Hummer H1 (2006+). Manual - part 269

9-54 Axles, Suspension and Frame

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15. Using the clamp nut socket J–42545, tighten the clamp nut to 40 lb-ft. (54 N•m). Rotate the spindle five revolutions both

clockwise and counterclockwise to seat the bearings.

16. Loosen and retighten the clamp nut to 25 lb-ft. (34 N•m).

NOTE: Ensure that the clamp nut does not move while the clamp nut lock screw is being tightened.

17. Using a hexagon-head socket and a pre-set calibrated torque wrench J-42546, tighten the clamp nut lock screw to 90 lb-in. (10

N•m).

18. Mark a temporary line across the end of the spindle and the clamp nut.

NOTE:  Using a feeler gauge, ensure a gap exists between the clamp nut gap surfaces. If no gap exists, remove and discard the
clamp nut lock screw and the clamp nut. Acquire a new screw and nut and repeat steps 12-18.

19. Using a preset torque wrench J-42547, apply pressure to the clamp nut in a counterclockwise direction until the torque wrench

clicks, indicating 90 lb-ft. (122 N•m) of loosening torque was applied to the complaint.

NOTE:  The clamp nut should not move. To verify no movement occurred, check the temporary mark across the spindle and
clamp nut. If the clamp nut moves, remove and discard the clamp nut lock screw and the clamp nut. Repeat steps 12-19 with a new
screw and nut.

20. Paint or scribe a permanent line across the end of the spindle and the clamp nut.

NOTE:  Immediately install the steering arm cover after application of sealer.

21. Clean the sealing surfaces on the geared hub and the steering arm cover. Apply anaerobic sealer to the steering arm cover and

secure the steering arm cover to the geared hub.

NOTE: Make sure the bolts and the holes are free of old Loctite.

22. Apply thread-locking compound to the bolts. Secure the steering arm cover to the geared hub with the four washers and the

bolts. Tighten the bolts to 65 lb-ft. (88 N•m).

23. Clean the sealing surfaces on the geared hub and the side cover. Apply anaerobic sealer to the side cover and install on the

geared hub (Figure  9-90).

Figure 9-90:   Geared Hub Side Cover Removal

NOTE: Make sure the bolts and the holes are free of old Loctite.

24. Apply thread-locking compound to the bolts. Secure the side cover to the geared hub with the eight washers and the bolts.

Tighten the bolts to 8-13 lb-ft. (11-18 N•m).

25. Install the geared hub.

GEARED HUB

SIDE COVER

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 Axles, Suspension and Frame  9-55

Geared Hub Spindle Seal Replacement

Removal

1.

Remove the wheel. 

2.

Remove the drain plug from the geared hub and drain the geared hub oil. Install the drain plug in the geared hub. Tighten the
drain plug to 8-13 lb-ft. (11-18 N•m) (Figure  9-91).

Figure 9-91:   Geared Hub Drain plug Removal

3.

Remove the four bolts, washers and the steering arm cover from the geared hub (Figure  9-92).

Figure 9-92:   Geared Hub Steering Arm Cover Removal

4.

Remove the clamp nut lock screw from the clamp nut (Figure  9-93).

GEARED HUB

DRAINPLUG

STEERING ARM COVER

GEARED HUB

9-56 Axles, Suspension and Frame

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Figure 9-93:   Clamp Nut Removal

5.

Using the clamp nut socket J–42545, remove the clamp nut and the keyed washer from the spindle.

6.

Remove the spindle, bearing spacer, inner bearing and the outer bearing spacer from the geared hub.

7.

Remove the spindle seal from the geared hub. Discard the spindle seal (Figure  9-94).

Figure 9-94:   Spindle Seal Removal 

Cleaning and Inspection 

1.

Inspect the spindle for rough or corroded sealing surface. Replace if damaged (Figure  9-93).

2.

Inspect the bearings for damage. Replace if damaged.

Installation

1.

Place the new output seal on the installer DT-47846 and drive the seal in until the seal bottoms out in the recess of the geared
hub (Figure  9-94).

2.

Coat the seal with lubricating oil.

3.

Install the outer bearing spacer and the spindle in the geared hub (Figure  9-93).

4.

Install the bearing spacer, inner bearing and the keyed washer on the spindle.

NOTE:  After the clamp nut lock screw is installed into the clamp nut, the clamp nut must be completely installed on the spindle
within a ten minute limit.

GEARED HUB

OUTER BEARING

SPINDLE

BEARING

INNER

KEYED

CLAMP NUT

CLAMP NUT 

CLAMP NUT

 LOCK SCREW

SOCKET

WASHER  BEARING

 SPACER

 SPACER

J-42545

DRIVER HANDLE

SPINDLE SEAL

GEARED HUB

 INSTALLER

J–8092

DT-47846

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 Axles, Suspension and Frame  9-57

5.

Tighten the clamp nut lock screw three to five turns into the clamp nut.

CAUTION:  Ensure the clamp nut is installed on the spindle with the boss (protruding side) facing inward toward the bearing and
the large chamfer side with the engraved part number facing away from the bearing.

6.

Apply a thin coat of grease to the boss (protruding side) of the clamp nut and install the clamp nut on the spindle.

7.

If an excessive amount of torque (18-26 lb-in. (2-3 N•m)) is required to tighten the clamp nut lock screw to remove the clamp
nut wobble, remove the clamp nut lock screw. Ensure the threads of the clamp nut are clean and free of Loctite. Replace the
screw with a new one or remove all the previously applied Loctite from the threads of the old screw and apply fresh Loctite
272 to the old screw threads prior to reinstallation. Use a hex socket and a torque wrench to tighten and check the screw
torque.

8.

Tighten the clamp nut lock screw until all the clamp nut wobble is removed but clamp nut can still be rotated by hand.

9.

Using the clamp nut socket J–42545, tighten the clamp nut to 40 lb-ft. (54 N•m) (Figure  9-95). Rotate the spindle five
revolutions both clockwise and counterclockwise to seat bearings.

10. Loosen and retighten the clamp nut to 25 lb-ft. (34 N•m).

NOTE: Ensure the clamp nut does not move while the clamp nut lock screw is being tightened.

11. Tighten the clamp nut lock screw to 90 lb-in. (10 N•m) with pre set torque wrench J-42546.

12. Mark a temporary line across the end of the spindle and the clamp nut. Then, using a feeler gauge, ensure a gap exists between

the clamp nut gap surfaces. If no gap exists, remove and discard the clamp nut lock screw and the clamp nut. Acquire a new
screw and nut and repeat steps 5-12.

13. Apply 90 lb-ft. (122 N•m) of loosening torque to the clamp nut with pre set torque wrench J-42547. The clamp nut should not

move. To verify no movement occurred, check the temporary mark across the spindle and the clamp nut. If the clamp nut
moved, remove and discard the clamp nut lock screw and the clamp nut. Repeat steps 5-13 with a new screw and nut.

Figure 9-95:   clamp nut Installation

14. Paint or scribe a permanent line across the end of the spindle and the clamp nut.

15. Clean the sealing surfaces on the geared hub and the steering arm cover. Apply Loctite 518 sealant to the steering arm cover

and install on the geared hub.

16. Apply thread-locking compound to the bolt threads and install the steering arm cover on the geared hub with the four washers

and the bolts. Tighten the bolts to 65 lb-ft. (88 N•m).

17. Remove the fill plug and the washer from the geared hub (Figure  9-96).

CLAMP NUT

CLAMP NUT 

KEYED WASHER

GEARED HUB

STEERING ARM 

CLAMP

COVER

LOCK SCREW

 SOCKET

J-42545

GAP

 NUT