Integrated hitch rating
The standard integrated hitch has two ratings depending on mode of
operation:
•
Weight-carrying
- requires a draw bar and hitch ball. The draw bar
supports all the vertical tongue load of the trailer.
•
Weight-distributing
- requires an aftermarket weight-distributing
system which includes draw bar, hitch ball, spring bars and snap-up
brackets. The vertical tongue load of the trailer is distributed between
the truck and the trailer by this system.
Mode
Maximum Trailer
Weight - lb (kg)
Maximum Tongue
Weight - lb (kg)
Weight-carrying
6000 (2721)
600 (272)
Weight-distributing
9000 (4082)
900 (408)
These are hitch ratings only; actual vehicle ratings are dependent on
engine, transmission and axle combinations.
WARNING:
Towing trailers beyond the maximum tongue weight
exceeds the limit of the towing system and could result in
vehicle structural damage, loss of vehicle control and personal injury.
Weight-distributing hitch – vehicles without air suspension
When hooking-up a trailer using a weight-distributing hitch, always use
the following procedure:
1. Park the vehicle (without the trailer) on a level surface.
2. Measure the height of the top of the front wheel opening on the
fender, this is H1.
3. Attach the trailer to the vehicle without the weight distributing bars
connected.
4. Measure the height of the top of the front wheel opening on the
fender a second time, this is H2.
5. Install and adjust the tension in the weight distributing bars so that
the height of the front fender is approximately halfway between H1 and
H2.
6. Check that the trailer is level. If not level, remove the trailer, adjust
the ball height accordingly, and repeat steps 3 – 6.
Tires, Wheels and Loading
218
2012 Navigator
(nav)
Owners Guide, 1st Printing
USA
(fus)
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