3-2
TOPAZ
3.1.3 TOW VEHICLE
It is the responsibility of the customer to specify,
select and use an appropriate tow vehicle for your
trailer. The combination of tow vehicle specifica-
tions and equipment plus the trailer loading will
determine the handling and stability of the unit while
travelling. Check and comply with all weight and
handling requirements for each state or province
you will be travelling through.
Tow vehicle requirements:
1. Tow Vehicle Specs:
Select a tow vehicle that has sufficient weight
to be stable under all travelling conditions and
has the appropriate equipment for your towing
application (ie. heavy duty radiator and trans-
mission, transmission oil cooler, heavy duty
axle and rear end, suspension, wheels and
tires).
2. Weight and Weight Distribution:
Weigh both the tow vehicle and the trailer to be
sure the tow vehicle, trailer and axles have not
been overloaded. Check the tags on the tow
vehicle and the trailer to determine unit specifi-
cations. Do not exceed the GVWR or axle
capacities of either unit. Weigh to be sure.
Exceeding specifications can shorten compo-
nent life and lead to poor handling characteris-
tics and loss of control.
3. Accessory Equipment:
Always have a certified service shop install the
required accessory equipment (ie. tow hitch,
sway control, coolers, etc.). Be sure the
installer follows the manufacturer's installation
instructions.
4. Tow Hitch:
Always use a hitch that distributes the load
across the rear frame to minimize frame
overloading. Be sure the hitch tow load rating
exceeds the trailer GVWR (Gross Vehicle
Weight Rating). Always use a 2 5/16"-inch ball
on the hitch to handle the hitch loads during
transport. Keep the hitch and hitch ball as
close to the rear bumper as possible. Do not
use hitch extenders.
5. Sway Control:
Always have a sway control system installed
on your tow vehicle to improve handling and
stability. Be sure it is installed and set per the
manufacturers' instructions.
6. Fifth-Wheel Hitches:
Always have a certified repair shop install the
fifth wheel hitch assembly into the tow vehicle.
Be sure the hitch assembly matches the
kingpin size and has a tow load rating greater
than the GVWR (Gross Vehicle Weight Rating)
of your trailer. Do not use hitch extenders.
7. Brakes:
Always install and use a brake controller that
automatically applies the trailer brakes in the
same proportion as the tow vehicle brakes.
The controller should also have the capacity of
applying the trailer brakes independently of the
tow vehicle.
8. Tire Inflation:
Every operator should have an accurate hand-
held gauge for checking tire pressure. Always
check the pressure when the tires are cold and
keep them inflated to their specified pressure
as listed on the tire sidewall. Over or under
inflated tires wear rapidly and adversely affect
the handling and stability of the vehicle.
9. Mirrors:
Always install two rear view mirrors that extend
out past the edge of each side of the trailer to
provide clear visibility to the rear. Check the
rear view mirrors frequently while driving to be
aware of other vehicles on the road. Use a
spotter to assist in directing the trailer when
backing up.
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