Coupling Of The Tractor To The Semitrailer; Connecting Tractor Services To The Semitrailer - Landoll 334C Operator's Manual

3-3 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.
3-3.1 Verify the
chocked and brakes function properly.
3-3.2 Make sure the tractor's fifth wheel cou-
pler is open.

3-4 CONNECTING TRACTOR SERVICES TO THE SEMITRAILER

3-4.1 Connect the tractor 7-pole electrical plug
to the electrical receptacle on the front of the
semitrailer (See Figure 3-1).
3-4.2 Connect the 4-pole electrical cable from
the over-the-cab deck (331) to the semitrailer
4 pole electrical receptacle.
semitrailer wheels
PUSHING SEMITRAILER BACKWARDS
CAN DAMAGE LANDING GEAR.
3-3.3 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.
3-3.4 Try to pull the tractor forward a few
inches to verify the vehicle coupling is se-
are
cure. If the tractor disconnects from the
semitrailer: locate the source of the coupling
failure; repair before continuing; and repeat
Steps 3-3.3 and 3-3.4.
3-3.5 Check that the tractor couples securely
to the semitrailer before setting tractor and
semitrailer parking brakes.
KEEP BRAKES ENGAGED FOR REMAINDER
OF COUPLING, CHECK-OUT, AND PARKING.
THE KEY ON THE PLUG AND THE KEYWAY IN
THE SOCKET MUST BE PROPERLY ALIGNED
BEFORE INSERTING THE PLUG INTO THE
SEMITRAILER SOCKET.
HYDRAULIC OPERATING PRESSURES
GREATER THAN 2500 PSI CAN CAUSE
DAMAGE TO THE TRAILER.
3-4.3 Connect the tractor hydraulic lines to
the semitrailer.
3-4.4 Air Lines: See Section 3-2.
CAUTION
IMPORTANT
IMPORTANT
CAUTION
3-3