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be disconnected and the lever arm be rotated to a vertical down position. This will exhaust air from
the bags, allowing load to be carried on internal rubber stops within the bags. This procedure is
intended for temporary operation only. See Figure 1.
Figure 1 - AIR SPRING LEVELING VALVE
Air spring suspensions are equipped with an air brake protection valve. Check and clean air filter
periodically. This valve and filter are located on the air reservoir that supplies the air for the air
suspension. Additional filters are located in the input and output ports of the height control valves.
Check periodically. For more information on height control valves click on the link below.
Hendrickson height control valves
1.1.2.1
LIFT AXLE OPERATION
Caution must be exercised when using lift axles. Frame damage can result, as well as
bending axles, should the liftable axle be raised under loaded conditions which will
transfer additional weight to the axles remaining on the ground.
1.1.2.2
DUMP VALVE OPERATION
If specified by the customer, a trailer may be equipped with a dump valve. An air ride end
dump is equipped with an automatic dump valve that is activated when the trailer starts
the dump cycle. This allows the air to be exhausted from the bags, increasing stability by
eliminating the possibility of air bag failure. When using a trailer equipped with a dump
valve you should do the following:
IT IS IMPERATIVE THAT ALL AIR BE EXHAUSTED FROM AN AIR
RIDE SUSPENSION BEFORE THE DUMP CYCLE IS INITIATED.
TIPOVER CAN RESULT DUE TO INSTABILITY!
LINK TO VENDOR FILE