13
en
10. Check that there is sufficient fuel in the fuel tank(s), and
add if needed. See “Fueling” in the Operation section.
11. Check that the damper system on the heater burner units
operates properly. See “Operating The Heating Unit” in
the Operation section for detailed information on setting
the damper.
12. Check to be sure that the fuel shut-off valve for each
heater unit is in the “open” position.
13. Check that the engine starts and runs properly. See
“Starting The Engine” in the Operation section as well as
the engine operator’s manual for detailed information on
operating the engine.
14. Check that each heater unit starts and runs properly.
See “Operating The Heating Unit” in the Operation sec-
tion for detailed information on operating the heater unit.
15. If the heater trailer is equipped with a duct box, check
that there is sufficient ducting of the correct diameter for
the heater unit outlets in the duct box.
16. Make sure all covers and doors are closed and securely
latched.
Preparing The Unit For Towing
WARNING
Towing a trailer with an underrated tow vehicle, or an
underrated or undersized hitch could result in death or
serious injury. Always use a tow vehicle that has a rated
towing capacity that exceeds the Gross Vehicle Weight
Rating (GVWR) of the trailer, and is equipped with the
appropriate size tow hitch rated for the GVWR of the trailer.
1. Check the tow vehicle’s owner / operator manual for the
maximum rated towing capacity. Make sure the tow vehi-
cle and its trailer hitch are rated to tow the heater trailer.
See “Heater Trailer Weight” for detailed information on
trailer weight.
2. Check the tow vehicle’s lighting connector and make
sure it will mate with the trailer lighting connector on the
heater trailer. Check that the auxiliary power wire on the
tow vehicle is connected and powered to operate the
break-away brake system.
3. The heater trailer is equipped with both a SAE J684
coupler (for 2 inch / 50 mm diameter ball), and a
SAE J847 lunette eye (3 inches / 75 mm diameter).
Determine which is to be used for towing the trailer.
See “Combination Trailer Coupler And Lunette Eye” for
detailed information on changing between the trailer cou-
pler and the lunette eye.
4. Check that the safety chains are properly secured to the
heater trailer tongue, and check the safety chains and
hooks for damage. Replace damaged safety chains and
hooks.
5. Check the trailer lighting connector for damage, and the
trailer lighting wires for damage. Replace or repair dam-
aged lighting connector or wiring.
6. Check the break-away trailer brake system, and make
sure the break-away brake system battery is fully
charged. See “Break-Away Brake System” for detailed
information on the break-away brake system.
7. Check the condition and inflation pressure of the tires.
See “Checking the Tire Pressure” in the Maintenance
section for detailed information on tires and tire inflation
pressures.
WARNING
Towing a trailer with worn, damaged or underinflated tires
could result in death or serious injury. Always replace worn
or damaged tires promptly. Always keep tires inflated to
proper cold tire inflation pressure.
8. Use an appropriate means to support the trailer tongue.
Check that the tongue jack operates properly, and that
the jack lock pin can be locked in the transport position
as well as the trailer support position. See “Operating
The Tongue Jack” for detailed information on operating
the tongue jack.
9. Connect the trailer coupler or lunette eye to the tow vehi-
cle trailer hitch or pintle hook. Connect the safety chains
and trailer lighting connector to the tow vehicle. See
“Connecting The Trailer To The Tow Vehicle” for detailed
information.
10. Make sure all covers and doors are closed and securely
latched.
Combination Trailer Coupler And
Lunette Eye
The heater trailer is equipped with a standard adjustable
height, reversible combination trailer coupler and lunette
eye. The SAE J684 trailer coupler (for 2 inch / 50 mm diam-
eter ball) is rated at 7,000 pounds (3,175 kg) GVWR. The
lunette eye is 3 inches (75 mm) in diameter conforming to
the requirements of SAE J847 for 6,000 pounds (2,722 kg)
GVWR.
To change the position of the trailer coupler and the lunette
eye:
1. Check the tongue, trailer coupler and lunette eye for
missing and damaged parts. Replace any part that is
missing or damaged.
2. Remove the two hex head screws (A, Figure 10) and lock
nuts (B) securing the tubular portion of the lunette eye to
the tongue. Discard the lock nuts.