Landoll 330B, Operator'S Manual

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3-1 PRE-COUPLING OF SEMITRAILER AND TRACTOR
3-1.1 Slowly back the tractor up to the front
end of the semitrailer so the kingpin of the
semitrailer is centered between the tractor
fifth wheel jaws. Stop the tractor several
inches ahead of the semitrailer. Set tractor
parking brake.
3-1.2 The king pin plate should be the same
height as, or slightly lower than, the latch
area of the fifth wheel plate of the tractor. If
necessary, connect the tractor hydraulic lines
or start the trailer hydraulic power engine.
Use the TRAILER TILT lever (See Figure
3-2) to raise or lower the kingpin plate suffi-
ciently to allow proper coupling. Drain all air
and moisture from the tractor air brake sys-
tem in accordance with the tractor manufac-
turer’s instructions.
3-1.3 Connect the service and emergency air
hoses of the tractor to their respective glad-
hand on the front of the semitrailer. The trac-
tor’s air hose couplings are then attached
and locked to the appropriate gladhands; the
red emergency line to the gladhand with
the “EMERGENCY” tag, and the blue serv-
ice line to the gladhand with the “SERV-
ICE” tag (See Figure 3-1) . Chock the semi-
trailer wheels before activating the semitrailer
air supply valve in the tractor. Set the semi-
trailer brakes.
3-1.4 Check the air brake operations of the
semitrailer as follows:
a. Apply brakes and inspect brake action on all
wheels for prompt application.
b. Release brakes. All brakes should release
immediately. Air pressure should discharge
quickly from the relay emergency valve.
c. Disconnect the emergency air line from the
semitrailer gladhand. Semitrailer brakes
should promptly set.
d. Re-connect the emergency air line to the
semitrailer and activate the semitrailer air
supply valve. The semitrailer brakes should
set.
3-2 COUPLING OF THE TRACTOR TO THE SEMITRAILER
DANGER
KEEP ALL PERSONNEL CLEAR OF
FRONT, REAR, AND SIDES OF TRAC-
TOR AND SEMITRAILER DURING COU-
PLING, COMPONENT OPERATIONS,
AND UNCOUPLING. FAILURE TO STAY
CLEAR CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH.
3-2.1 Verify the semitrailer wheels are
chocked and brakes function properly.
3-2.2 Make sure the tractor’s fifth wheel cou-
pler is open.
3-2.3 Slowly back the tractor so its fifth wheel
contacts the front of the kingpin plate on the
semitrailer and slips under it. Continue back-
ing until the fifth wheel coupler locks onto the
semitrailer kingpin.
3-2.4 Try to pull the tractor forward a few
inches to verify the vehicle coupling is se-
cure. If the tractor disconnects from the
semitrailer: locate the source of the coupling
failure; repair before continuing; and repeat
Steps 3-2.3 and 3-2.4.
CAUTION
PUSHING SEMITRAILER BACKWARDS
CAN DAMAGE LANDING GEAR.
3-2.5 Check that the tractor couples securely
to the semitrailer before setting tractor and
semitrailer parking brakes.
IMPORTANT
KEEP BRAKES ENGAGED FOR REMAINDER
OF COUPLING, CHECK-OUT, AND PARKING.
3-2