Hummer H1 (2002+). Manual - part 148

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 Axles, Suspension, and Frame  9-53

®

05745159

SPRING SEAT REPLACEMENT

NOTE: 

Replacement of the four spring seats is basically the

same. This procedure covers the right front spring seat.

Removal 

1.

Remove coil spring.

2.

Remove four locknuts, washers, bolts, spring bracket, and
front spring seat from frame rail (Figure 9-127).

Installation 

1.

Install spring bracket and front spring seat on frame rail 
with four washers, bolts, washers, and locknuts. Tighten 
locknuts to 261 lb-ft (354 N•m) (Figure 9-127).

2.

Install coil spring.

Figure 9-127:   Front Spring Seat Replacement

REAR BUMPER OUTER MOUNTING BRACKET 
AND TIEDOWN BRACKET REPLACEMENT

Removal 

1.

Remove rear body mount (Section 10).

2.

Remove two locknuts, washers, bolts, and washers
securing tiedown bracket and outer mounting bracket to
mounting bracket and rear bumper (Figure 9-128).

3.

Remove two bolts and washers securing outer mounting
bracket to mounting bracket.

4.

Remove four locknuts, washers, bolts, washers, outer
mounting bracket, and spacer from frame rail and inner
mounting bracket. 

Installation 

NOTE: 

Ensure spacer on inner side of frame rail is in position

before installing spacer and outer mounting bracket.

1.

Install spacer and outer mounting bracket on frame rail and 
inner mounting bracket with four washers, bolts, washers, 
and locknuts. Do not tighten locknuts (Figure 9-128).

2.

Secure outer mounting bracket to mounting bracket with
two washers and bolts. Do not tighten bolts.

3.

Install tiedown bracket on rear bumper and secure tiedown
bracket and outer mounting bracket to mounting bracket
and rear bumper with two washers, bolts, washers, and
locknuts.

4.

Tighten all locknuts and bolts to 90 lb-ft (122 N•m).

5.

Install rear body mount (Section 10).

Figure 9-128:   Rear Bumper Mounting Bracket

Replacement

SPRING BRACKET

FRAME RAIL

FRONT SPRING SEAT

MOUNTING

BRACKET

FRAME

RAIL

TIEDOWN BRACKET

REAR

SPACER

BUMPER

OUTER MOUNTING

BRACKET 

9-54

Axles, Suspension, and Frame

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®

LEFT ENGINE MOUNT BRACKET REPLACEMENT

Removal 

1.

Remove two bolts securing brake line and oil line clamps 
to engine mount bracket (Figure 9-129).

2.

Remove two locknuts and washers securing engine mount
bracket to insulator.

CAUTION: To avoid engine oil pan damage, wood block must
completely cover bottom of oil pan.

3.

Support engine under engine oil pan with wood block and
jack stand (Figure 9-130).

4.

Remove four locknuts, washers, bolts, washers, and
engine mount bracket from frame rail  (Figure 9-129).

Figure 9-129:   Left Engine Mount Bracket 

Replacement

Installation 

1.

Install engine mount bracket on frame rail with four wash-
ers, bolts, washers, and locknuts. Tighten locknuts to 90 
lb-ft (122 N•m)  (Figure 9-129).

2.

Remove wood block and jack stand from under engine oil
pan  (Figure 9-130).

3.

Secure engine mount bracket to insulator with two
washers and locknuts. Tighten locknuts to 90 lb-ft (122
N•m)  (Figure 9-129).

4.

Secure brake line and oil line clamps to engine mount
bracket with two bolts.

Figure 9-130:   Supporting Engine

BRAKE

OIL LINE CLAMP

INSULATOR

ENGINE MOUNT

BRACKET

FRAME RAIL

LINE CLAMP

ENGINE

WOOD BLOCK

JACK STAND

OIL PAN

________________________________________

 Axles, Suspension, and Frame  9-55

®

05745159

RIGHT ENGINE MOUNT BRACKET 
REPLACEMENT

Removal 

1.

Remove right engine mount and insulator (Section 2).

2.

Remove two locknuts, washers, bolts, and washers
securing support bracket to engine mount bracket
(Figure 9-131).

3.

Remove bolt securing vent tube clamp to engine mount
bracket.

4.

Remove three locknuts, washers, bolts, washers, support
bracket, and engine mount bracket from frame rail.

Figure 9-131:   Right Engine Mount Bracket 

Replacement

Installation 

1.

Install support bracket and engine mount bracket on frame 
rail with three washers, bolts, washers, and locknuts 
(Figure 9-131).

2.

Install support bracket on engine mount bracket with two
washers, bolts, washers, and locknuts. Tighten locknuts to
90 lb-ft (122 N•m).

3.

Install vent tube clamp on engine mount bracket with bolt.

4.

Install right engine mount and insulator (Section 2).

RIGHT FRONT BODY MOUNT BRACKET 
REPLACEMENT

Removal 

1.

Remove right front body mount.

2.

Remove three locknuts, washers, bolts, washers, and right
front body mount bracket from frame rail (Figure 9-132).

Installation 

1.

Install right front body mount bracket on frame rail with 
three washers, bolts, washers, and locknuts. Tighten lock-
nuts to 90 lb-ft (122 N•m) (Figure 9-132).

2.

Install right front body mount (Section 10).

Figure 9-132:   Right Front Body Mount Bracket 

Replacement

VENT TUBE

CLAMP

FRAME RAIL

SUPPORT

ENGINE MOUNT

BRACKET

BRACKET

FRAME

RAIL

LOWER

CUSHION

UPPER

CUSHION

SLEEVE

SPACER

BODY

9-56

Axles, Suspension, and Frame

_________________________________________

®

TRANSMISSION MOUNT CROSSMEMBER 
REPLACEMENT

Removal 

CAUTION: To prevent equipment damage during removal and
installation of transmission mount crossmember, transmission
must be supported.

1.

Place support under transmission and remove two lock-
nuts, washers, bolts, and washers securing transmission 
mount crossmember to two transmission support brackets 
(Figure 9-133).

2.

Remove two locknuts, washers, and transmission mount
crossmember from transmission mount.

Installation 

1.

Install transmission mount crossmember on two transmis-
sion support brackets with two washers, bolts, washers, 
and locknuts. Tighten locknuts to 90 lb-ft (122 N•m) 
(Figure 9-133).

2.

Install crossmember on transmission mount with two
washers and locknuts. Tighten locknuts to 28 lb-ft
(38 N•m).

3.

Remove support.

Figure 9-133:   Transmission Mount Crossmember

Replacement

TRANSMISSION CROSSMEMBER SUPPORT 
BRACKET REPLACEMENT

Removal 

1.

Remove transmission mount crossmember.

2.

Remove two locknuts and washers securing transmission
crossmember support bracket to frame rail (Figure 9-134).

Installation 

1.

Install transmission crossmember support bracket on two 
bolts and frame rail with two washers and locknuts. 
Tighten locknuts to 90 lb-ft (122 N•m) (Figure 9-134).

2.

Install transmission mount crossmember.

Figure 9-134:    Transmission Crossmember 

Support Bracket Replacement

TRANSMISSION

SUPPORT

BRACKET

TRANSMISSION MOUNT

TRANSMISSION MOUNT

CROSSMEMBER

FRAME RAIL

TRANSMISSION
CROSSMEMBER

SUPPORT BRACKET