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Date of Origin – 02/24/11
Updated – 02/03/20
AXLE ALIGNMENT
Proper axle alignment is a vital part of trailer maintenance. Failure to maintain proper alignment may cause tire
scrubbing and suspension component strain. Your trailer’s alignment should be checked regularly and the axles
realigned when required to prevent unnecessary tire wear.
1. To properly align the suspension make sure the trailer is unloaded. Free the suspension of any “binds” by
rst pushing the trailer backwards and then pulling it forward a sufcient distance. Check axle alignment
with the trailer on a level surface with the trailer level both side to side and front to back, with tires properly
inated, trailer securely restrained, trailer brakes (service & parking) released and with the trailer ride height
valve properly set (if an air ride).
2. Check each dual tire set. Tires of each set must be matched to a maximum of 1/8” tire radius. Air pressure
must be the same in all tires.
3. Using a steel measuring tape, measure from the center point on the bottom of the king pin to identical
locations on each end of the front axle using a consistent amount of pressure on the tape measure.
4. If these measurements differ by more than 1/16”, adjust one end of the front axle forward or rearward until
identical measurements are obtained on both ends.
5. After the front axle is aligned and secured, measure from the end of the front axle to the end of the rear axle
on each side.
6. If these measurements differ by more than 1/16”, adjust one end of the rear axle forward or rearward until
identical measurements are obtained on both ends.
Air ride suspensions are equipped with mechanisms to allow the movement of one end of the axle forward or
rearward for the purpose of aligning the trailer axles.
Inspect the hanger pivot bushings as well as all other suspension components before adjusting the alignment.
The SAF Holland CBX23 suspension with the Quik Align feature uses a bolt on the front
the suspension hanger to allow for adjustment for axle alignment.
1. Using a hand wrench, rotate the Quick Align bolt clockwise to shorten the alignment measurement or count-
er clockwise to lengthen the alignment measurement.
AIR-RIDE SUSPENSION SYSTEMS
See suspension manufacturer’s decals prominently displayed on trailer body and manufacturer literature kit
supplied with trailer for details and specic instructions on the care and maintenance of the air ride suspension.
NOTE: Never move an air ride trailer without rst fully inating the air springs – failure
to do so could cause damage to the trailer and suspension and will void the warranty.
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