PRONAR T386, Operator'S Manual, Page: 153 / 162

SECTION 5 Pronar T386
5.43
FAULT REASON REMEDY
Low pressure in pneumatic
system Ensure proper pressure in the
system
Control valve or braking
force regulator damaged
Check valve, repair or replace
Excessive bearing
slackness Check slackness and adjust if
needed
Damaged bearings Replace bearings
Noise in axle hubs
Damaged hubs 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 conduits or
connections. Check system for
tightness.
Incorrect main or parking
brake adjustment Regulate setting of expander arms
or tension of parking brake cable
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 hydraulic pump
output, hydraulic pump is
damaged
Check hydraulic pump
Incorrect hydraulic
system operation
Damaged or contaminated
cylinder
Check cylinder rod (bending,
corrosion), check cylinder for
tightness (cylinder rod seal), if
necessary, repair or replace the
cylinder