TROUBLE SHOOTING GUIDE
DUMP VALVE PROBLEMS
CAUTION: Due to the geometry of all trailing
beam air ride suspensions, the trailer will move
forward when the air is exhausted.
If the trailer brakes are locked, do not exhaust
the suspension. The resulting movement may
cause damage to or collapse the landing legs.
Always exhaust the suspension BEFORE
locking the brakes.
AXLES NOT EQUALIZING
Mounting height may be incorrect due to
sloping trailer or frame deflection.
The height control valve may be improperly
adjusted. Correct as required.
Check for correct air springs and change if
required.
Check for restrictions in airlines and correct as
required.
TRAILER LEANS TO ONE SIDE
Check axle welds, could be missing or broken.
Trailing beams could be installed out of parallel.
Pivot bushing could be faulty or require
replacement.
Alignment washer welds could be broken or
missing.
BUSHING WALK
This is indicated by the trailing beams shifting
off of the bushings.
Check alignment.
Trailing beams could be installed out of
parallel.
Hangers are not centered to the trailing beams.
Application related and may be caused by
none of the above.
BREAKING / CRACKING HANGERS
See bushing walk.
Insufficient support and/or gusseting.
Missing channel supports and/or gussets.
Alignment washer welds could be broken or
missing.
Application related and may be caused by
none of the above.
M-10