3-5 TOWING VEHICLE AND TRAILER HOOK-UP AND CHECK-OUT
WARNING
FAILURE TO PROPERLY SET AND
CHECK PARKING BRAKE, AND
CHOCK WHEELS WHEN PARKING
AND DURING STORAGE, COULD AL-
LOW
MOVEMENT
OF
THE
TRUCK/TRAILER RIG RESULTING IN
SERIOUS PERSONAL INJURY, DEATH,
OR DAMAGE TO PROPERTY IN ITS
PATH.
3-5.1
Assure landing gear is raised up all the
way.
3-5.2
Attach safety chains from the trailer to
the towing vehicle.
3-5.3
For electric brake breakaway system,
attach brake breakaway cable to towing vehi-
cle. Allow slack in cable for turning. Make
sure breakaway battery is charged and
breakaway system is working properly.
3-5.4
Check your maintenance schedule and
be sure everything is up-to-date.
3-5.5
Set parking brake and carefully remove
all wheel chocks. If brakes are not properly
set, the truck/trailer may roll when removing
wheel chocks.
3-6 TOWING THE TRAILER
3-6.1
Driving the towing vehicle with the trailer
coupled behind requires constant attention to
the overall length of the combination. Turn-
ing, passing, acceleration, braking, stopping,
and back-up require special attention to the
“hinged-in-the-middle” configuration of the
trailer. When executing steep grades or turn-
ing tight curves, the trailer must not be al-
lowed to push the towing vehicle, or jackknif-
ing the trailer with the towing vehicle may re-
sult. Application of the trailer brakes to keep
the trailer in tow will help prevent this push-
ing. Braking should begin before descending a
hill or attempting a curve, to assure control.
3-6.2
Make a moving test of the trailer brakes
at low, and medium speeds
before
traveling
at highway speed.
3-6.3
For trailer with air brakes, monitor the
air pressure gauge on the dash of the towing
vehicle. Pressure should not fall below the
85 to 95 psi range at any time.
3-6.4
The trailer wheels track to the inside of
the towing vehicle during turns. Thus, turning
corners requires a wide swing to prevent
“curb hopping”, and to allow the trailer
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.
DANGER
ALWAYS CHECK BEHIND AND UNDER
THE TRUCK AND TRAILER FOR PER-
SONS OR OBJECTS BEFORE MOVING.
FAILURE TO CHECK CAN LEAD TO
SERIOUS PERSONAL INJURY OR
DEATH TO OTHERS, OR DAMAGE TO
PROPERTY.
3-6.6
Backing should be done with care. Tail
overhang, trailer length, and allowable space
must be taken into consideration.
3-6.7
The load on the trailer should be posi-
tioned so a minimum of 8% of the total
weight and a maximum of 30% of the total
weight is on the hitch.
3-6
Содержание L20 Series
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Страница 15: ...3 3 Figure 3 3 Electrical Assembly For Trailer w Electric Brakes...
Страница 16: ...3 4 Figure 3 4 Electrical Assembly For Trailer w Air Brakes...
Страница 26: ...4 6 Figure 4 3 Axle and Brake Assembly...
Страница 35: ...4 15 Figure 4 12 Mounting Tires and Wheels Figure 4 13 Stud Tightening Sequence...
Страница 39: ...NOTES 4 19...
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