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GM COACH MAINTENANCE MANUAL
Sec. 16
Page 173
5. Tighten lock nut securely and again test
adjustment to make sure that lever shaft thrust
did not change when lock nut was tightened. Con-
nect steering drag link to Pitman arm.
When steering gear is properly adjusted, lever
shaft will have a slight amount of thrust.
This
thrust is necessary to insure proper lubrication,
because film of lubricant must separate lever
studs and walls of cam groove at all times or
rapid parts wear will result. A closer adjustment
will not correct any steering condition, but will
serve only to damage and wear parts and impair
operation.
ADJUSTING STUD ROLLER BEARING UNITS
The foregoing adjustments will suffice in most
cases; however,
it
may be necessary to adjust
stud roller bearing units in lever shaft. This ad-
justment necessitates removing steering gear from
vehicle as directed under "Steering Gear Removal"
and performing steps 1 through 4 under "Steering
Gear Disassembly," later in this section.
The roller bearings should be preloaded at all
times. Adjust to a heavy drag. Used units should
be set lighter than new replacement units but
never below a minimum stud turning torque of 4
to 8 inch-pounds.
Factory adjustments on new
units are within these limits.
Stud roller bearing adjustment may be accom-
plished as directed below. Refer to figure 2.
1. Thoroughly clean all parts of stud roller
bearing units and lever shaft in a suitable clean-
ing solvent.
2. Press outer bearing races into lever shaft
with flanged end of races toward Pitman arm end
of shaft. Coat inside surface of outer races with
soft cup grease or vaseline to hold rollers in po-
sition during assembly.
Install rollers,
studs,
inner races, lock washers, and lock nuts in bear-
ing outer races.
3. Place assembly in vise with stud nuts up,
and with vise jaws gripping the straight portion
of the studs. Extreme care must be used to pre-
vent damage to stud bearing surfaces.
4. Tighten stud nuts firmly, tapping both sides
of lever with soft metal hammer to seat bearings
properly.
Back off stud nuts slightly.
5. Remove from vise and remount in vise
with jaws gripping lever.
Use torque wrench on
nuts to rotate studs to test adjustment.
6. Vlhen adjustment is within correct limits,
lock adjustment by bending prong of lock washers
up against side of nuts. Bend the prong that is
at right angle to a side of the nut. DO NOT USE
A LOCK WASHER TWICE UNLESS PRONGS USED
BEFORE HA VE BEEN REMOVED.
7.
Lubricate stud roller bearing units with
lubricant specified in LUBRICATION (SEC. 13).
STEERING GEAR
1 Stud Nut
5 Lever Shaft Stud
2 Lock Washer
6
Roller Bearings
3 Bearing Inner Race
7 Lever Shaft
4 Bearing Outer Race
TP 2796
Figure
2-Lever Shaft Assembly
Components
STEERING GEAR OVERHAUL
Whenever, due to excessive wear,
steering
gear assembly cannot be adjusted properly, or if
during adjustment, "lumpy" or rough action is
noticed, it will be necessary to overhaul steering
gear assembly. Steering gear should be removed
from vehicle for all overhaul or repair operations.
STEERING GEAR REMOVAL
Perform following steps in order given to re-
move steering gear assembly from vehicle.
Re-
fer to figures 1 and 6.
1. Remove three screws
which attach horn
button cap retainer to steering wheel.
Remove
retainer, insulator, horn button, contact plate, and
bronze spring.
Pull horn connector assembly
carefully from steering wheel.
2. Remove steering wheel retaining nut; then
using steering wheel puller similar to one illus-
trated in figure 3, pull wheel off upper steering
shaft.
Remove key from keyway in upper shaft;
then remove switch operating plate and bearing
spring.
3.
Loosen switch clamp screw; then pull horn
contact and directional signal switch from upper
jacket tube.
NOTE: Horn and signal cables are long
enough to permit removal of parts without
disconnecting wires.
4. Remove steering column closure and dim-
mer switch adapter plates, with rubber seal, from
around steering column ate vehicle floor.
5. Disconnect drag link from Pitman arm by
removing cotter pin and nut from drag link end
stud and driving stud out of Pitman arm.
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