Hummer H1 (2006+). Manual — part 273

9-70 Axles, Suspension and Frame

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Figure 9-112: Bar Link Replacement

Installation

WARNING: The lower control arm must be supported during the removal and the installation. Failure to support
the lower control arm may cause personal injury or damage to the equipment.

NOTE: On the lower control arms, the bolt heads are toward the front of the vehicle.

1.

Install the lower control arm on the brackets with the two bolts, washers and the locknuts. Do not tighten the locknuts (Figure
9-113).

Figure 9-113: Lower Control Arm Replacement

2.

Install the coil spring on the lower control arm ensuring the end of the coil spring fits in the spring pocket of the lower control
arm.

3.

Install the lower ball joint on the lower control arm, ensuring the ball joint is placed below the lower control arm.

4.

Secure the lower ball joint to the lower control arm with the four bolts, locknuts and the eight washers. Tighten the locknuts to
65 lb-ft. (80 N•m).

BAR LINK

LOWER CONTROL ARM

BRACKET

COIL

SPRING

LOWER

LOWER BALL JOINT

GEARED HUB

SPRING

POCKET

CONTROL

ARM

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Axles, Suspension and Frame 9-71

5.

Install the lower ball joint on the geared hub with the slotted nut. Tighten the slotted nut to 73 lb-ft. (99 N•m) and install the
cotter pin in the slotted nut.

6.

Tighten the locknuts on the brackets to 260 lb-ft. (353 N•m).

7.

Apply thread-locking compound to the threads of the bolt. Install the bar link on the lower control arm with the two washers
and bolt. Tighten the bolt to 70 lb-ft. (95 N•m) (Figure 9-112).

8.

Install the shock absorber.

9.

Install the wheel (Refer to section 6).

COIL SPRING

Replacement

NOTE: The procedure for removing and installing all four coil springs is basically the same. This procedure covers the left front
coil spring.

NOTE: Various load capacity springs are used in the HUMMER H1 based on the powertrain and the option packages. Refer to the
parts catalog to select the proper replacement spring for the specific application.

Removal

1.

Remove the wheel (Refer to section 6).

2.

Remove the bolt, two washers and the bar link from the lower control arm.

3.

Remove the four locknuts, washers, bolts, washers, lower ball joint and the geared hub from the lower control arm (Figure
9-114).

4.

Place the jack under the lower control arm and raise the lower control arm slightly to relieve the tension on the shock pin.

5.

Remove the locknut, shock pin, washer and the shock absorber from the spring seat and collapse shock absorber.

NOTE: It may be necessary to loosen the lower control arm bolts to allow the lower control arm to be lowered.

6.

Pull the geared hub and the lower ball joint away from the lower control arm and remove the coil spring from the lower control
arm and the shock absorber.

Installation

NOTE: Index the coil spring in the spring pocket for a slight gap 1/16 - 1/8 in. (1.59 - 3.18 mm) when the spring is in position.

1.

Install the coil spring over the shock absorber and onto the lower control arm ensuring the end of the coil spring fits in the
spring pocket of the lower control arm (Figure 9-114).

2.

Ensure that the coil spring is aligned with the spring seat flange, and raise the lower control arm.

3.

Extend the shock absorber into the spring seat and install with the washer, shock pin and the locknut. Tighten the locknut to
300 lb-ft. (407 N•m).

4.

Install the lower ball joint and the geared hub on the lower control arm ensuring the lower ball joint is placed below the lower
control arm. Secure the lower ball joint to the lower control arm with the four washers, bolts, washers and the locknuts.
Tighten the front locknuts to 37 lb-ft. (50 N•m) and the rear locknuts to 60 lb-ft. (80 N•m).

5.

Apply thread-locking compound to the threads of the bolt. Install the bar link on the lower control arm with the two washers
and the bolt. Tighten the bolt to 70 lb-ft. (95 N•m).

6.

Install the wheel (Refer to section 6).

9-72 Axles, Suspension and Frame

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Figure 9-114: Coil Spring Replacement

SHOCK ABSORBER

Replacement

NOTE: The procedure for removing and installing all shock absorbers is the same, except the rear lower shock pins must be in-
stalled with the head of the pin facing rearward. This procedure covers the left front shock absorber.

Removal

1.

Remove the two bolts, washers, lock washers, shock absorber and the bracket from the lower control arm (Figure 9-115).

2.

Remove the locknut, shock pin, washer and the shock absorber from the spring seat. Note the position of the pin for
installation.

3.

Compress and remove the shock absorber and the bracket.

NOTE: Note the alignment of the shock absorber and the bracket for installation reference.

4.

Position the shock absorber in a vise, using tool CH-47505 and a breaker bar to hold the pin in place remove the locknut, pin,
washer and the bracket from the shock absorber.

Installation

NOTE: It may be necessary to spread the spring seat to allow installation of the shock absorber.

1.

Position the shock absorber in a vise and install the bracket on the shock absorber with the washer, pin and the locknut. Using
tool CH-47505 and a breaker bar to hold the pin in place. Tighten the locknut to 300 lb-ft. (407 N•m) (Figure 9-115).

CAUTION: Do not pry or use sharp tools on the shock absorber piston rod. A damaged rod will cause shock failure.

2.

Install the shock absorber and the bracket through the lower control arm.

COIL SPRING

SHOCK PIN

SPRING SEAT

GEARED HUB

LOWER

CONTROL

ARM

BAR LINK

LOWER BALL JOINT

SHOCK ABSORBER

SPRING POCKET

LOWER CONTROL ARM

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Axles, Suspension and Frame 9-73

3.

Extend the shock absorber and secure the piston rod end of the shock absorber to the spring seat with the washer, shock pin
and the locknut. Using tool CH-47505 and a breaker bar to hold the pin in place. Tighten the locknut to 300 lb-ft. (407 N•m).

4.

Install the bracket on the lower control arm with the two washers, lock washers and the bolts. Tighten the bolts to 178 lb-ft.
(241 N•m).

Figure 9-115: Shock Absorber Replacement

RADIUS ROD

Replacement

Removal

1.

Remove the wheel.

2.

Remove the cotter pin, slotted nut and the washer securing the radius rod to the geared hub (Figure 9-116).

3.

Using puller J–24319-B or equivalent, separate the radius rod from the geared hub.

4.

Remove the locknut, washers, bolt and the radius rod from the bracket.

Installation

1.

Install the radius rod on the bracket with the washer, bolt, washer and the locknut. Tighten the locknut to 260 lb-ft. (353 N•m)
(Figure 9-116).

CAUTION: Do not loosen the slotted nut to install the cotter pin. If necessary, tighten the slotted nuts to align the holes for cotter
pin insertion.

NOTE: When the slotted nuts are tightened to prescribed torque values, the cotter pins must have a minimum of 50% engagement
with the nut slots.

2.

Install the radius rod on the geared hub with the washer and the slotted nut. Tighten the slotted nut to 70 lb-ft. (95 N•m). Install
the cotter pin in the slotted nut.

3.

Install the wheel.

SPRING SEAT

LOWER CONTROL ARM

BRACKET

SHOCK

SHOCK PIN

PIN

ABSORBER