Toro LT3340 Operator's Manual page 53

Problem
One cylinder rotates slowly.
A cutterhead fails to lift out of work.
The cutterheads do not follow the contours
of the ground.
The cutterheads fail to start up when
lowered into work.
The cylinders rotate in the wrong direction.
Possible Cause
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.
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 mower is being operated in the
'hold' position.
4. The weight transfer is set too high.
1. The seat sensor switch is
malfunctioning.
2. The hydraulic-oil level is low.
3. A driveshaft is sheared.
4. The pressure relief valve is jammed
open or wrongly set.
5. A cutting cylinder is jammed.
6. A cutting cylinder is tight on the bottom
blade.
7. A cutterhead control valve is in the
'off' position, caused by malfunctioning
control valve.
8. A cutterhead control valve is in the 'off'
position, caused by an electrical fault.
9. The lift arm proximity switch is
incorrectly set.
1. The hoses are connected wrongly.
2. The cutterhead drive switch is
connected wrongly.
53
Corrective Action
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.
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 cutterheads 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.
1. Check the mechanical and electrical
operation of the switch.
2. Fill the hydraulic-oil reservoir to the
correct level.
3. Check the motor and cylinder
driveshafts and replace them if
necessary.
4. Have the relief valve pressure checked.
Consult your authorized dealer.
5. Clear any jams as necessary.
6. Adjust the setting.
7. Overhaul the control valve.
8. Have the electrical system checked for
an electrical fault.
9. Check and adjust the proximity switch.
1. Check the hydraulic circuit and connect
the hoses correctly.
2. Check the electrical connections of the
switch.