CAS PROBABLE CAUSE CHECKS - REMEDIES
Calibration of pressure
relief valves too low (or
impurity on the valve
seat)
Increase pressure to the
recommended value or clean unit
Motor is worn out or
deteriorated, too much
internal play
Check the oil flow on the drainage. If
the flow is too high, change the
motor, clean the hydraulic circuit,
change the filters
Check the increase in pressure on
the pump or change the pump if
necessary
4 Filter clogged Check the filter, change if necessary
Type of oil is not suitable
for the trimmer (too liquid
at hig temperature)
Check the oil and change if
necessary for a suitable type
6 Motor or pump worn out See cases 2 or 3
Calibration of pressure
relief valves too low
Increase pressure to the
recommended value or clean
Oil not suitable (viscosity
too high at low
temperature)
Check the oil and change if
necessary for a suitable type
Change to a higher capacity relative
to the flow of the pump
Compare the maximum oil flow of
the pump of the tractor with the
maximum oil flow acceptable by the
machine. Contact your dealer for
more informations.
Type of oil is not suitable
(viscosity too high)
The oil is being reduced
inside pressure relief
valve
Regulate pressure in the pressure
relief valve to the recommended
level
Clogging of the filter
element
Note : The interventions on the hydraulic system must be done by approved techniciens,
except for the change of the cartridge filter.
PROBLEMS WHICH MAY OCCUR AFTER SWITCHING ON THE UNIT
The blades rotate too
slowly, in spite of a good
output control but speed
increases proportionally
at the temperature
The blades rotate normally
at cold temperature, but
slow down when the
temperature is stabilized
The blades rotate too
slowly, even though the
oil flow corresponds to
recommendations and
even after several
minutes of operation
The temperature
of the circuit is
too high ( > 70°C )
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