23
OPERATOR'S MANUAL
HYDRAULIC FRONT-LOADER EXTENSION
ARM
FISHER
7.
MAINTENANCE AND SERVICE
Tab. 2.
Torque values for bolts
8.
MALFUNCTIONS AND THEIR REPAIRS
In the event of a malfunction, immediately stop the machine and after the cutting assembly has
come to a complete stop, turn off the engine. Before disconnecting any of the hydraulic hoses, check
whether there is no pressure in the hydraulics and remember to cut-off the oil feed from the tan to the
machine's hydraulics. Hot or/and pressurized oil leak may cause serious bodily injuries. For the
machine's operator safety, stop the machine on an even ground. All hydraulic cylinders and moving
elements must be completely locked.
Defect
Reason
Repair
Shift cylinder cannot be
operated.
Hydraulic connectors are not
connected to one pair of feed
connectors.
Connect hydraulic connectors correctly.
Hydraulic connectors are not
compatible with hydraulic
connectors on the vehicle.
Replace the connectors for correct ones.
Closed choke valve on the cylinder
(speed adjustment).
Adjust choke valve.
Rotation cylinder cannot
be operated, although
extension cylinder works
correctly.
Control panel not connected.
Check if after the controller activation the
LED indicators are lit, check lighter outlet
and 3-pin plug at the machine. Make sure
that electric cables are not cut.
Damaged solenoid.
Check if coil on the valve operates correctly.
Otherwise, replace the coil.
Replace the solenoid.
Vibrations and noises
when extending the arm.
No lubrication.
Lubricate the slides in suspension frame.
Rotary arm is lifting too
often.
Damaged safety breakaway
device.
Replace safety breakaway device if force
applied to the head, at which the arm is
lifted is less than 8000N.
