Hummer H1 Service Manual page 506

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POWER STEERING PUMP AND PULLEY
REPLACEMENT
Removal
1. Disconnect return lines and high pressure line from back
of pump (Figure 8-24).
2. Remove serpentine belt from power steering pump pulley.
3. Using puller J–25034-C or equivalent, remove pulley from
pump.
4. Remove three bolts going through bracket into front of
pump (Figure 8-24).
Installation
1. Apply non-hardening thread sealant to studs on back of
pump and secure support bracket with two nuts. Tighten
nuts to 45 lb-ft (61 N•m) (Figure 8-24)
2. Maneuver pump into position behind power steering
bracket.
3. Secure pump to mounting bracket with three bolts.
4. Secure support bracket to block with bolt.
5. Connect two return lines to power steering pump
(Figure 8-24).
PULLEY
05745159
POWER STEERING
FLUID RESERVOIR
MOUNTING BRACKET
POWER
STEERING
PUMP
Figure 8-24: Power Steering Pump Mounting
Steering System
6. Check condition of O-ring seal and connect high pressure
line to back of pump.
CAUTION: In step 7, do not attempt to drive the pulley onto
the pump shaft with a hammer. The pulley and pump ring will
be damaged.
7. Press pulley onto pump using pulley installer J–25033-C
or equivalent. Pulley should be flush +/- 0.25 mm (0.010
inch) with the end of the power steering pump shaft.
8. Purge air from power steering system.
9. Start engine and check for leaks.
POWER STEERING
SUPPORT BRACKET
8-15
4-1-00