2010 Ford F450 Super Duty Crew Cab Owner Guide 2nd Printing - Page 261

Tires, Wheels and Loading equipped. Refer to Maintenance product specifications and capacities in the Maintenance and Specifications chapter for the proper axle lubricant. Remember that regardless of the rear axle lubricant used, do not tow a trailer for the first 500 miles (800 km) of a new vehicle, and that the first 500 miles (800 km) of towing be done at no faster than 70 mph (113 km/h) with no full-throttle starts. Loading • Trailer loads should be evenly distributed front to back and left to right. • The load distribution within the trailer should be such that 10-15% of the trailer weight is on the hitch (15-25% for fifth-wheel or gooseneck towing). • Never exceed truck, trailer, receiver, ball, tongue, tire or coupler loading recommendations. • Keep the center-of-gravity low for best handling. Braking • Anticipate the need to stop; allow much more distance and time to stop than normal. • Do not apply the trailer brakes for extended periods of time as they can overheat and lose effectiveness. • The trailer brakes must be inspected and serviced at intervals specified by the manufacturer. This includes the shoes, drum and trailer brake magnets. • Electric brakes also require periodic adjustment to keep the shoes properly spaced. If the brakes get hot when driving or if they will not hold, chances are that they need adjustment. Backing-up • Practice backing-up, particularly if you are a novice. Turn the steering wheel to the right to move the trailer's rear end to the right. • Sharp steering movements may cause the trailer to jackknife or go out of control. Tires • Select tires that meet the trailer loading requirements. • All trailer tires should be of the same size, and construction. • Always check tow vehicle and trailer tire pressure before towing. 261 2010 F-250/350/450/550 (f23) Owners Guide, 2nd Printing USA (fus)