Pontiac tempest 1968 Service Manual page 583

9 - 2 6
1968 P O N T I A C S E R V I C E M A N U A L
Fig. 9-44 Adjusting Worm Bearing Preload
a. Using a 11/16"-12 point deep socket and inch
pound torque wrench, measure torque required to
turn worm shaft, keep wrench in motion when off
high point of gear. Torque required should be
7
in. lb.
b. If torque does not meet above specifications
loosen worm bearing adjuster lock nut (Fig. 9 - 4 4 )
and
turn adjuster to bring torque within 7 in. lb.
limits.
c. Tighten lock nut and recheck torque.
d. Remove 1 1 / 1 6 " socket and torque wrench.
6. Install pitman shaft adjusting screw and selec­
tive shim in pitman shaft (Fig. 9 - 4 1 ) .
NOTE: Screw must be free to turn, but have no
more than .002" end play. If end play of screw in
slot is too tight or too loose, select new shim to
give proper clearance. Shims are furnished in
four thicknesses: .063", .065", .067", and .069".
PITMAN SHAFT SHIM
BALI. N U T
Fig. 9-45 Position of Pitman Shaft and Ball Nut
7. Position pitman shaft seal on pitman shaft and
seat seal using suitable socket as a driver.
8. Install pitman shaft and adjusting screw with
sector and ball nut teeth positioned as shown in
Fig.
9 - 4 5 .
9
0
Install side cover and gasket on adjusting screw,
turning screw counterclockwise until it projects
through side cover 5 / 8 " to 3 / 4 " „
10. Install two cover attaching bolts. Tighten to
35
ft. lb.
1 1 . Tighten pitman shaft adjusting screw so that
teeth on shaft and ball nut engage but do not bind.
Final adjustment will be made later.
1 2 . F i l l steering gear with all- season steering
gear lubricant and install third cover attaching
bolt. Tighten to 35 ft. lb.
1 3 . Adjust sector preload and ball nut backlash
as follows:
a. Place a 1 1 / 1 6 " - 1 2 point socket and in. lb.
torque wrench over end of worm shaft.
b
e
Tighten pitman shaft adjusting screw as
necessary to obtain a reading of 7 in. lb. torque,
in excess of total thrust bearing preload, and
^ ^—
;
rr—
k
Fig. 9-46 Adjusting Worm G e a r Through High Point
(in Fixture J 5205) - G e a r Mounted