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PROBLEM
BENDING OR WARPING
BROKEN STUDS*
*REPLACE BROKEN STUDS BEFORE USING THE SEMITRAILER!
SEMITRAILER TRACKING PROBLEMS:
TRACKS TO ONE SIDE
TRACKS TO EITHER SIDE
AIR RIDE HEIGHT PROBLEMS:
TOO HIGH
TOO LOW
UNEVEN FROM SIDE TO SIDE
PROBABLE CAUSE
Curb-hopping or potholes
Improper tightening sequence
Over tightening
Axle alignment
Broken or bent springs or equalizers
Axles not parallel
Axle to control valve linkage
Height Control Valve internal leak
Axle to control valve linkage
Height Control Valve filter plugged
Pressure Protection Valve filter plugged
System air pressure low (65 PSI minimum
required)
Linkage adjustment
Exhaust port plugged
Height control valve internal leak
Supply line to one height control valve
pinched, restricted, or plugged
TROUBLESHOOTING GUIDE
SOLUTION
Adjust turning practices and adjust speed
accordingly with road conditions.
Follow proper tightening sequence (See
Figure 4-22.)
Use correct torque when mounting (See
Table 2-1)
Re-align axle (See "Axle Alignment" on
page 4-18.)
Replace defective parts.
Re-align axles
Readjust linkage.
Repair or replace valve.
Readjust linkage.
Clean or replace valve.
Clean or replace valve.
Troubleshoot air supply.
Readjust linkage
Clean or replace valve(s).
Repair or replace valve.
Repair or replace line.
5-3
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