Landoll 345E, Operator'S Manual

Page: 55 / 62

TROUBLESHOOTING
5-3
Brakes
For maintenance procedures, see “Brake System
Maintenance” on page 4-13.
BROKEN STUDS Over tightening Use correct torque when mounting (See
“Standard Specifications” on
page 2-1.)
REPLACE BROKEN STUDS BEFORE USING THE SEMITRAILER!
TRAILER TRACKING PROBLEMS:
TRACKS TO ONE SIDE Axle alignment Re-align axle (See “Axle Alignment” on
page 4-12.)
TRACKS TO EITHER SIDE Broken or bent springs or equalizers Replace defective parts
Axles not parallel Realign axles
AIR RIDE HEIGHT PROBLEMS (See “Air Ride Height Adjustment” on page 4-9.):
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
PROBLEM PROBABLE CAUSE SOLUTION
NO BRAKES OR BRAKES ARE
INTERMITTENT Brake air system improperly connected Reconnect hand valve properly
Relay/Emergency valve plugged Clean valve
Defective tractor protection valve Repair or replace
Restricted tubing or hose line Locate and eliminate restriction
Broken line Locate break and repair
Tractor air system failure Troubleshoot tractor air system and repair