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Parking the Trailer
1. Position truck/semitrailer rig on a level, solid surface.
2. Set the PARKING BRAKE, not the semitrailer
hand brake, and check for proper brake holding.
3. Chock wheels of semitrailer.
4. Check for any air leaks in lines, relay valve, brake
pods, or any other air system component.
OPERATING INSTRUCTIONS
Uncoupling Towing Vehicle from
Semitrailer
1. Park the semitrailer according to instructions in
"Parking the Trailer" on page 3-7.
2. Disconnect the emergency and service air lines and
attach them to the tractor gladhand holders. If
present, install dummy gladhands on trailer
couplings.
3. Disconnect the 12 volt 7-pin or 24 volt 12-pin cable
from the semitrailer and store with the tractor.
4. Pull the tractor fifth wheel plate latch release lever.
5. Attempt to pull the tractor forward. If the tractor
uncouples, verify all service lines are disconnected
and semitrailer wheels are chocked. If tractor does
not disconnect, repeat steps 4 and 5.
6. Pull the tractor away from the semitrailer.
Always check behind and under the truck and
semitrailer for persons or objects before moving.
Failure to check can lead to serious personal
injury or death to others, or damage to property.
DANGER
3-7
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