GMC 1982 Light Duty Truck Service Manual page 249

improper adjustment; the gear must be disassembled
and inspected for replacement of damaged parts.
9. Adjust "over-center preload" as follows:
a. Turn the steering wheel gently from one stop all the
way to the other carefully counting the total number
of turns. Turn the wheel back exactly half-way, to
center position.
b. Turn the lash adjuster screw clockwise to take out all
lash between the ball nut and pitman shaft sector
teeth and then tighten the locknut.
c. Check the torque at the steering wheel, taking the
highest reading as the wheel is turned through center
position. See Specifications for proper over-center
preload.
d. If necessary, loosen locknut and readjust lash ad­
juster screw to obtain proper torque. Tighten the
locknut to specifications and again check torque
reading through center of travel. If maximum speci­
fication is exceeded, turn lash adjuster screw coun­
terclockwise, then come up on adjustment by turning
the adjuster in a clockwise motion.
10. Reassemble the pitman arm to the pitman shaft, lining
up the marks made during disassembly. Torque the
pitman shaft nut 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 shaft with hand pressure.
Do not ham m er the pitman arm onto the pitman shaft.
Be sure to install the hardened steel washer before
installing the nut.
STEERING GEAR
Rem oval
1. Set the front wheels in stra ig h t ahead position by
driving vehicle a short distance on a flat surface.
Fig. 3B2-7~Steering G ear Attachm ent, C-K M odels
11. Install the horn button cap or shroud and connect the
battery ground cable.
12. Lower the vehicle to the floor.
STEERING GEAR H IG H PO INT CENTER ING
1. Set front wheels in straight ahead position. This can be
checked by driving vehicle a short distance on a flat
surface to determine steering wheel position at which
vehicle follows a straight path.
2. With front wheels set straight ahead, check position of
m ark on w orm shaft designating steering gear high
point. This mark should be at the top side of the shaft at
coupling lower clamp.
3. On C, G and P series, if the gear has been moved off
high point when setting wheel in straight ahead
position, loosen adjusting sleeve clamps on both left and
right hand tie rods. Then turn both sleeves an equal
number of turns in the same direction to bring gear
back on high point.
Turning the sleeves an unequal number of turns or in
different directions will disturb the toe-in setting of the
wheels.
4. On K series, if the gear has been moved off high point
when setting wheels in straight ahead position, loosen
adjusting sleeve clamps on the connecting rod. Then
turn sleeve to bring gear back on high point.
5. R eadjust
necessary).
6. Be sure to properly orient sleeves and clamps when
fastening
specifications.
ON-VEHICLE SERVICE
2. Remove the flexible coupling to steering shaft flange
bolts (C-K models) or the lower universal joint pinch
bolt (P models). Mark the relationship of the universal
yoke to the wormshaft.
3. Mark the relationship of the pitman arm to the pitman
shaft. Remove the pitman shaft nut or pitman arm
pinch bolt and then remove the pitman arm from the
pitman shaft using Puller J-6632 (Fig. 3B2-9).
MANUAL STEERING GEAR
12 o'clock position and lined up with the mark in the
toe-in as outlined
and torqueing
Fig. 3B2-8--Steering G ear Attachm ent, G-P M odels
3B2-5
in Section 3A (if
clamps to proper