Archived Tech Tip: 10/07/05

Trailer Safety

Tow Vehicle - Match up the suspension and brakes on a tow vehicle with the weight of the trailer you intend to pull. Talk to the manufacturer of both vehicles to assure the proper weight on the hitch. Create a safety net by selecting a tow vehicle that exceeds the maximum amount of power, brakes and suspension needed to pull the trailer.

Hitch - The difference between towing a travel trailer and fifth wheel is the hitch. Travel trailers utilize a hitch and ball system. The ball should be positioned to seat the trailer level when connected. Keep the ball lightly greased for smooth rotation of the coupler. Fifth wheel hitch systems can include a fifth wheel plate, handle, hitch plate, pin, pin box, plate jaws and side rails. Seek the services of a qualified hitch specialist that can assist you with installation.

Safety Chains - Safety chains should be long enough to allow for tight turns, but not drag on the pavement. Cross the safety chains to create a saddle as a back-up safety measure against tongue failure.

Brakes - You can never have too much braking power when towing a trailer. Make sure the brakes on your tow vehicle are always maintained in good condition. Avoid overheating the brakes when descending steep inclines by shifting down to a lower gear and using the brakes sparingly.

Load - Cargo must be evenly distributed to prevent undue stress on the trailer hitch, and should also be within the limits of the manufacturer's recommendations for weight. Attempting to overload the trailer can create a dangerous situation when braking and steering the tow vehicle. Make sure the load is evenly distributed between sides to avoid problems when cornering. Situate loads to insure that all items are protected in their locations while the trailer is traveling down the road. Objects tied on to the rear bumper or across the tongue frame may compromise tongue weight and road handling.

Lights and Connections - Connectors can corrode from exposure. Firmly seat the connector and perform a check of all exterior lights each time you hook up the trailer. Failure of lights to engage may be due to loose bulbs or wiring, or a blown fuse.

Driving - Towing a travel trailer or fifth wheel requires skill. If you are new to towing a trailer, practice before the trailer is loaded with cargo. Practice driving in light traffic conditions and areas that will allow you to concentrate and take your time. Learn to descend a steep grade without over-stressing the brakes. Swing wide to clear inside obstacles when making a turn. If the trailer begins to sway while driving down the road, keep the steering wheel straight and remove your foot from the accelerator. If the problem isn't corrected by traveling at a slower speed, pull over as soon as practical to examine the trailer for potential problems. Be aware of severe dips or bumps in the road that can cause sudden increased weight on the hitch, axles and tires. Roadway imperfections are taken into consideration at the time of trailer manufacturer, but overloading or aging of the hitch and tongue can be quickly stressed. Watch for bumps and large dips in the road and slow down for them.

Tires - Weigh the trailer empty, and then fully loaded, to determine the air pressures. Tire air pressures should be checked at each stop. Thump the tires with a tire iron and make sure they all sound the same. During fuel stops walk around and touch each tire with your hand. A tire that is low on air will be hotter than the rest. At least one time each day, take air pressure readings when the tires are cold.

Wheels - Trailer wheels are subject to flexing that will tend to loosen lug nuts over time. Check lug nut torque between each trip. If a tire is new, check the lug nut torque before leaving on a trip, and again at fifty miles. Lug nut torque and tightening pattern will depend on the particular trailer manufacturer's recommendation. Have the torque wrench calibrated at least one time each year to assure accuracy. Annually clean, inspect and repack the wheel bearings. A hot wheel bearing requires immediate attention.

Inspection - Give yourself plenty of time when hooking up. Examine the hitching system for signs of rust or wear. Perform a light check. Chock the wheels whenever the trailer is detached from the tow vehicle to prevent rolling. Avoid detaching the trailer from the tow vehicle on a grade.