Pontiac tempest 1968 Service Manual page 595

9-38 1968 P O N T I A C SERVICE MANUAL
J 7576
OR
j "3947
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J . •
B | | B f
J 7 5 3 9
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5 2 0 5
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F i g . 9-68 Installing Rack Piston Nut
on Firebird, Tempest, Pontiac Catalina without air
conditioning and tool J 7576 on all other models.
CAUTION: Be certain that no balls drop out.
4. Remove arbor and sleeve.
REPLACE PITMAN SHAFT GEAR AND SIDE COVER
1. Turn worm shaft until center groove of rack-
piston is aligned with center of pitman shaft needle
bearing.
2 I n s t a l l new side cover O-ring seal.
3. Install pitman shaft gear so that center tooth of
gear meshes with center groove of rack-piston.
Make sure that side cover O-ring seal is in place
before pushing cover against housing.
4. Install side cover screws and tighten to 30 ft. lb.
torque.
5. Install end plug in rack-piston nut, using 1/2"
square drive. Tighten to 75 ft. lb. torque.
REPLACE HOUSING LOWER END PLUG
1. Install new housing end plug O-ring seal.
2. Insert end plug into gear housing and seat
against O-ring seal. Slight pressure may be nec­
essary to seat end plug properly.
3. Install end plug retainer ring so end of ring ex­
tends over 1/2" beyond ring removal assist hole
(Fig. 9-69).
ADJUST PITMAN SHAFT PRELOAD
THROUGH CENTER HIGH POINT
NOTE: DO NOT use a torque wrench having max­
imum torque reading of more than 100 lb. in.
When taking following torque readings, take read­
ing pulling torque wrench to right and reading
pulling torque wrench to left. Total both readings
and take one-half of this total as average torque.
Use a 3/4"-12 point deep socket and inch-pound
torque wrench (Fig. 9-70), take a reading through
center position to determine total drag, thrust bear­
ing adjustment, and rack and worm preload. Adjust
lash adjuster so torque is 4.0 to 8.0 in. lb. in excess
of total reading found above.
Total over center preload must not exceed 18 in.
lb. torque through center high point when rotating
worm shaft through an arc of approximately 20°.
Tighten lash adjuster lock nut to 25 ft. lb. torque.
Recheck preload after lock nut has been tightened.
REPLACE FLEXIBLE COUPLING
1. Install coupling on stub shaft aligning flat sur­
face on the stub shaft serrations with flat section in
flange hole.
J 5205
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J 6459
F i g . 6 - 6 9 Installing End Plug Retainer Ring
F i g . 9-70 Adjusting Pitman Shaft Preload