Landoll 330C, Operator'S Manual

Page: 14 / 64

3-4 F-475-0611 Edition
OPERATING INSTRUCTIONS
Towing the Semitrailer
1. Driving the tractor with the semitrailer coupled behind
requires constant attention to the overall length.
Turning, passing, accelerating, braking, stopping,
and back-up require special considerations. When
executing steep grades or turning tight curves, the
semitrailer must not be allowed to push the tractor, or
jackknifing may result. Application of the semitrailer
brakes to keep the semitrailer in tow will help prevent
this situation. To assure control, brake before
descending a hill or attempting a curve.
2. Make a moving test of the semitrailer brakes at low
and medium speeds
before traveling at highway
speed.
a. The Anti-Lock Brake System (ABS) warning
lamp mounted at left rear side of the trailer
should come on when power is supplied to the
ABS by turning the tractor keyswitch on. The
warning lamp should go off once the trailer
exceeds 4 mph. If the warning lamp does not go
off, a fault exists in the trailer ABS. Once the
vehicle speed exceeds 4 mph, the light should
remain off unless a fault occurs or the keyswitch
is turned off, then on again.
3. Monitor the air pressure gauge on the dash of the
tractor. Pressure should not fall below 90 psi at any
time.

CAUTION
4. The semitrailer wheels track to the inside of the
tractor during turns. Thus, turning corners requires a
wide swing to prevent “curb hopping”, and to allow
the semitrailer wheels to clear any obstacle on the
inside of the corner.
5. To stop, use a gradual and smooth application of
brakes. If grabbing occurs, apply less pressure.
Grabbing brakes are not efficient.

DANGER
6. Backing should be done with care. Tail overhang,
semitrailer length, and allowable space must be
taken into consideration.
When operating trailer, do not back over curb.
This will cause severe damage to undercarriage
and undercarriage cylinder.
Always check behind and under the tractor and
semitrailer for persons or objects before moving.
Failure to check can lead to serious personal
injury, death, or damage to property.