17730-241 27 Alignment & Adjustments
AR2
™
Alignment & Adjustments
The AR2 suspension is equipped with dual height control valves located on the rear of the trailing
arm and mounted on the frame or cross member gusset. Refer to the Plumbing Diagram section
of this publication.
When inspecting or setting ride height on a vehicle, it is recommended to have a load on the vehi-
cle. Loading the vehicle to its normal operating condition increases ride height setting accuracy.
1. Drive the vehicle onto a level surface.
2. Relax the suspension by slowly moving the vehicle back and forth several times in a straight
line without using the brakes. This will slacken or loosen the suspension as the vehicle is posi-
tioned. End with all wheels positioned straight ahead. Roll to a stop without the brakes being
applied. set the parking brake.
3. Chock front wheels of the vehicle.
4. When checking or adjusting ride height, verify and maintain the vehicle’s air system at full
operating pressure.
It is very important that the height
control valves be cycled com-
pletely before and after any ride
height adjustments. The cycling of
the height control valve will help to
make the adjustment more accurate.
PRIOR TO AND DURING DEFLATION
AND INFLATION OF THE AIR
SUSPENSION SYSTEM, ENSURE THAT
ALL PERSONNEL AND EQUIPMENT
ARE CLEAR FROM UNDER THE
VEHICLE AND AROUND THE SERVICE
AREA, FAILURE TO DO SO CAN CAUSE
SERIOUS PERSONAL INJURY, DEATH,
OR PROPERTY DAMAGE.
5. See additional Air Spring
Cautions and Warnings in the
Important Safety Notice section
of this publication prior to deflating or inflating the air system.
SOME VEHICLE APPLICATIONS, SUCH AS VEHICLES EQUIPPED WITH OUTRIGGERS, RETAIN SOME AIR
PRESSURE IN THE AIR SPRINGS AT ALL TIMES. PRIOR TO PERFORMING ANY MAINTENANCE, SERVICE,
OR REPAIR OF THE SUSPENSION, VERIFY EACH AIR SPRING IS COMPLETELY DEFLATED. FAILURE TO DO
SO COULD RESULT SERIOUS PROPERTY DAMAGE AND / OR SEVERE PERSONAL INJURY.
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