OPERATING INSTRUCTIONS
3-3
Coupling the Tractor to the
Semitrailer
DANGER
1.
Verify the semitrailer wheels are chocked and brakes
function properly.
2.
Make certain the coupler of the towing vehicle’s fifth
wheel is open by pulling the latch handle.
3.
Slowly back the towing vehicle so its fifth wheel
contacts the front of the king pin plate on the
semitrailer and slips under it. Continue backing until
the fifth wheel coupler locks onto the semitrailer
kingpin.
CAUTION
4.
Verify the vehicle coupling is secure by attempting to
pull the tractor forward a few inches. If the tractor
disconnects from the semitrailer, locate source of
coupling failure; repair before continuing; and repeat
and
.
5.
Check that the towing vehicle couples securely to the
semitrailer before setting towing vehicle and
semitrailer parking brakes.
IMPORTANT
Keep brakes engaged for remainder of hookup,
checkout procedures and parking.
Electrical
The only electrical operation required of the operator is
connecting the towing vehicle electrical cable plug into
the semitrailer electrical receptacle.
1.
It is necessary that the tractor blue wire be
connected to the appropriate electrical source on the
tractor.
2.
Connect the towing vehicle 7-pole electrical plug to
the electrical receptacle on the front of the
semitrailer.
IMPORTANT
The key on the plug and the keyway in the socket
must be properly aligned before inserting the plug
into the semitrailer socket.
Keep all personnel clear of front, rear, and sides
of towing vehicle and semitrailer during coupling,
component operations, and uncoupling. Failure
to stay clear can result in serious personal injury
or death.
Pushing the semitrailer backwards can damage
parking stands.
