• If you will be towing a trailer frequently in hot weather, hilly
conditions, at GCWR, or any combination of these factors, consider
refilling your rear axle with synthetic gear lubricant if not already so
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 of towing be done at no
faster than 70 mph (113 km/h) with no full-throttle starts.
• When turning make wide turns to allow trailer tires to properly clear
any obstacles.
• Be prepared for trailer sway due to buffeting when larger vehicles
pass in either direction.
Loading
• Keep the center-of-gravity low for best handling.
• 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.
Braking
• 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.
• 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.
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.
2009 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)
Tires, Wheels and Loading
271
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