Toro T4240 Operator's Manual page 49

Problem
After an initial period of satisfactory
operation, the machine loses power.
A cylinder knocks while rotating.
One cylinder rotates slowly.
A cutting unit fails to lift out of work.
The cutting units do not follow the contours
of the ground.
Possible Cause
1. A pump or motor is worn.
2. The hydraulic oil level is low.
3. The oil in the hydraulic system has the
wrong viscosity.
4. The oil-filter element is blocked.
5. The pressure relief valve is
malfunctioning.
6. The system is overheating.
7. There are leaks on the suction hose.
1. There is a high spot on the cylinder or
the bottom blade due to contact with a
foreign object.
2. The cylinder bearings are worn.
1. A cutting cylinder bearing is seized.
2. A motor with incorrect rotation was
installed.
3. The motor integral check valve is
jammed open.
4. The cutting cylinder is tight on the
bottom blade.
5. The motor is worn.
6. The diverter valve is only partly open.
1. There is a lift cylinder seal failure.
2. The pressure relief valve is jammed
open or wrongly set.
3. There is a malfunctioning control valve.
4. There is mechanical blockage.
1. The hose routing or the orientation of
the hydraulic fittings is incorrect.
2. The pivot points are too tight.
3. The machine is being operated in the
'hold' position.
4. The weight transfer is set too high.
49
Corrective Action
1. Replace parts as necessary.
2. Fill hydraulic oil tank to correct level
3. Replace the oil in the hydraulic tank
with the correct viscosity-grade oil;
refer to the Specifications section.
4. Change the filter element.
5. Have the relief valve cleaned and
pressure checked. Consult your
authorized distributor.
6. Check the cylinder-to-bottom-blade
adjustment. Reduce the work rate
(increase the height of cut or reduce
the forward speed).
7. Check and tighten the fittings. Replace
the hose if necessary.
1. Remove the high spot with a stone and
back lap to restore the cutting edges.
Severe damage will require grinding.
2. Replace the bearings as necessary.
1. Replace the bearings as necessary.
2. Check the motor and replace it if
necessary.
3. Have the check valve cleaned and
checked.
4. Adjust the setting.
5. Replace the motor.
6. Free off and lubricate or replace the
diverter valve as necessary.
1. Replace the seals.
2. Have the relief valve pressure checked.
Consult your authorized distributor.
3. Overhaul the control valve.
4. Remove the blockage.
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. Release and grease the pivot point as
necessary.
3. Move the position control switch to
'down / float' position.
4. Reduce the weight transfer.