GMC 1990 Light Truck Repair Manual page 118

3B3-4 POWER STEERING
___________________________________ B6502
Figure 8—Removing the Needle Bearing
Valve Assembly
2. Plug (219). Turn stud shaft (251) to the left only
until the plug is forced out of the cylinder.
3. Seal (218).
4. Plug (215) from the rack piston (214) (figure 4).
5. Bolt (226).
6. Sector shaft assembly (221, 222, 225, 227).
7. Dust seal (253) (figure 1).
8. Retaining ring (205) with J 4245.
9. Washers (207) and seal (254) (figure 1).
10. Bearing (209). If necessary, use tool J 6278 (figure
5).
11. Rack piston (214) and balls (213).
• Insert tool J 21552 into the rack piston bore
with the pilot of the tool seated into the end of
the worm (248).
Assembly
• Hold the tool against the worm and turn the
stub shaft to the left. The rack piston (214) will
be forced onto the tool.
• Hold the tool and pull the rack piston toward
the handle until it is against the flange on the
tool. This will prevent the end circuit balls from
falling out.
12. Adjuster nut (245).
13. Adjuster plug (240) using J 7624 (figure 6).
• Retaining ring (244) using J 4245.
• Washer (243), seal (242) and bearing (241).
• Bearing retainer (234). Pry the retainer with a
screwdriver at the raised area (figure 7).
• Seal (239) and needle bearing (241). Use
J 8524-1 and J 7079-2 (figure 8).
14. Valve (250) and wormshaft (248) as an assembly,
with both races (246) and bearing (247).
• Wormshaft (248) from valve assembly (figure
9).
• Races (246) and bearing (247) from the worm­
shaft (248).
• Seal (249).