PRONAR T683, Operator'S Manual

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Pronar T683 SECTION 5
5.42
FAULT CAUSE REMEDY
brake force regulator
Excessive bearing slackness Check slackness and adjust 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 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
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 (bending,
corrosion), check cylinder for tightness
(piston seal), in case of need repair or
replace cylinder.
Excessive cylinder loading
Check mechanism controlled by cylinder
for mechanical damage
Incorrect
hydraulic system
operation
Damaged hydraulic conduits
Check and ascertain that hydraulic
conduits are tight, not fractured and
properly tightened. If necessary, replace
or tighten.