Rear Suspension; Shock Absorber--Except Firebird - Pontiac Grand Prix Service Manual

CONTENTS OF THIS SECTION
SUBJECT PAGE SUBJECT PAGE
General Information.
. . . . . . . . . . . . . .
Adjustment Procedures (Auto Level Control)
Major Service.
. . . . . . . . . . . . . . . . . -
Shock Absorber
-
Except Firebird
(Includes Super Lift)
. . . . . . . . . . . .
Shock Absorber
-
Firebird.
. . . . . . . . .
Spring and Shock Absorber Anchor Plate
. . . .
o r Spring Cushion Pads
-
Firebird
Rear Spring
-
Except Firebird
. . . . . . .
Leaf Spring and Spring Eye Bushing
-
Firebird
. . . . . . . . . . . . . . . . . . .
Main Leaf of Leaf Spring
-
Firebird
.
,
. .
Upper Control Arm
-
Except Firebird
. . .
Upper Control Arm Bushing
-
Except
Firebird
. . . . . . . . . . . . . . . . . . .
Lower Control Arm
-
Except Firebird
. . .
Pontiac and G ~ a n d P r i x Automatic Level
Control System
. . . . . . . . . . . . . . . .
Precautions
. . . . . . . . . . . . . . . . . .
Tubing
. . . . . . . . . . . . . . . . . . . . .
Compressor, Reservoir and Regulator
. . . . . . . .
Valve Assembly
-
Remove.
Disassembly of Compressor into Major
Components
. . . . . . . . . . . . . . . . .
Disassembly of Piston
-
Diaphragm
Assembly.
. . . . . . . . . . . . . . . . . .
GENERAL INFORMATION
Shock absorbers do not require lubrication and in case
of leaks or malfunction, they should be replaced.
On the Automatic Level Control System an air filter
located on the compressor should be inspected periodi-
cally to see if it has become plugged. The compressor
does not require lubrication as the unit is designed to
operate dry.
ADJUSTMENT PROCEDURES
Automatic Level Control on car trim adjustment
should be performed with a full fuel tank (or an
equivalent load at the rate of six pounds per gallon of
gasoline). The proper adjustment procedure is listed
below:
1. Fill compressor through service valve with air at
available line pressure.
2. Raise the car on twin post or drive-on hoist.
Disassembly .of F i r s t Stage Housing and
Valve Mechanism
. . . . . . . . . . . . . .
Disassembly of Second Stage Housing.
. . .
~ s s e m b l y of Second Stage Housing
. . . . .
Assembly of F i r s t Stage Housing and
Valve Mechanism
. . . . . . . . . . . . . .
Assembly of Piston
-
Diaphragm Assembly
Assembly of Major Components
. . . . . . .
Compressor, Reservoir and Regulator
. . . . . . . . .
Valve Assembly
-
Install.
Trouble Diagnosis T e s t s
. . . . . . . . . . . .
Quick Check of Automatic Level Control
System.
. . . . . . . . . . . . . . . . . . .
Automatic Level Control Test Gage.
. . . :
Compressor Output T e s t
-
On C a r
. . . . .
P r e s s u r e Regulator T e s t .
. . . . . . . . . .
Height Control Valve Test
-
On C a r
. . . .
Time Delay Check
. . . . . . . . . . . . . .
Compressor, Reservoir and Regulator Leak
T e s t . . . . . . . . . . . . . . .
. . . . . .
Height Control Valve Tbst
-
Off C a r
. . . .
Lines and Fittings
-
Leak T e s t .
. . . . . . .
Superlift
-
Leak T e s t
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
Special Tools
Torque Specifications
. . . . . . . . . . . . . .
3. Disconnect the link from the height control valve
lever.
4. Move the height control valve lever downward until
air stops escaping from the exhaust port on the height
control valve. The Superlifts will now automatically
hold 8-15 psi.
6. Let the lever go to its neutral position and loosen
the lever adjustment nut.
7. Connect the link to the height control valve lever
and tighten the lever adjustment nut.
NOTE: Do not move control valve lever and over travel
body while tightening nut.
MAJOR SERVICE
SHOCK ABSORBER--EXCEPT FIREBIRD
NOTE: To test Super18 shock absorber for air leaks
remove shock absorber as outlined below and inflate to