Hummer H1 (2006+). Manual — part 250

8-16

Steering System

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Assembly

1.

Slide the bearing onto the shaft and secure it with the retaining ring (Figure 8-16).

2.

Slide the shaft into the tube and bracket assembly.

3.

Install the six stakes into the tube and bracket assembly.

4.

Secure the lock and the switch housing assembly to the steering column with the two screws.

5.

Connect the multi-switch assembly to the lock and switch housing with the two screws (Figure 8-14).

STEERING WHEEL HUB COVER AND STEERING COLUMN SHROUD REPLACEMENT

Removal

1.

Remove the three screws holding the front half of the steering wheel hub cover to the rear half.

2.

Remove the steering wheel.

3.

Remove the rear half of the cover.

4.

Remove the five screws holding the lower steering column shroud to the upper shroud.

5.

Loosen the two pivot bolts at the rear of the steering column mounting bracket.

6.

Remove the thru-bolt from the front of the mounting bracket. The steering column will pivot downward.

7.

Remove the upper shroud.

Installation

1.

Place the upper shroud in position over top of the steering column.

2.

Pivot the steering column upward and secure with the thru-bolt, three washers, lockwasher and the locknut.

3.

Tighten the locknuts on the pivot bolts.

4.

Secure the lower shroud to the upper shroud with the five screws.

5.

Place the rear half of the steering wheel hub cover over the shaft.

6.

Install the steering wheel.

7.

Secure the front half of the shroud to the rear half with the three screws.

IGNITION SWITCH LOCK CYLINDER REPLACEMENT

Removal

1.

Disconnect the battery ground cable.

2.

Remove the close-out panel.

3.

Remove the five screws and lower the steering column shroud (Figure 8-17).

4.

Disconnect the lock cylinder connector from the ignition switch connector.

5.

Turn the ignition switch to the RUN position.

6.

Depress the lock cylinder detente pin through the detente pin hole and remove the lock cylinder from the steering column.

Installation

1.

Insert the lock cylinder into the steering column (Figure 8-17).

2.

Turn the ignition switch to the LOCK position.

3.

Connect the lock cylinder connector to the ignition switch connector.

4.

Secure the lower steering column shroud to the steering column with the five screws.

5.

Install the close-out panel.

6.

Connect the battery ground cable.

7.

Verify that the ignition switch lock cylinder operates properly.

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Steering System 8-17

5745804

Figure 8-17: Ignition Switch Lock Cylinder Replacement

LOCK

CYLINDER

LOCK CYLINDER

DETENT PIN

DETENT

PIN HOLE

IGNITION

SWITCH

CONNECTOR

LOWER

SHROUD

LOCK

CYLINDER

CONNECTOR

8-18

Steering System

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IGNITION INTERLOCK CABLE AND SOLENOID REPLACEMENT

Removal

1.

Remove the five screws and the lower shroud from the steering column (Figure 8-18).

Figure 8-18: Steering Column Shrouds

2.

Loosen the two locknuts securing the steering column to the mounting bracket.

3.

Remove the locknut, lockwasher, three washers and the bolt securing the steering column to the mounting bracket.

4.

Lower the steering column and remove the upper shroud.

5.

Remove the screw and the cotter pin at the interlock cable solenoid, remove the screw from the ignition switch.

6.

Remove the interlock cable.

INTERLOCK
SOLENOID

INTERLOCK
CABLE

SHROUD

SHROUD

MULTI-SWITCH

LOCK
CYLINDER

COTTER

PIN

NUT

6-1-05

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Steering System 8-19

5745804

7.

Remove the nut from the front of the interlock solenoid, disconnect the electrical connector and remove the solenoid.

Installation

1.

Install the interlock solenoid, secure with the nut, connect the electrical connector.

2.

Install and secure the interlock cable to the ignition switch and the solenoid bracket with the screws.

3.

Install the cotter pin.

4.

Position the upper steering column shroud on the steering column (Figure 8-18).

5.

Raise the steering column and secure the steering column on the mounting bracket with the bolt, three washers, lockwasher,
and the locknut. Tighten the locknut to 31 lb-ft. (42 N•m).

6.

Tighten the two locknuts securing the steering column to the mounting bracket. Tighten the locknuts to 10 lb-ft (14 N•m).

7.

Secure the lower steering column shroud to the upper shroud with the five screws.

Test

1.

With the transmission lever in P, turn the ignition key to the run position.

2.

Activate the brake switch and move the transmission lever to N.

3.

Without turning the ignition key off, move the transmission shift lever to P.

4.

Turn the ignition key off. To pass the test, it should not be possible to move the transmission lever out of P unless an extremely
high effort is applied.

5.

Turn the ignition key on. To pass the test, it should not be possible to move the transmission lever out of P unless an extremely
high effort is applied.

6.

Activate the brake switch. To pass the test, the transmission lever should be moved from P to N with normal shift effort.

7.

Turn the ignition key off. To pass the test, it should not be possible to remove the ignition key while the transmission lever is
in N.

8.

Move the transmission lever to P. To pass the test, it must be possible to remove the ignition key with normal effort applied to
the ignition key.

STEERING GEAR REPLACEMENT

Removal

NOTE: Ensure the front wheels are in the straight-ahead position. Have a drainage container ready to catch fluid.

1.

Disconnect the two power steering lines from the steering gear.

2.

Raise and support the front of the vehicle.

3.

Turn the steering wheel left and right several times to bleed off the power steering fluid.

4.

Remove the bolt and nut on the intermediate shaft yoke at the steering gear and disconnect the intermediate shaft from the
steering gear.

5.

Remove the drive line protection.

6.

Remove the four 17mm sway bar to frame bolts and move the bar for clearance.

7.

Lift the locking tabs on the steering gear shaft bolt.

8.

Remove the 14mm socket head bolt from the steering gear shaft (Figure 8-2). Using puller CH-47965, remove the pitman arm
from the steering gear shaft (Figure 8-20).

9.

Remove the three bolts, lockwashers, washers, and the steering gear from the frame.

Installation

WARNING: The gear box mounting bolts, washers and the spacer must be installed in the proper position or gear
box damage could result.

1.

Clean all the loctite residue from the bolts and the gear box if the original gear box is reused. Apply loctite 242 liberally to the
bolt mounting holes in the gear box.

NOTE: The upper bolt with the spacer DOES NOT use a flat washer, only a lockwasher.

11-1-05