub (1). The wheel hub is pressed into a sealed-for-life wheel bearing that is pressed into the knuckle. A
retainer plate also holds the bearing in place. The hub supports the driveshaft outer constant velocity (C/V) joint. Each is splined and meshes in the
center of the hub. The outer C/V joint is retained to the hub using a nut. The nut is locked to the outer C/V stub shaft using a nut retainer and cotter pin.
The wheel bearing is a Unit 1 type cartridge bearing that requires no maintenance. The wheel bearing can be serviced separately from the hub.
The hub has five studs pressed into its flange.
