TROUBLESHOOTING GUIDE
5-3
BENDING OR WARPING
Curb-hopping or potholes
Adjust turning practices and adjust speed
accordingly with road conditions.
Improper tightening sequence
Follow proper tightening sequence
BROKEN STUDS*
Over tightening
Use correct torque when mounting
*REPLACE BROKEN STUDS BEFORE USING THE SEMITRAILER!
SEMITRAILER TRACKING PROBLEMS:
TRACKS TO ONE SIDE
Axle alignment
Re-align axle
TRACKS TO EITHER SIDE
Broken or bent springs or equalizers
Replace defective parts.
Axles not parallel
Re-align axles
AIR RIDE HEIGHT PROBLEMS:
TOO HIGH
Axle to control valve linkage
Readjust linkage.
Height Control Valve internal leak
Repair or replace valve.
TOO LOW
Axle to control valve linkage
Readjust linkage.
Height Control Valve filter plugged
Clean or replace valve.
Pressure Protection Valve filter plugged
Clean or replace valve.
System air pressure low (65 PSI minimum
required)
Troubleshoot air supply.
UNEVEN FROM SIDE TO SIDE
Linkage adjustment
Readjust linkage
Exhaust port plugged
Clean or replace valve(s).
Height control valve internal leak
Repair or replace valve.
Supply line to one height control valve
pinched, restricted, or plugged
Repair or replace line.
PROBLEM
PROBABLE CAUSE
SOLUTION
Summary of Contents for 855C HD Series
Page 2: ......
Page 6: ...iv F 669 0113 Edition...
Page 48: ...4 20 F 669 0113 Edition MAINTENANCE AND LUBRICATION Figure 4 12 Axle and Brake Assembly...
Page 65: ...TROUBLESHOOTING GUIDE 5 9 Notes...
Page 66: ...5 10 F 669 0113 Edition TROUBLESHOOTING GUIDE...
Page 67: ......