Brochure

To properly align heavy-duty trucks, buses and trailers,
it is necessary to first determine the axle configuration.
On vehicles with more than two axles it is also
necessary to determine which axle should be used as a
reference axle. Some axles are not adjustable,
therefore that axle must be used as the refer ence axle.
Truck/Bus/Trailer Axle Configurations
Truck/Bus/Trailer
Alignment Procedures
The other axles are then aligned to the non-adjustable
reference axle of an all wheel alignment. If all axles are
adjustable, the rearmost drive axle is generally used as
the reference axle.
Use the following diagrams to determine which alignment
procedure should be used for the vehicle being aligned.
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Busses
Trucks