GMC 1989 Light Duty Truck, Repair Manual, Page: 121 / 998

POWER STEERING 3B3-7
A. J-7079-2
B. J-8524-1
C. B e a rin g w ith
Id e n tific a tio n
Tow ards Tool
D. W o o d B lo c k
B-06503
240
240. A d ju s te r Plug
251. S tu b S h a ft
B-06531
Figure 14— Installing the Needle Bearing Figure 15— Bottoming the Adjuster Plug
3. Ball guide (212), clamp (21
1
) and screws (210) to the
rack piston (214).
4. Stub shaft (251) into the valve body (250) (figure 1 0).
• L u b 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. W ormshaft, valve assem bly into the steering gear
housing.
11. Adjuster plug (240) into the steering gear housing.
Use spanner w rench J 7624.
Adjust (Figures 15 through 22)
Tools Required:
J 7624 Spanner W rench
J 7754-01 Torque W rench
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 (
1
/
2
-inch) and
re-mark the housing (figure 17).
A. M ark
B. A d ju s te r Plug
H o le
251. S tu b S h a ft
B-06532
Figure 16— Marking the Housing
A. S e c o 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
B-06533
Fig u re 1 7 — R e m a rk in g th e H ousing