FERRI T250A Series Use And Maintenance Manual page 122

TROUBLE SHOOTING
PROBLEMS
Hydraulic oil
overheating
(over 80°C)
Excessive backlash in
the arms and joints
Flail-holder rotor
speed is lower than
expected
The flail head shifts
backward during
working
Arm lower
involuntarily
Excessive stiffness of
the arm during work
Belts overheating
122
PROBABLE CAUSE
Excessive material to chop
Hydraulic system requires checking
Malfunctioning heat exchanger
Excessive rotor rpm
Worn pins or bushes
Loose belts
Incorrect max. pressure valve setting
Leakage of oil from hydraulic ram
Advance speed excessive for the
type of working being performed
Excessive oil leakage from the
hydraulic ram; oil seals worn-out
inside the hydraulic ram
Incorrect max. pressure valve setting
Belt slipping.
Excessive belt tension
Working speed not suitable to the
quantity of material to chop
Flails touching the ground
T250A-T320A
REMEDIES
Reduce advance speed
Get an authorised FERRI workshop to check the
state of the filter, the hydraulic pipes, the setting
of the valves etc.
Check the electric system for the heat exchanger
and thermostat
Check the tractor PTO rpm and reduce it as
prescribed for the machine in use
Replace
Restore right belt tightness
Have valve pressure setting checked at
authorised Ferri workshops
Check the hydraulic ram oil seals and sealing in
general and have repairs or replacements made
at authorised Ferri workshops
Reduce advanced speed
Check the hydraulic ram oil seals and sealing in
general and have repairs or replacements made
at authorised Ferri workshops
Have valve pressure setting checked at
authorised Ferri workshops
Check the pre-tension of the belts
Reduce work speed
Adjust height of cut
Rev. 1.1