How It Works

Prior to using the Axletrac Alignment Tool, ensure the proper positioning of the trailer and axles according to the trailer or suspension manufacturer’s recommendations. A summary of these recommendations can be found in the Axletrac Owner’s Manual.

Ensure the bullseye level shows the bubble in the center. This indicates that the kingpin is accurately extended to the ground for a reproducible and precise measurement.

The measuring tape is hooked onto the tape hook near the ground and the tape measure is carried to the rear of the trailer ensuring there are no obstructions between the kingpin extender and the axle end extender.

The extension tube is threaded onto the wheel stud of the foremost axle nearest to the 6 o’clock position. Once snug, loosen the tube by ¼ turn for effortless installation of the span bar later.

After repeating this process using the second extension tube on the stud nearest the 12 o’clock position, you will install the span bar. The extension tubes are delivered with grease inside the pin holes for easier installation and removal. The pins of the span bar must be greased prior to each use to ensure effortless installation and removal of the span bar.

Depending on the length of the studs, the internal threads will either run out or the end of the tube will bottom out on the lug. Either of these ensures accuracy and precision of measurement.

Once the span bar is fully seated into the extension tubes, it is crucial to tighten the extension tubes onto the studs again. This step ensures a secure fit and maintains measurement accuracy.

This is a properly placed axle end extender.

Important Note: The extension tubes will apply to both 10-stud and 8-stud wheel hubs. However, the span bar will not. Span bars for 8-stud wheel hubs are sold separately.

With the kingpin extender and the axle end extenders properly installed on both wheels of the foremost axle, utilize the measuring tape, clamp and tension meter to ensure equal tension when measuring each wheel. The measurement is taken from the front edge of the circular pin protruding outward from the span bar.

Once the foremost axle has been aligned within the parameters specified by your trailer or suspension manufacturer, a second set of axle end extenders can be installed on the rearmost axle to save time and increase accuracy.

Very simply utilize a measuring tape from the pin of the foremost axle end extender to the front edge of the pin of the rearmost axle end extender for accurate rear axle measurement. Once rear axle measurement is within the parameters of the trailer or suspension manufacturer’s recommendations uninstall the axle end extenders by removing the span bar and completely unscrewing the extension tubes.