Troubleshooting; Troubleshooting; General Hydraulic System Problems - Toro Greensmaster TriFlex 3320/3420 Service Manual

Troubleshooting

The charts that follow contain information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.

General Hydraulic System Problems

Problem
Hydraulic oil leaks from system.
Hydraulic fluid foams.
Hydraulic system operates hot.
Hydraulic System
Refer to the Testing section of this Chapter for precau-
tions and specific test procedures.
Possible Cause
Fitting(s), hose(s) or tube(s) are loose or damaged.
O--ring(s) or seal(s) are missing or damaged.
Oil level in reservoir is low.
Hydraulic system has wrong type of oil.
The gear pump suction line has an air leak.
Oil level in reservoir is low.
Oil is contaminated or too light.
Parking brake is applied or incorrectly adjusted.
Piston pump by--pass valve is open or defective.
Charge pressure is low (see Charge Relief Valve Pressure Test in
the Testing section of this chapter).
Wheel motor(s) is worn or damaged (see Wheel Motor Efficiency
Test in the Testing section of this chapter).
Piston pump is worn or damaged (see Piston (Traction) Pump Flow
Test in the Testing section of this chapter).
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