Regional Haul Model Operator's Manual - Peterbilt Motors Company

AIR SUSPENSION HEIGHT/AIR PRESSURE
STARTING AND OPERATING THE VEHICLE
2. Loosen the fasteners mounting a height control valve
to its bracket.
WARNING! Be extremely careful when deflating
the air springs. The rear of the vehicle will
drop about 3-1/2 inches (88 mm) when the air
springs are deflated. Make sure that no persons
that could be killed or injured or any
objects that could be damaged are under the
vehicle.
To minimize the risk of damage death or
injury, do not use the dump valve to deflate
the air springs. Operate the height control
valve(s) manually to ensure positive control
of air spring deflation.
To minimize risk of death or injury, keep
away from air springs as they are being
inflated.
ALIGNMENT PIN OR DOWEL CONTROL ARM LINK BOLT
FROM DUMP VALVE SWITCH
FORWARD
02941A
Typical Height Control Valve (Top View)
– 132 – Y53-6033 Regional Haul (R05/10)