Brake Drums - Landoll 345E Operator's Manual

PROBLEM
BRAKES GRABBING
EXCESSIVE LEAKAGE WITH BRAKES
APPLIED
EXCESSIVE LEAKAGE WITH
EMERGENCY SYSTEM ONLY APPLIED -
NO LEAKAGE WITH NORMAL BRAKING
EXCESSIVE WATER PRESENT IN
BRAKE SYSTEM
EXCESSIVE OIL PRESENT IN BRAKE
SYSTEM
BRAKE WILL NOT APPLY PROPERLY
BRAKE WILL NOT APPLY WHEN
EMERGENCY LINE IS DISCONNECTED
ABS WARNING LIGHT STAYS ON

Brake Drums

For maintenance procedures, refer to the following
sections:
PROBLEM
EXCESSIVE LOSS OF BRAKES OR
FADING
BRAKES PULL TO EITHER SIDE
ROUGH OR NOISY BRAKING ACTION
VIBRATION IN RIDE
PROBABLE CAUSE
Grease on brake linings
Brake rigging binding
Defective brake valve on tractor
Defective relay emergency valve
Relay emergency valve leaking
Leaking tubing or hose
Relay emergency valve leaking
Leaking brake chamber diaphragm
Leaking tubing or hose
Defective relay emergency valve
Reservoir not drained often enough
Compressor on tractor passing excessive
oil
Flat spot on cam roller or camshaft
Initial air pressure too low
Defective relay valve
Air line leak
Brake chamber leak
Refer to Rockwell WABCO ABS maintenance manual supplied with trailer for system
function and use of blink code diagnostics.
• "Suspension Maintenance" on page 4-9
• "Alignment" on page 4-10
• "Brake System Maintenance" on page 4-13
• "Hub and Drum Maintenance" on page 4-19
• "Wheel Bearing Lubrication and Adjustment" on
PROBABLE CAUSE
Overheated brake drums
Drums of different diameters
Foreign matter in drums
Defective drums
Defective drums or out-of-round
Out-of-balance drums
Reline brakes
Align brakes or replace bent parts
Repair or replace valve
Repair or replace valve. Excessive
leakage with brakes released.
Repair or replace valve
Replace defective part
Repair or replace valve
Replace diaphragm
Replace defective part
Repair or replace valve
Drain reservoir daily
Repair compressor
Replace and lubricate
Allow air system to build up to minimum 90
PSI and stabilize
Repair or replace valve
Locate leak and repair
Locate leak and repair or replace
page 4-21
Check for defective or misadjusted brake
linings, distorted or over-machined
drums. Also check for operating
conditions or loads that create severe
or excessive brake applications.
Replace with drums of same diameter.
Clean drums out
Pull drums and inspect for any of the
following. Heat spotted drums, grease
spotting, blue drums, scored drums,
excessive wear at rivet holes or edges,
polished drums, out of round drums,
unbalanced drums, worn/damaged
brake components, foreign matter in
drums. Correct situation or replace
defective part(s).
Replace drums
Balance drums
TROUBLESHOOTING
SOLUTION
SOLUTION
5-5