254 SUSPENSION AND STEERING
switch and ignition lock system. This system
prevents the removal of the ignition key un-
less the automatic transmission is in Park or
the manual transmission is in Reverse, and
the key is in the "Lock" position. In this po-
sition, a rod and lock plate mechanism lock
the steering wheel and shift lever.
The power rack and pinion steering system
has a rotary control valve which directs hy-
draulic fluid, coming from the hydraulic pump,
to either side of the rack piston. The integral
rack piston is attached to the rack and con-
verts hydraulic pressure to a linear force which
moves the rack left or right. The .force is then
transmitted through the inner and outer tie
rods to the steering kunckles which turn the
wheels.
Lip seals, which seal rotating shaft, require
special treatment. This type of seal is used on
the steering rack and pinion at the rack, at
the pinion and valve, and on the drive shaft
of the pump. When leakage occurs in one of
these areas, always replace the seal(s), after
inspecting and thoroughly cleaning the seal-
ing surfaces. Replace the shaft only if very
severe pitting is found except for the rack. If
the rack shows evidence of corrosion, it should
be replaced. If the corrosion in the lip seal
contact zone is slight, clean the surface of the
shaft with crocus cloth. Replace the shaft only
if the leakage cannot be stopped by smooth-
ing with crocus cloth first.
Steering Wheel
REMOVAL AND INSTALLATION
1963-67 Standard Wheel
1. Disconnect the battery ground cable.
2. Pry off the horn cap with a small screw
driver.
3. Remove the steering shaft nut and
washer.
4. Install a wheel puller in the two
threaded holes provided. Remove the steer
ing wheel.
5. To install, align the wheel in a straight,
up-and-down position.
6. Install the washer and nut on the shaft,
and while holding the wheel, tighten the nut
to 35-40 ft. Ibs.
7. Reinstall the contact assembly and horn
cap.
1968-76 Standard Wheel
1. Disconnect the battery ground cable.
2. Pry the horn cap off with a small screw
driver and remove the upper horn contact.
3. Remove the six steering wheel retain
ing screws and remove the wheel.
NOTE:
To remove the wheel for turn sig-
nal switch service, follow Steps 3-6 of the
"1963-67 Standard Wheel" procedure.
Tighten the nut to 30ft. Ibs. On 1975-76
models, it is necessary to remove the snap-
ring from the steering shaft first. Don't for-
get to install the snap-ring after tightening
the nut.
4. To install, attach the wheel to the hub
with the six screws.
5. Install the upper horn contact and the
horn cap.
HORN
CAP,
Standard steering wheel—1968-76
1965-67 Telescoping Wheel
1. Disconnect the battery ground cable.
2. Pry off the horn cap with a small
screwdriver and remove the horn contact as
sembly.
3. Remove (he lock screw-to-lock knob
retaining screws, and remove the lock screw,
lock knob, and the spacer.
4. Remove the six steering wheel-to-hub
screws and remove the wheel.
5. Replace the steering wheel on the hub
and install the six retaining screws.
Standard steering wheel—1963-67
HUB
INSULATOR
EYELET.
SPRING
