PRONAR PT510, Operator'S Manual, Page: 130 / 133

Pronar PT510 SECTION 5
5.38
FAULT CAUSE REMEDY
Poor reliability of braking
system Insufficient pressure in the
system
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.
Incorrect main or parking
brake adjustment Regulate positions of expander
arms
Excessive heating of axle
hubs
Worn brake linings Change brake shoes
Improper hydraulic oil
viscosity
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
Insufficient tractor hydraulic
pump output, damaged
tractor hydraulic pump.
Check tractor hydraulic pump.
Damaged or contaminated
cylinder
Check cylinder piston rod
(bending, corrosion), check
cylinder for tightness (cylinder
piston rod seal), if necessary,
repair or replace the cylinder.
Excessive cylinder loading
Check mechanism controlled by
cylinder for mechanical damage
Incorrect hydraulic
system operation
Damaged hydraulic
conduits
Check and make certain that
hydraulic conduits are tight, not
fractured and properly tightened. If
necessary, replace or tighten.