Toro 02750 Operator's Manual page 49

Problem
The hydraulic oil system is overheating.
The brake system does not operate
correctly.
There is a lack of steering.
There is no machine movement in forward
or reverse.
The machine creeps forward or backward
in neutral.
The work/transport modes are
non-operational.
There is excessive noise in the hydraulic
system.
Possible Cause
1. There is a blocked screen.
2. The oil cooler fins are dirty/blocked.
3. The engine radiator is dirty/blocked.
4. The relief valve setting is low.
5. The oil level is low.
6. The brakes are engaged.
7. The cutting cylinders tight on the
bottom blades.
8. There is a malfunctioning fan or fan
drive.
1. There is a malfunctioning wheel motor
brake assembly.
2. The brake discs are worn.
1. The steering valve is malfunctioning.
2. A hydraulic cylinder is malfunctioning.
3. A steering hose is damaged.
1. The parking brake is engaged.
2. The oil level is low.
3. The reservoir has the wrong kind of oil.
4. The drive pedal linkage is damaged.
5. The transmission pump is damaged.
6. The transmission bypass valve is open.
7. There is a broken drive coupling.
8. The transmission filter is blocked.
1. The transmission neutral adjustment is
set incorrectly.
1. The control switch is damaged.
2. The solenoid valve is damaged.
3. The wiring is damaged/worn.
1. A pump is malfunctioning.
2. A motor is malfunctioning.
3. Air is leaking into the system.
4. A suction strainer is blocked or
damaged.
5. The oil has excessive viscosity due to
cold conditions.
6. The relief valve setting is low.
7. The hydraulic oil level is low.
49
Corrective Action
1. Clean the screen.
2. Clean the fins.
3. Clean the radiator.
4. Have the relief valve pressure checked.
Consult your authorized distributor.
5. Fill the reservoir to the correct level.
6. Disengage the brakes.
7. Adjust the settings.
8. Check the fan operation and service
it as required.
1. Consult your authorized distributor.
2. Replace the brake discs; consult your
authorized distributor.
1. Service or replace the steering valve.
2. Service or replace the hydraulic
cylinder.
3. Replace the hose.
1. Release the parking brake.
2. Fill the reservoir to the correct level.
3. Drain the reservoir and fill it with the
correct oil.
4. Check the linkage and replace any
damaged or worn parts.
5. Have the transmission pump
overhauled by your authorized
distributor.
6. Close the bypass valve.
7. Replace the drive coupling.
8. Replace the transmission filter.
1. Adjust the transmission neutral linkage
setting.
1. Check the switch and replace if
necessary.
2. Service or replace the solenoid valve.
3. Check the wiring/connections.
1. Identify the noisy pump and service or
replace it.
2. Identify the noisy motor and service or
replace it.
3. Tighten or replace the hydraulic fittings,
particularly in the suction lines.
4. Clean and replace the suction strainer
or renew it as necessary.
5. Allow the system to warm up.
6. Have the relief valve pressure checked.
Consult your authorized distributor.
7. Fill the hydraulic oil reservoir to the
correct level.