Toro Spray Master Series Operator's Manual page 81

Problem
The engine overheats.
The machine pulls to the left or the right
(with steering control fully forward).
The machine does not drive.
The machine vibrates abnormally.
Troubleshooting the Spreader or Sprayer
Problem
The spreader or sprayer pattern is uneven.
The impeller does not rotate.
No material dispensed from hopper.
Possible Cause
1. The engine load is excessive.
2. The oil level in the engine is low.
3. The cooling fins and air passages for
the engine are plugged with dirt or
debris.
1. The air pressure in the tires is not
correct.
2. The motion-control linkage is damaged.
3. The front wheel axles are bent or
damaged.
4. The motion control tracking is out of
adjustment.
1. The drive release valves are not fully
closed.
2. The belt is loose or broken.
1. The engine-mounting bolts are loose.
Possible Cause
1. The impeller is dirty or damaged.
2. The diffuser control is not adjusted
properly.
3. The sprayer nozzles are clogged.
4. The hopper screen is plugged.
5. Material in the hopper is clumped over
the gate.
6. The diffuser ramp setting is incorrect.
1. There is debris buildup at the impeller.
2. The hopper screen is plugged.
3. The impeller motor is loose or
damaged.
4. The motor hydraulics are damaged.
5. The Impeller-speed control is in the
O position or set too slow.
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6. The impeller-drive pin is missing.
7. The bearings failed in the impeller
motor.
1. Hopper screen is plugged.
2. Hopper door not adjusted properly.
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Corrective Action
1. Reduce the ground speed of the
machine.
2. Add oil into the engine to the proper
oil level.
3. Clean the cooling fins and the air
passages.
1. Adjust air pressure in the drive tires.
2. Replace motion-control linkage.
3. Repair or replace the front wheel axles.
4. Adjust the motion control tracking.
1. Close the drive release valves.
2. Tension the belt or replace it.
1. Tighten the engine-mounting bolts.
Corrective Action
1. Clean, repair, or replace the impeller.
2. Adjust the diffuser control; refer to
the Adjusting the Diffuser Control
procedure.
3. Clean or replace the nozzles.
4. Clean the hopper screen.
5. Check to see if the agitator pin for the
shaft of the impeller motor is present.
6. Adjust the position of the control cable.
1. Clean the impeller.
2. Clean the hopper screen.
3. Repair or replace the impeller motor.
4. Check the hydraulic hoses and
connections.
5. Set the Impeller-speed control O
position and adjust the impeller speed.
6. Replace the drive pin.
7. Replace the bearings in the motor or
the motor assembly.
1. Clean the hopper screen.
2. Adjust the hopper door; refer to the
Adjusting the Hopper-Door Control
procedure.
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