Pontiac FIREBIRD 1972 Service Manual page 299

REAR SUSPENSION 4-13
I
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
CAUTION: Use care not to crush exhaust sys-
tem 'kick-under v pipe on B Series station wag-
ons when using an axle engaging hoist.
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.
Automatic Level Control on car trim adjustment should
5. Let the lever go to its neutral position and loosen the
be performed with a full fuel tank (or an equivalent load
lever adjustment nut.
at the rate of six pounds per gallon o f gasoline). The
proper adjustment procedure is listed be10 w:
6 . Connect the link to the height control valve lever and
tighten the lever adjustment nut.
1. Fill compressor through service valve with air at
available line pressure.
NOTE: Do not move control valve lever and
2. Raise the car on two-post or drive-on hoist. over travel body while tightening nut.
MAJOR SERVICE
S H O C K ABSORBER
NOTE: To test Superlift shock absorber for air
leaks remove shock absorber as outlined below
and inflate to 80-1 10 psi utilizing fill valve fram
J 22695 package, submerge in water and ob-
serve for leaks. See Precautions under A UTO-
MA TIC LEVEL CONTROL SYSTEM
-
B
&
G SERIES for further superlift information.
REMOVE
1. Raise car at axle housing.
CAUTION: Use care not to crush exhaust sys-
tem '%kick-under"p~pe on B Series station wag-
ons when using an axle engaging hoist.
2. Remove wheel and tire assembly on B Series station
wagon.
3. a. Remove nut, retainer and grommet or nut and lock
washer which attach lower end of shock absorber to
its mounting (Fig. 4-17; Fig. 4-18; Fig. 4-19, View A;
or Fig. 4-20, View D).
CAUTION: Shock absorber stud must not turn
while loosening nut. I f necessary, use pliers or
wrench to hold bottom of stud while removing
nut.
;
SHOCK ABSORBER ASM.
INSTALL I N LOWER
HOLE I N BRACKET,
ASM.
Fig. 4-17 Installation of Shock Absorber (Coil Spring
Suspension)