Hummer H1 (2006+). Manual - part 281

9-102 Axles, Suspension and Frame

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Figure 9-153:   Axle Support/Brake Adapter and Output Flange Replacement

Installation

1.

Apply Loctite 272 (or equivalent) thread-locking compound to the axle assembly tapped holes. Secure the axle support/brake 
adapter to the axle assembly with the four bolts. Tighten the bolts to 125-150 lb-ft. (169-203 N•m).

2.

Install the lower support bolt and torque to 125-150 lb-ft. (169-203 N•m).

3.

Install the output flange on the output shaft with the seal washer and the locknut. Tighten the locknut to 165-195 lb-ft. (224-
264 N•m).

4.

Install the brake caliper and the rotor.

Front Suspension Front Crossmember Replacement

Removal

1.

Drain the cooling system (Refer to section 4).

1.

Remove the front lower control arms (Refer to section 9).

2.

Remove the lower radiator hose (Refer to section 4).

3.

Remove the two bolts, locknuts and the washers from the front crossmember to the front radiator mount and the brake line
support bracket (Figure  9-154). 

WARNING:  Failure to lower and latch the hood could result in personal injury and body damage.

4.

Mark the lower hood support bracket position then lower and latch the hood.

5.

Remove the four bolts, washers and the locknuts holding lower hood support bracket to the front crossmember (Figure  9-154).

NOTE:  Note the direction of the bolts for installation.

6.

Remove the four locknuts, washers, bolts and the washers securing the two splash shield brackets to the frame rails (Figure
 9-155).

VENT LINE

MOUNTING

RUBBER

OUTPUT

AXLE ASSEMBLY

DRAINPLUG

 FLANGE

 WASHER

 BRACKET

UPPER

LOCKNUT

TAPPED

 HOLES

AXLE SUPPORT/

BRAKE ADAPTER

BRACKET

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 Axles, Suspension and Frame  9-103

Figure 9-154:   Support Brackets

WARNING:  To avoid personal injury, support the crossmember during removal.

7.

Remove the four bolts, washers and the two locknuts securing the crossmember mounting brackets to the frame rails.

8.

Remove the six locknuts, washers, bolts and the washers securing the front crossmember to the left and the right front
crossmember mounting brackets. 

9.

Slide the crossmember down and out from under the vehicle. 

Figure 9-155:   Splash Shield Mounting

Installation

1.

Position the left and the right crossmember mounting brackets on the crossmember (Figure  9-156).

2.

Install the crossmember on the frame rails with the four washers, bolts, washers and the locknuts. Do not tighten the locknuts.

3.

Install the six washers, bolts, washers and the locknuts securing the front crossmember to the left and the right mounting
brackets. Tighten the bolts to 90 lb-ft. (122 N•m).

4.

Tighten the larger rear mounting bracket-to-frame rail locknuts to 261 lb-ft. (354 N•m) and tighten the smaller front locknuts
to 90 lb-ft. (122 N•m).

RADIATOR

MOUNTING BRACKET

BRAKE LINE

SUPPORT BRACKET

HOOD SUPPORT

BRACKET

FRONT

CROSSMEMBER

FRAME RAIL

SPLASH SHIELD BRACKET

9-104 Axles, Suspension and Frame

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5.

Install the four bolts, washers and the locknuts holding lower hood support bracket to the front crossmember and adjust to the
bracket to it’s original position. 

6.

Install the four washers, bolts, washers, locknuts and the two splash shield brackets on the frame rails. Tighten the locknuts to
90 lb-ft. (122 N•m) (Figure  9-155).

7.

Install the bolts, locknuts and the washers to the front crossmember from the radiator front mounting bracket.

8.

Install the lower radiator hose.

9.

Install the front lower control arms.

10. Fill, bleed and leak test the cooling system.

Figure 9-156:   Front Suspension Front Crossmember Replacement

FRAME RAIL

CROSSMEMBER

FRONT

MOUNTING BRACKET

CROSSMEMBER

FRONT

CROSSMEMBER

LOWER HOOD

SUPPORT BRACKET

CROSSMEMBER

MOUNTING BRACKET

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 Axles, Suspension and Frame  9-105

Front Suspension Rear Crossmember Replacement

Removal

1.

Remove the geared fan drive (Refer to section 4).

2.

Remove the right front upper control arm (Refer to section 9).

3.

Remove the lower radiator tube.

4.

Remove the right front caliper-to-tee brake line.

5.

Remove the lower control arms.

6.

Remove the three bolts, lock washers, washers and pull the steering gear away from the left frame rail (Refer to section 8).

7.

Remove the three bolts and the clamps from the vent line bracket and the crossmember (Figure  9-157).

WARNING:  To avoid personal injury, support the crossmember during removal.

NOTE: Note the direction of the bolts for installation.

8.

Remove the four locknuts, washers, bolts, washers and the vent line bracket securing the rear crossmember to the right frame
rail.

9.

Remove the three locknuts, washers, bolts, washers and the vent line bracket securing the rear crossmember to the left frame
rail.

10. Remove the three locknuts, washers, bolts, washers securing the rear crossmember to the left frame rail.

11. Remove the six locknuts, washers, bolts and the washers securing the rear crossmember to the left and the right rear

crossmember mounting brackets. 

12. Slide the rear crossmember and the mounting brackets down and out from under the vehicle.

13. Remove the mounting brackets from the rear crossmember.

Installation

1.

Install the left and the right rear crossmember mounting brackets on the rear crossmember (Figure  9-157).

2.

Install the rear crossmember and the mounting brackets on the frame rails.

3.

Apply thread-locking compound to the hole and secure the crossmember mounting bracket to the left frame rail with the
washer and the bolt. Tighten the bolt to 65-78 lb-ft. (88-106 N•m).

4.

Secure the crossmember mounting bracket to the left frame rail with the vent line bracket, three washers, bolts, washers and
the locknuts. Do not tighten the bolts.

5.

Secure the crossmember mounting bracket to the right frame rail with the vent line bracket, four washers, bolts, washers and
the locknuts. Do not tighten the bolts.

6.

Install the six washers, bolts, washers and the locknuts securing the rear crossmember to the left and the right mounting
brackets. Tighten the bolts to 90 lb-ft. (122 N•m).

7.

Tighten the four bolts on the mounting bracket and the left frame rail to 90 lb-ft. (122 N•m).

8.

Tighten the four bolts on the mounting bracket and the right frame rail to 90 lb-ft. (122 N•m).

9.

Secure the vent line to the rear crossmember and the two vent line brackets with the three clamps and the bolts.

10. Secure the steering gear to the left frame rail with the three washers, lock washers and the bolts (Refer to section 8)

11. Install the axle.

12. Install the lower control arms.