2012 Lincoln Navigator Owner Guide 1st Printing - Page 218

Tires, Wheels and Loading 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. Maximum Trailer Maximum Tongue Weight - lb (kg) 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. 218 Mode 2012 Navigator (nav) Owners Guide, 1st Printing USA (fus)