Hummer H1 Service Manual page 526

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®
SNAP
STUB SHAFT
RING DUST SEAL
STUB SHAFT
OIL SEAL
O-RING
STUB
SEAL
SHAFT
BEARING
BEARING
Figure 8-62: Adjuster Plug Assembly Sequence
SPACER
O-RING
Figure 8-63: Seating Adjuster Plug Retainer
05745159
ADJUSTER
PLUG
INNER
RACE
OUTER
RACE
RETAINER
THRUST
SPACER
PIN PUNCH
RETAINER
Steering System
Gear Housing Assembly
1. Lubricate wormshaft, stub shaft-valve body, rack piston,
and adjuster plug with power steering fluid.
2. Install wormshaft and stub shaft/valve body assembly in
gear housing. Be sure wormshaft thrust bearings are not
displaced during installation.
3. Install adjuster plug in gear housing. Tighten plug only
enough to secure it in housing (2-3 threads).
4. Install rack piston as follows:
a. Place socket and ratchet on stub shaft.
b. Insert rack piston into housing until wormshaft
contacts arbor tool previously installed in rack piston
(Figure 8-40). Hold arbor tool firmly in place during
installation.
c. Turn stub shaft clockwise to feed wormshaft into rack
piston. Wormshaft will push arbor tool out as it
engages piston and recirculating balls.
NOTE: Maintain pressure on the arbor tool at all times during
installation. The rack piston will have to be removed and com-
pletely reassembled if even one bearing falls out during assem-
bly.
5. Continue turning stub shaft until wormshaft is fully
engaged in rack piston.
6. Install plug in rack piston (Figure 8-39). Tighten plug to
111 lb-ft (150 N•m) torque.
7. Install end plug O-ring in gear housing and install housing
end plug (Figure 8-33).
8. Install end plug retaining ring. Position ring ends so
neither one is aligned with punch access hole in gear
housing (Figure 8-64).
9. Position new gasket on side cover and assemble cover and
pitman shaft.
10. Lubricate pitman shaft and sector teeth with power
steering fluid.
11. Center rack piston in housing by turning stub shaft as
needed.
12. Insert pitman shaft into housing. Be sure that shaft sector
teeth are centered in rack piston teeth.
13. Align and seat side cover on gasket and housing.
14. Install and tighten side cover bolts to 44 lb-ft (60 N•m)
torque.
15. Install but do not fully tighten adjuster screw lock nut (nut
will be tightened during gear adjustment).
16. Adjust steering gear as described in following adjustment
procedures.
8-35
4-1-00