GMC 1989 Light Duty Truck Repair Manual page 121

A. J-7079-2
B. J-8524-1
C. B e aring w ith
Id e n tific a tio n
Tow ards Tool
D. W ood B lo ck
Figure 14— Installing the Needle Bearing
3. Ball guide (212), clamp (21
rack piston (214).
4. Stub shaft (251) into the valve body (250) (figure
• L ub rica te the stub sh aft (251) w ith pow er
steering fluid.
5. Valve spool (252) and seals (230, 231) into the valve
body (250).
• Lubricate the valve spool (252) and seals (230,
231) with power steering fluid before assem­
bling.
6 . Valve body (250), seal (249), worm shaft (248), bear­
ing races (246) and roller bearing (247).
7. Seal (239) on the adjuster plug (240).
8
. Needle bearing (241) in the adjuster plug. Use
J 8524-1 and J 7079-2 (figure 14).
9. Seal (242), washer (243), and retaining ring (244) in
the adjuster plug (240).
Important
• The retainer projections must not extend beyond the
washer (243) when the retainer ring (244) is seated.
The washer must be free to rotate.
10. Wormshaft, valve assembly into the steering gear
housing.
11. Adjuster plug (240) into the steering gear housing.
Use spanner wrench J 7624.
Adjust (Figures 15 through 22)
Tools Required:
J 7624 Spanner Wrench
J 7754-01 Torque Wrench
1. Bearing preload:
• Use tool J 7624. Turn the adjuster plug (240) to
the left until the plug and bearing (237) are
firm ly bottomed — about 27 N-m (20 ft. lbs.)
(figure 15).
• Mark the housing in line with one of the holes in
the adjuster plug (figure 16).
• Measure back (to the left) 13 mm (
re-mark the housing (figure 17).
B-06503
1
) and screws (210) to the
1
0).
1 2
/ -inch) and
POWER STEERING 3B3-7
240
240. A d ju s te r Plug
251. S tu b S h a ft
Figure 15— Bottoming the Adjuster Plug
A. M ark
B. A d ju s te r Plug
H ole
251. S tu b S h a ft
Figure 16— Marking the Housing
A. S e co n d M ark
B. R ule r
C. O rig in a l M ark
D. A d ju s te r Plug H ole
Figure 17 — R em arkin g th e H ousing
B-06531
B-06532
B-06533