PRONAR T669XL, Operator'S Manual, Page: 131 / 135

SECTION 5 Pronar T669XL, Pronar T700XL
5.45
5.13 TROUBLESHOOTING
TABLE 5.9 Troubleshooting
FAULT CAUSE REMEDY
Brake system pneumatic
conduits not connected Connect brake conduits (applies
to pneumatic systems)
Applied parking brake Release parking brake.
Damaged pneumatic
system connection conduits
Replace.
Leaking connections
Tighten, replace washers or seal
sets, replace conduits.
Problem with moving off
Control valve or braking
force regulator damaged
Check valve, repair or replace.
Excessive bearing
slackness Check slackness and adjust if
needed
Damaged bearing Replace bearings.
Noise in axle hubs
Damaged hub parts Replace.
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 setting of expander arms
Excessive heating of axle
hubs
Worn brake linings Change brake shoes
Incorrect hydraulic
system operation
Improper hydraulic oil
viscosity Check oil quality, make sure that
the oil in both machines is of the
same type. If necessary change