Gear Reassembly - GMC T Series 1994 Repair Manual

GEAR REASSEMBLY

Figures 31 thru 39
Tool Required:
J Shaft Seal Protector
6222-A
J 7624 Spanner Wrench
J 7754-01 Torque Wrench
Assemble
❖
• Lubricate the worm (33), bearing (35), and
races (34) with power steering fluid.
1. Race (34), bearing (35), and race (34) over the end of
the worm (33). The race should be installed with the
angled surfaces parallel to each other (see Figure 32).
• Lubricate the valve body seals (26) and
the new shaft cap and seal (32) with power
steering fluid.
• Align the narrow notch in the valve body with
the pin in the worm shaft cap (see Figure 33).
2. Valve (28) and worm (33) assembly into the gear
housing (6). Apply pressure only to the valve body
when installing (see Figure 34).
• The valve body is properly seated when the
oil return hole in the housing is entirely
uncovered.
• Place tool J 6222-A over the end of the stub
shaft.
3. Adjuster plug (19) assembly into the housing, until
it seats against the valve body (28).
Adjust
1. Bearing preload:
• Use tool J 7624-01. Turn the adjuster plug
(19) clockwise until the plug and bearing
(22) are firmly bottomed—about 27 N«m
(29 lb. ft.).
• Mark the housing in line with one of the holes
in the adjuster plug.
• Measure back (counterclockwise) 13 mm
(1/2 inch) and re-m ark the housing
(see Figure 35).
• Rotate the adjuster counterclockwise until
hole in adjuster is in line with the second
mark (see Figure 35).
NOTICE:
See "Notice" on page 1 of this section.
• Install the nut (14) and torque to 108 N»m
(80 lb. ft.).
maintain alignment on the hole with the mark.
• Check the turning torque using a 3/4"
12-point socket and an inch-pound torque
wrench. Use tool J 7754-01 (see Figure 36).
• Push rack piston (with teeth toward pitman
shaft openings) into the housing until the tool
contacts the center of the worm.
Hold the adjuster plug to
Figure 32 Worm Shaft and Bearing