GMC 1982 Light Duty Truck Service Manual page 250

3B2-6 MANUAL STEERING GEAR
4. Remove the steering gear to frame bolts and remove
the gear assembly.
5. C-K Models - Remove the flexible coupling pinch bolt
and remove the coupling from the steering gear
wormshaft.
Installation
N O TIC E: See N O T I C E on page 1 of this section
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 rein­
forcement. 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.
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 g ear in position, guiding the
w orm shaft 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.
Fig. 3B2-9--Removing Pitman Arm -Typical
T O O L — J - 5 5 0 4
T O O L — J - 6 6 3 2
3. Install the pitman arm onto the pitman shaft, lining up
the marks made at removal. Install the pitman shaft
nut or pitm an arm
specifications.
If a clamp type pitman arm is used, spread the pifenan
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 IT M 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 a tta c hing 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 d am age the
housing bore. See Fig. 3B2-10.
NOTICE: Inspect the lubricant in the gear for contami­
nation If the lubricant is contaminated in any way, the
gear must be removed from the vehicle and completely
overhauled as outlined in the Unit Repair Manual, or
damage to the gear could result.
4. Coat the new pitman shaft seal with Steering Gear
Lubricant meeting G M Specification G M 4673M (or
equivalent). Position the seal in the pitman shaft bore
and tap into position using a suitable size socket.
5. Remove the lash adjuster lock nut. Remove the side
cover from the pitman shaft assembly by turning the
lash adjuster screw clockwise.
pinch bolt and torque to