Lippert Components Trailer Axle (8-12K) - Manual (Page 19)

Rev: 04.18.2014
Page 19
Trailer Axle 8-12K Owners Manual FULL
Tires
Prior to mounting tires onto wheels, be sure the rim size and contour are approved by the Tire and Rim
Association Yearbook or the tire manufacturers catalog. In addition, confirm that the tire will carry the rated
load. If the load is not evenly distributed on all tires, use the tire rated for the heaviest wheel position.
The Rubber Manufacturers Association or the tire manufacturers guidelines should be consulted for
mounting procedures.
Tire inflation pressure is the most important factor in tire life. Tire pressure should always be what is
recommended by the manufacturer for the load. Always check pressure cold before operation. DO NOT
bleed air from tires when they are hot. Check inflation pressure weekly during use to insure maximum tire
and tread life.
The following tire wear diagnostic chart will help you pinpoint the causes and solutions of tire wear
problems.
NOTE: Tire wear should be checked frequently because once a wear pattern becomes firmly established in a
tire it is difficult to stop, even if the underlying cause is corrected.
Problem Probable Cause Corrective Action
Center Wear Over-inflation
Adjust pressure to particular load
per tire catalog.
Edge Wear Under-inflation
Adjust pressure to particular load
per tire catalog.
Side Wear Loss of camber or overloading
Make sure load does exceed
axle rating. Call Lippert Service &
Warranty to advise.
Toe Wear Incorrect Toe-in
Call Lippert Service & Warranty to
advise.
Cupping Out-of-balance
Check bearing adjustment and
balance tires.
Flat Spots Wheel lockup and tire skidding
Avoid sudden stop if possible and
adjust brakes.