4-22 F-1005-1018
OPERATING INSTRUCTIONS
TABLE OF CONTENTS
Air Ride Operation
1. Trailer air pressure must be maintained above 90 PSI
before operating. PROTECTION VALVES are used to
maintain 65 PSI air brake pressure during
suspension or remote system air loss.
2. The Model 900 series tandem and triple axle
semitrailer is equipped with a ride control valve
located on rear axle.
CAUTION
CAUTION
Bulkhead (Option)
1. Optional bulkheads may come with or without chain
racks. To remove a bulkhead, disconnect the
electrical harness (if work lights are present), remove
retaining pins holding the bulkhead into the pockets
on the semitrailer front and bolts and nuts attaching
the bulkhead extensions and supports to the deck,
and lift the bulkhead off (See Figure 3-11.)
DANGER
Figure 3-11: Bulkhead (Option)
If suspension air loss should occur, completely
deflate suspension and temporarily operate on
the air springs internal rubber bumpers. Carefully
proceed to the nearest semitrailer service facility.
To deflate the air suspension, disconnect the
lower connection on the linkage of the automatic
air valves. Rotate the valve control arms down
about 45
o
to exhaust the air. To restore to normal
operation, simply reverse the procedure.
Ensure suspension air bags are inflated on all
axles when moving undercarriage from load to
transport position. Failure to do so can cause
excessive tire wear.
To avoid serious injury, all removable
attachments must be firmly attached with
fasteners provided at all times.
CHAIN RACK
BULKHEAD
BULKHEAD
EXTENSION
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