AIR SUSPENSION HEIGHT/AIR PRESSURE STARTING AND OPERATING THE VEHICLE
– 132 – Y53-6033
Regional Haul (R05/10)
2. Loosen the fasteners mounting a height control valve
to its bracket.
WARNING! Be extremely careful when deflat-
ing 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 per-
sons 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.
Typical Height Control Valve (Top View)
ALIGNMENT PIN OR DOWEL CONTROL ARM LINK BOLT
FORWARD
FROM DUMP VALVE SWITCH
02941A
