Checking Boat Trailer Axle Alignment

Posted: February 28, 2014 in Boats, Parts and Accessories, Shopping, Trailers, Uncategorized, Vehicles
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If you notice that some or all of the tires on your trailer are losing their tread faster than expected, this is can be a sign that your boat trailer axles are out of alignment. To rule out any other possible issues, the following method will allow you to check the alignment on your axles with nothing but a straightedge and a tape measure.

Your straightedge must be relatively long for multi-axle trailers. It should be at least long enough to extend across both tires of an axle pair. A straight piece of pipe or an angle iron works well for this application, if you can get your hands on either one.

On a multi-axle trailer, hold the straightedge flat against two tires. If the axles on these wheels are aligned, there should be no gaps between the straightedge and its points of contact on the tires’ sidewalls. Otherwise, this is symptomatic of a misaligned axle.

To find out which axle is misaligned, hold the straightedge up flat against one tire. Then, measure the distance between the straightedge and trailer frame. The distances should be same on either side of the wheel. If they aren’t then that wheel is misaligned with the trailer frame. This last procedure is also used to diagnose the alignment of single-axle trailers.


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