PRONAR T743, Operator'S Manual

Page: 145 / 150

Pronar T743 SECTION 5
5.46
FAULT CAUSE REMEDY
Improper hydraulic oil
viscosity
Check oil quality, make sure that
the oil in both machines is at the
same type. If necessary change
oil in tractor or in trailer.
Insufficient tractor hydraulic
pump output, tractor
hydraulic pump is damaged.
Check tractor hydraulic pump.
Damaged or contaminated
ram cylinder
Check cylinder ram piston
(bending, corrosion), check ram
cylinder for tightness (piston seal),
in case of need repair or replace
ram cylinder.
Excessive cylinder ram
loading
Check mechanism controlled by
ram 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.
Jerking, uneven trailer
braking.
Damaged or unconnected
brake system supply
conduit Check conduit, check connection
socket. Repair, change or connect
conduit.
Worn out abrasive ring Install a new abrasive ring
Grease on abrasive surface
Grease contaminated surface of
steel or cast iron may be washed
with benzene or acetone.
Change abrasive ring.
Hydraulic clutch does not
transfer required torque.
Insufficient working
pressure Check pressure and set at
required value.
Springs slips because oil
pressure is too low Check pressure and set at
required value.
Clutch heats to over
120°C
when connected
Worn out abrasive ring Install a new abrasive ring.
Clutch heats when
disconnected
Cone shield resting on pin
Restore slow rotation to cone
shield on pins.