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Greensmaster 3320/3420Hydraulic System Page 5 -- 24
Troubleshooting
The charts that follow contain information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
Refer to the Testing section of this Chapter f or precau-
tions and specific test procedures.
General Hydraulic System Problems
Problem Possible Cause
Hydraulic oil leaks from system. Fitting(s), hose(s) or tube(s) are loose or damaged.
O--ring(s) or seal(s) are missing or damaged.
Hydraulic fluid foams. Oil level in reservoir is low.
Hydraulic system has wrong type of oil.
The gear pump suction line has an air leak.
Hydraulic system operates hot. 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).