3-6 TOWING THE SEMITRAILER
3-6.1
Driving the tractor with the semitrailer
coupled behind requires constant attention to
the overall length. Turning, passing, acceler-
ating, 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 semi-
trailer in tow will help prevent this situation.
To assure control, brake before descending a
hill or attempting a curve.
CAUTION
WHEN OPERATING SEMITRAILER, DO
NOT BACK OVER CURB. THIS WILL
CAUSE SEVERE DAMAGE TO UNDER-
CARRIAGE AND UNDERCARRIAGE
CYLINDER.
3-6.2
Make a moving test of the semitrailer
brakes at low, and medium speeds before
traveling at highway speeds.
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. 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.
b.
If the warning lamp does not go off, a fault
exists in the trailer ABS. If fault exists, service
using the anti-lock brake system section of
the troubleshooting section of this manual.
CAUTION
IF A FAULT EXISTS IN THE TRAILER
ABS, NORMAL BRAKING WILL OC-
CUR, BUT WHEELS MAY LOCK. SERV-
ICE THE ABS AS SOON AS POSSIBLE.
3-6.3
Monitor the air pressure gauge on the
dash of the tractor. Pressure should not fall
below 80 psi at any time.
3-6.4
The semitrailer wheels track to the in-
side 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.
3-6.5
To stop, use a gradual and smooth appli-
cation of brakes. If grabbing occurs, apply less
pressure. Grabbing brakes are not efficient.
WARNING
ALWAYS CHECK BEHIND AND UNDER
THE TRACTOR AND SEMITRAILER
FOR PERSONS OR OBJECTS BEFORE
MOVING. FAILURE TO CHECK CAN
LEAD TO SERIOUS PERSONAL IN-
JURY, DEATH, OR DAMAGE TO PROP-
ERTY.
3-6.6
Backing should be done with care. Tail
overhang, semitrailer length, and allowable
space must be taken into consideration.
3-5
Summary of Contents for 336C
Page 3: ...MODEL 336C CAR CARRIER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO...
Page 8: ......
Page 24: ...3 12 Figure 3 7 Lining Up the Over the Cab Deck Figure 3 8 Loading the Over the Cab Deck...
Page 28: ...3 16 Figure 3 11 Loading the Lower Deck...
Page 32: ...3 20 Figure 3 13 Rear Impact Guard and Antilock Brake System...
Page 40: ...4 6 Figure 4 3 336C Wiring Diagram...
Page 45: ...4 11 Figure 4 7 Checking Axle for Bend Figure 4 8 Examples of Camber...
Page 50: ...4 16 Figure 4 12 Axle and Brake Assembly...
Page 54: ...4 20 Figure 4 14 Outboard Mount Hub and Drum Figure 4 15 Inboard Mount Hub and Drum...
Page 59: ...4 25 Figure 4 19 Mounting Tires and Wheels Figure 4 20 Stud Tightening Sequence...
Page 70: ...NOTES 5 10...
