Description: On cars with conventional
suspension systems, the steering knuckle includes a spindle and
connects the upper and lower ball joints. On cars with MacPherson
strut suspension systems, the steering knuckle connects the strut
assembly to the lower ball joint.
Purpose:
The steering knuckle is the pivot point of the steering
system,
which allows the wheels to
turn. On cars with conventional suspension systems, the steering knuckle’s
spindle locates and supports the inner and outer wheel bearings.
On cars with MacPherson strut suspension systems, the steering knuckle has an
opening to allow connection of the CV axle shaft to the wheel hub and bearing assembly.
Maintenance Tips/Suggestions: Have your car’s alignment checked once a
year. A bent or damaged steering knuckle affects proper wheel
alignment. The alignment process checks the steering knuckle angles
to ensure that they meet carmaker design specifications. Most SUVs,
pickups and rear-wheel-drive cars need regular front wheel bearing
maintenance. This can prevent expensive damage to the steering
knuckle’s spindle should a bearing seize. Have the bearings cleaned,
inspected and repacked
with fresh
lubricant every two years or 24,000 miles.
If the wheel bearings are exposed to any underwater conditions, even
for a short period, the bearings need to be serviced more
frequently. The wheel seals should also be replaced every time the
bearings are serviced. For best results, consult
a qualified service technician for professional advice and service on
your vehicle’s suspension and steering systems.
