Toro Groundsmaster 3400 Operator's Manual page 49

Problem
There is excessive noise in the hydraulic
system.
After initial operation, the machine loses
power.
Cutting unit fails to lift out of work.
Cutting unit does not follow ground
contours.
Possible Cause
1. There is a faulty pump.
2. There is a faulty motor.
3. There is air leaking into the system.
4. The suction strainer is blocked or
damaged.
5. There is excessive oil viscosity due to
cold conditions.
6. The relief-valve setting is low.
7. The hydraulic-fluid level is low.
1. There is a worn pump or motor.
2. The hydraulic-oil level is low.
3. The hydraulic-oil viscosity is incorrect.
4. The oil-filter element is blocked.
5. The pressure relief valve does not
function.
6. There is overheating.
7. There are leaks in the suction hose.
1. Lift cylinder seal failure.
2. Pressure-relief valve is jammed open
or wrongly set.
3. The control valve is not functioning.
4. There is a mechanical blockage.
1. There is tightness in the pivots.
2. Mower operated in the Hold position.
3. The weight transfer set too high.
49
Corrective Action
1. Identify the noisy pump and service or
replace.
2. Identify the noisy motor and service or
replace.
3. Tighten or replace hydraulic fittings,
particularly in suction lines.
4. Clean and replace the suction strainer.
5. Allow the system to warm up.
6. Have the relief valve cleaned and
pressure checked. Contact an
Authorized Service Dealer.
7. Fill the hydraulic-fliud reservoir to the
correct level.
1. Replace as the pump or motor.
2. Fill the hydraulic-fluid reservoir to the
correct level.
3. Replace the oil in hydraulic tank with
correct viscosity of oil.
4. Change the filter element.
5. Have the relief valve cleaned and
pressure checked. Consult your
authorized dealer.
6. Reduce the work rate, i.e., increase the
height of cut or reduce your forward
speed.
7. Check and tighten fittings. Replace
hose if necessary.
1. Replace seals.
2. Have relief valve cleaned and pressure
checked. Consult your authorized
dealer.
3. Overhaul the control valve.
4. Remove the blockage.
1. Release and grease the pivots as
needed.
2. Move position-control switch to 'Down
/ Float' position.
3. Reduce the weight transfer.