Pontiac tempest 1968 Service Manual page 582

S T E E R I N G
9-25
•t
J 5 2 0 5
SIDE C O V E R
A D J U S T I N G
S C R E W
4
F i g . 9-40 Removing Side Cover
J 1614
H O U S I N G
F i g . 9-42 Removing Pitman Shaft Bushing
REPLACE UPPER OR LOWER BEARING CUPS
U P P E R CUP
Remove gear housing upper seal assembly. Then
using suitable punch, remove upper cup from gear
housing. Install bearing cup in housing using J 5755,
replace worm shaft seal.
LOWER CUP
1. Remove lower bearing retainer from bearing
adjuster. Bearing cup is a slip fit and will come out
with lower bearing and Belleville washer
Q
2
0
Install Belleville washer, bearing cup, lower
bearing and retainer in worm bearing adjuster.
insert 6 balls in each return guide using petrolatum
to hold balls in place. Install return guide clamp
and screw.
CA UTION: Do not rotate worm shaft while in­
stalling balls, since balls may enter crossover
passage between circuits. This will cause im­
proper operation of ball nut.
3. Place upper bearing on worm shaft. Center
ball nut on worm, then slide worm shaft, bearing and
nut into housing.
4. Install adjuster in housing.
NOTE: Adjuster should be installed just tight
enough to hold bearing races in place. Install
adjuster lock nut loosely.
ASSEMBLE STEERING GEAR
NOTE: All seals, bushings and bearings should be
prelubricated before assembly.
1. Position ball nut on shaft so that deep side of
teeth are located as shown in Fig. 9-43.
2. Install 19 balls in each circuit of ball nut (rock
steering shaft slightly to aid in installing balls) and
PITMAN SHAFT
C L E A R A N C E
\
|
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
I- ,
*
SHIM j
ADJUSTING
• SCREW
5. Slip flexible coupling assembly on shaft and turn
steering gear from one extreme to the opposite to
make certain there are no unusual binds and remove
flange assembly.
NOTE: Never allow ball nut to strike ends of ball
races in worm due to possibility of damage to ball
guides.
L O W E R E N D
UPPER E N D
^ ' DEEP SIDE OF TEETH
Fig. 9-41 Pitman Shaft and Adjusting Screw
Fig. 9-43 Ball Nut Properly Installed on Shaft