Problem
Possible Cause
Corrective Action
1. A pump is malfunctioning.
1. Identify the noisy pump and service or
replace it.
2. A motor is malfunctioning.
2. Identify the noisy motor and service or
replace it.
3. Air is leaking into the system.
3. Tighten or replace the hydraulic fittings,
particularly in the suction lines.
4. A suction strainer is blocked or
damaged.
4. Clean and replace the suction strainer
or renew it as necessary.
5. The oil has excessive viscosity due to
cold conditions.
5. Allow the system to warm up.
6. The relief valve setting is low.
6. Have the relief valve pressure checked.
Consult your authorized distributor.
There is excessive noise in the hydraulic
system.
7. The hydraulic-fluid level is low.
7. Fill the hydraulic-fluid reservoir to the
correct level.
1. A pump or motor is worn.
1. Replace parts as necessary.
2. The hydraulic-fluid level is low.
2. Fill hydraulicfluid tank to correct level.
3. The oil in the hydraulic system has the
wrong viscosity.
3. Replace the oil in the hydraulic tank
with the correct viscosity-grade oil;
refer to the Specifications section.
4. The oil-filter element is blocked.
4. Change the filter element.
5. The pressure relief valve is
malfunctioning.
5. Have the relief valve cleaned and
pressure checked. Consult your
authorized distributor.
6. The system is overheating.
6. Reduce the work rate (increase the
height of cut or reduce the forward
speed).
After an initial period of satisfactory
operation, the machine loses power.
7. There are leaks on the suction hose.
7. Check and tighten the fittings. Replace
the hose if necessary.
A flail rotor ‘knocks’ while rotating.
1. The flail-rotor bearings are worn.
1. Replace the bearings as necessary.
1. A flail-rotor bearing is seized.
1. Replace the bearings as necessary.
2. A motor with incorrect rotation was
installed.
2. Check the motor and replace it if
necessary.
3. The motor integral valves are not
working correctly.
3. Have the valves cleaned and checked.
One flail rotor rotates slowly.
4. The motor is worn.
4. Replace the motor.
1. There is a lift cylinder seal failure.
1. Replace the seals.
2. The pressure relief valve is jammed
open or set wrong.
2. Have the relief valve pressure checked.
Consult your authorized distributor.
3. There is a malfunctioning control valve.
3. Overhaul the control valve.
A cutting unit fails to lift out of work.
4. There is mechanical blockage.
4. Remove the blockage.
1. The hose routing or the orientation of
the hydraulic fittings is incorrect.
1. Move the cutting units throughout the
extremes of movement and observe
any tightness in the hoses. Correctly
route the hoses and orientate the
fittings as necessary.
2. The pivot points are too tight.
2. Release and grease the pivot point as
necessary.
3. The mower is being operated in the
‘hold’ position.
3. Move the position-control switch to
‘down / float’ position.
The cutting units do not follow the contours
of the ground.
4. The weight transfer is set too high.
4. Reduce the weight transfer.
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