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SECTION 5
FAULT
Poor reliability of braking
system
Excessive heating of axle
hubs
Incorrect hydraulic
system operation
CAUSE
Damaged bearings
Damaged hub parts
Insufficient pressure in the
system
Incorrect main or parking
brake adjustment
Worn brake linings
Improper hydraulic oil
viscosity
Insufficient tractor hydraulic
pump output, damaged
tractor hydraulic pump.
Damaged or contaminated
cylinder
Excessive cylinder loading
Damaged hydraulic
conduits
5.37
Pronar T663/1 T663/1 SILO
REMEDY
Replace bearings
Replace
Check pressure on tractor
pressure gauge, wait till
compressor fills tank to required
pressure.
Damaged air compressor in
tractor Repair or replace.
Damaged brake valve in tractor.
Repair or replace.
Leaking system conduits or
connections. Check system for
tightness.
Regulate positions of expander
arms
Change brake shoes
Check oil quality, make sure that
the oil in both machines is of the
same type. If necessary change
oil in tractor or in trailer
Check tractor hydraulic pump.
Check cylinder piston rod
(bending, corrosion), check
cylinder for tightness (cylinder
piston rod seal), if necessary,
repair or replace the cylinder.
Check mechanism controlled by
cylinder for mechanical damage
Check and make certain that
hydraulic conduits are tight, not
fractured and properly tightened. If
necessary, replace or tighten.
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