Landoll 345C, Operator'S Manual

Page: 59 / 64

BRAKES (CONTINUED)
SYMPTOM PROBLEM: REMEDY
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 com-
pressor.
BRAKE WILL NOT APPLY
PROPERLY
Flat spot on cam roller or camshaft: replace and lubricate.
BRAKES 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 sup-
plied with trailer for system function and use of blink code
diagnostics.
5-4 BRAKE DRUMS
For maintenance procedures, see Sections 4-6, 4-7, 4-8, 4-9, 4-10.
SYMPTOM PROBLEM: REMEDY
EXCESSIVE LOSS OF BRAKES
OR FADING
Overheated brake drums: 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.
BRAKES PULL TO EITHER SIDE Drums of different diameters: replace with drums of same di-
ameter.
Foreign matter in drums: clean drums out.
ROUGH OR NOISY BRAKING
ACTION
Defective drums: pull drums and inspect for any of the follow-
ing; 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 re-
place defective part(s).
VIBRATION IN RIDE Defective drums or out-of-round: replace drums.
Out-of-balance drums: balance drums.
5-5