PRONAR T285/1, Operator'S Manual

Page: 132 / 136

Pronar T285/1 SECTION 5
5.42
5.14 TROUBLESHOOTING
TAB. 5.8 Troubleshooting
FAULT CAUSE REMEDY
Brake system pneumatic
lines not connected Connect brake lines (applies to
pneumatic systems)
Applied parking brake Release parking brake.
Damaged pneumatic
system connection lines
Replace.
Leaking connections
Tighten, replace washers or seal
set, replace lines.
Problem with moving off
Damage control valve or
brake force regulator
Check valve, repair or replace.
Excessive play in bearings Check play and regulate if needed
Damaged bearing Replace bearing Noise in axle hubs
Damaged hub parts Replace
Poor reliability of braking
system Insufficient pressure in
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 lines or
connections. Check system for
tightness.
Incorrect main or parking
brake adjustment Regulate setting of expander arms
or tension of brake cable
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
oil in tractor or in trailer