Trailer Jockey Operators Handbook
25
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Remember, even a minor defect can become serious. Report all
defective equipment immediately.
Prop shaft MUST be disconnected for towing to prevent dam-
age to transmission.
If possible, haul a defective machine to the repair area. Avoid
towing it. If towing is unavoidable, the parking brakes may be
released by pushing the cab parking brake control in, provided
adequate air pressure is available. The parking brakes may be
released manually at the rear brake chambers. These manual
releases must be removed when the towing is completed in
order to re-engage the parking brakes.
To avoid personal injury or property damage when manually
releasing the spring brakes, be sure to block the wheels so that
vehicle cannot move when the brakes are released.
Under no circumstances should a spring brake chamber
assembly be disassembled without following the procedures
described in the service manual. Bypassing these procedures
may result in severe personal injury or death.
To manually release parking brakes for towing, remove cover
plug and special bolt from housing and insert bolt in chamber
and turn 1/4 turn. Tighten nut with 3/4-inch wrench until
spring is compressed - releasing brakes.
This is an emergency procedure only. The spring brake
chamber must be returned to automatic application by
removing special bolt and replacing bolt and cap in proper
places before operating the Trailer Jockey. A flashing red light
is provided to warn the operator that the parking brake is
applied.
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