5-4
F-482-0510 Edition
TROUBLESHOOTING
BRAKES RELEASE TOO SLOWLY
Brakes need adjusting or lubrication
Adjust or lubricate as needed
Brake rigging binding
Align brakes or replace bent parts
Exhaust port or relay valve restricted or
plugged
Clean valve
Tractor pressure too low
Adjust to provide 105 psi min.
ALL BRAKES DO NOT RELEASE
Air system improperly connected to tractor
Tighten or adjust connections
Brake valve on tractor is applied
Release brake
Relay emergency valve in emergency
position
Check line pressure and check valve
Restricted tubing or line
Locate restriction and remove
Defective tractor protection valve
Troubleshoot tractor air system
Parking brakes locked
Troubleshoot air system
Tractor pressure too low
Adjust to provide 105 psi min.
INSUFFICIENT BRAKES
Brakes need adjusting
Adjust brakes
Brakes need lubricating
Lubricate brakes
Brakes need relining
Reline brakes
Low air pressure
Troubleshoot air system
Defective relay emergency valve
Repair or replace
Brakes overheeated
Stop and allow brakes to cool, locate
cause of overheating
BRAKES GRABBING
Grease on brake linings
Reline brakes
Brake rigging binding
Align brakes or replace bent parts
Defective brake valve on tractor
Repair or replace valve
Defective relay emergency valve
Repair or replace valve. Excessive
leakage with brakes released.
Relay emergency valve leaking
Repair or replace valve
Leaking tubing or hose
Replace defective part
EXCESSIVE LEAKAGE WITH BRAKES
APPLIED
Relay emergency valve leaking
Repair or replace valve
Leaking brake chamber diaphragm
Replace diaphragm
Leaking tubing or hose
Replace defective part
EXCESSIVE LEAKAGE WITH
EMERGENCY SYSTEM ONLY APPLIED -
NO LEAKAGE WITH NORMAL BRAKING
Defective relay emergency valve
Repair or replace valve
EXCESSIVE WATER PRESENT IN
BRAKE SYSTEM
Reservoir not drained often enough
Drain reservoir daily
EXCESSIVE OIL PRESENT IN BRAKE
SYSTEM
Compressor on tractor passing excessive
oil
Repair compressor
BRAKE WILL NOT APPLY PROPERLY
Flat spot on cam roller or camshaft
Replace and lubricate
BRAKE WILL NOT APPLY WHEN
EMERGENCY LINE IS DISCONNECTED
Initial air pressure too low
Allow air system to build up to minimum 90
PSI and stabilize
Defective relay valve
Repair or replace valve
Air line leak
Locate leak and repair
Brake chamber leak
Locate leak and repair or replace
ABS WARNING LIGHT STAYS ON
Refer to Rockwell WABCO ABS maintenance manual supplied with trailer for system
function and use of blink code diagnostics.
PROBLEM
PROBABLE CAUSE
SOLUTION
Содержание 345D
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Страница 22: ...3 10 F 482 0510 Edition OPERATING INSTRUCTIONS Figure 3 4 Steps for Loading and Unloading...
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Страница 41: ...MAINTENANCE AND LUBRICATION 4 11 Figure 4 5 Examples of Camber Figure 4 6 Checking Axle for Bend...
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