Pontiac FIREBIRD 1972 Service Manual page 287

SECTION 4
REAR SUSPENSION
The following caution applies to one or more steps in the assembly proce-
dure of components in this portion of the manual as indicated at appropri-
ate locations by the terminology "See Caution on page 1 of this Section".
CAUT I0 N: THIS FASTENER IS A N IMPORTANT A TTA CHING
PART IN THAT IT COULD AFFECT THE PERFORMANCE OF
VITAL COMPONENTS AND SYSTEMS, AND/OR COULD RE-
SULT IN MAJOR REPAIR EXPENSE. IT MUST BE REPLACED
WITH ONE OF THE SAME PART NUMBER OR WITH A N
EQUIVALENT PART IF REPLACEMENT BECOMES NECES-
SAR Y. DO NOT USE A REPLACEMENTPAR T OFLESSER QUAL-
ITY OR SUBSTITUTE DESIGN. TORQUE VALUES MUST BE
USED AS SPECIFIED DURING REASSEMBLY TO ASSURE
PROPER RETENTION OF THIS PAR i ?
CONTENTS OF THIS SECTION
Trouble Diagnosis and Testing
Superlift System Leaks Air Pressure
....................
4-2
Superlifts Noisy When Car is Driven
..................
4-2
Automatic Level Control Will Not Raise
with Car Loaded
...............................................
4-2
Automatic Level Control Raises Car
to Proper Height But Leaks Down
..................
4-3
Automatic Level Control Only Partially
Raises Car When Loaded
..................................
4-3
Automatic Level Control Raises Car Too
High When Car is Unloaded
............................
4-3
Automatic Level Control Raises Car
When Loaded But Leaks Down Only
When Car is Driven
..........................................
4-3
Quick Check of Automatic Level Control
System
...............................................................
4-4
Automatic Level Control Test Gage
....................
4-4
Compressor Output Test
-
On Car
......................
4-4
Pressure Regulator Test
........................................
4-5
Height Control Valve Test
-
On Car
....................
4-3
Time Delay Check
................................................
4-5
Compressor, Reservoir and Regulator Leak
Test
...................................................................
4-6
Height Control Valve Test
-
Off Car
..................
4-6
Lines and Fittings
-
Leak Test
..............................
4-7
Superlift
-
Leak Test
............................................
4-7
General Description
..................................................
4-7
Shock Absorbers
Standard and Heavy Duty
................................
4-8
Superlift
..............................................................
4-8
Automatic Level Control
B & G Series
......................................................
4-10
General Information
................................................
4- 13
Adjustment Procedures (Auto. Level Control)
......
Major Service
..........................................................
Shock Absorber (Includes Superlift)
..................
Spring
Coil
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Leaf
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. . . .
.
. . . . . . . . . . . . . . . . . . . . .
Spring Dampener
........................................
Main Leaf
....................................................
Tip Inserts
....................................................
Spring and Shock Absorber Anchor
Plate or Spring Cushion Pads
..................
Front Bushing
..............................................
Shackles, Pins, Bushings and Sleeves
..........
Stabilizer Shaft
GTO & G T
......................................................
Formula, Trans Am & X Series
....................
Lower Support Bushing
..............................
Insulator and/or Bracket
............................
Support
..... .. . ..
. .
.
.
..
.
. .. . . . . .. . .. . . . . .. . . .. . . . . . . .. . .. . .. . .
.
Upper Control Arm
............................................
Upper Control Arm Bushing
..............................
Lower Control Arm
............................................
Lower Control Arm Bushing
..............................
Automatic Level Control System
B & G Series
......................................................
Precautions
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Tubing
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Compressor, Reservoir and Regulator
.
Valve Assembly
Remove
. . . . . . . . . . . . . . .
.
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Install
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...
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.
.
Disassemble
Compressor into Major
Components
......................................
4-32