Hummer H1 (2006+). Manual - part 268

9-50 Axles, Suspension and Frame

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Figure 9-83:   Input Seal Removal

Inspection

NOTE:  Clean all the components, examine for wear or damage and replace if necessary. The drive and the driven gears must be
replaced as matched set (Figure  9-84).

1.

Inspect the splines and the gear teeth on the drive gear and the driven gear for damage.

2.

Inspect the spindle for damage and rough or corroded sealing surface.

3.

Inspect all the bearings and the bearing races for damage.

4.

Inspect the steering arm cover for damage.

5.

Inspect the geared hub and all the threaded holes for damage. Repair any damaged holes using thread repair inserts.

Figure 9-84:   Geared Hub Component Appearance

DRIVE GEAR RETAINER

INPUT SEAL

DRIVE GEAR

DRIVEN

BEARING

SPINDLE

SEALING

STEERING ARM COVER

GEARED HUB

 SURFACE

BEARING RACE

 GEAR

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 Axles, Suspension and Frame  9-51

Assembly

1.

Place the new output seal on the installer DT-47846 with the seam in the perimeter facing the geared hub and drive the seal in
until the seal bottoms out on the geared hub surface. The seal will be bottomed out in the recess of the geared hub. (Figure 
 9-85).

Figure 9-85:    Spindle Seal Installation

2.

Using driver handle J–8092 and input seal installer DT-47845, install the input seal in the drive gear retainer. Place the new
primary seal on the installer with the open side of the seal facing toward the drive gear retainer. Drive the seal in until the
installer bottoms against the drive gear retainer. The seal will be recessed in the drive gear retainer approximately 0.200". This
dimension is critical and must be achieved using the special tool (Figure  9-86).

Figure 9-86:   Input Seal Installation

3.

Install the retaining washer in the shallow end of the drive gear (Figure  9-87).

DRIVER

SPINDLE

SPINDLE SEAL

GEARED HUB

SEAL INSTALLER

HANDLE

DT-47846

J–8092

DRIVER HANDLE

INPUT SEAL

DRIVE GEAR 

RETAINER

 INSTALLER

J–8092

DT-47845

9-52 Axles, Suspension and Frame

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Figure 9-87:   Retaining Washer Location

4.

Install the drive gear and the inboard bearing cup in the geared hub.

5.

Apply thread-locking compound on the bolts. Secure the shim gasket and the drive gear retainer to the geared hub with the
four washers and the bolts. Tighten the bolts to 25-35 lb-ft. (40-48 N•m).

6.

Mount the dial indicator on the geared hub and index the indicator to register on the end of the drive gear (Figure  9-88).

Figure 9-88:   Dial Indicator Positioning

7.

Move the drive gear up and down to read the end play. End play should be 0.001-0.006 in. (0.03-0.15 mm). If end play is
incorrect, add or subtract the shim gaskets and recheck the end play.

8.

Install the driven gear and the bearing spacer in the geared hub (Figure  9-89).

DRIVE GEAR RETAINER

SHIM GASKET

INBOARD

DRIVE GEAR

RETAINING

GEARED HUB

BEARING CUP

 WASHER

DIAL INDICATOR

GEARED HUB

DRIVE GEAR

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 Axles, Suspension and Frame  9-53

Figure 9-89:   Geared Hub Driven Gear Installation

9.

Install the outer bearing spacer on the spindle.

10. Lower the geared hub onto the spindle and align the splines on the driven gear with the splines on the spindle. Ensure the outer

spindle bearing seats in the bearing cup.

11. Install the inner bearing and 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.

12. 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 boss (protruding side) facing inward toward the bearing and the
large chamfer side with engraved part number facing away from the bearing.

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

NOTE:  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 clamp
nut wobble, remove the 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 hexagon head socket with a calibrated torque wrench J-42546 to tighten and check the torque of the
screw.

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

STEERING ARM COVER

CLAMP NUT

LOCK SCREW

KEYED

INNER

BEARING

GEARED HUB

OUTER

 BEARING

 SPACER

SPINDLE

DRIVEN GEAR

 SPACER

 BEARING

 WASHER

CLAMP NUT SOCKET

OUTER SPINDLE

BEARING

GAP

CLAMP NUT