Chevrolet 1980 Light Duty Truck Service Manual page 198

3B2-6 M A N U A L STEERING GEAR
Fig. 3B2-8--Steering Gear Attachment, G-P Models
Installation
See NOTICE on page 1 of this section
NOTICE:
regarding the fasteners referred to in steps la, lc, Id,
le, 2b, 2c and 3.
1. C-K Models
a. Install the flexible coupling onto the steering gear
wormshaft, aligning the flat in the coupling with the flat on
the shaft. Push the coupling onto the shaft until the
wormshaft bottoms on the coupling reinforcement. Install
the pinch bolt and torque to specifications. The coupling
bolt must pass through the shaft undercut.
b. Place the steering gear in position, guiding the
coupling bolt into the steering shaft flange.
c. Install the steering gear to frame bolts and torque
to specifications.
d. If flexible coupling alignment pin plastic spacers
were used, make sure they are bottomed on the pins, torque
the flange bolt nuts to specifications and then remove the
plastic spacers.
Fig. 3B 2-9~R em oving Pitman Arm-Typica1
e. If flexible coupling alignment pin plastic spacers
were not used, center the pins in the slots in the steering
shaft flange and then install and torque the flange bolt nuts
to specifications.
2. P Models
a. Place the steering gear in position, guiding the
wormshaft into the universal joint assembly and lining up
the marks made at removal. If a new gear was installed, line
up the mark on the wormshaft with the slit in the universal
joint yoke.
b. Install the steering gear to frame bolts and torque
to specifications.
c. Install the universal joint pinch bolt and torque to
specification. The pinch bolt must pass through the shaft
undercut.
3. Install the pitman arm onto the pitman shaft, lining
up the marks made at removal. Install the pitman shaft nut
or pitman arm pinch bolt and torque to specifications.
If a clamp type pitman arm is used, spread the pitman
arm just enough, with a wedge, to slip the arm onto the
pitman shaft. Do not spread the clamp more than required
to slip over pitman arm onto the pitman shaft. Be sure to
install the hardened steel washer before installing the nut.
P ITM A N SHAFT SEAL REPLACEMENT
A faulty seal may be replaced without removal of
steering gear from C, G and P trucks by removing pitman
arm as outlined under Maintenance and Adjustments -
Steering Gear Adjustments and proceed as follows:
On K series vehicles remove the gear from the vehicle
first.
1. Rotate the steering wheel from stop to stop,
counting the total number of turns. Then turn back exactly
half-way, placing the gear on center (the wormshaft flat
should be at the 12 o'clock position).
2. Remove the three self-locking bolts attaching side
cover to the housing and lift the pitman shaft and side cover
assembly from the housing.
3. Pry the pitman shaft seal from the gear housing
using a screwdriver and being careful not to damage the
housing bore. See Fig. 3B2-10.
LIG H T T R U C K S E R V IC E M AN UAL