Troubleshooting; Troubleshooting; General Hydraulic System Problems - Toro 04384 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.
Greensmaster 3250--D
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.
Pump suction line has an air leak.
Oil level in reservoir is low.
Suction screen in reservoir is loose or clogged.
Oil is contaminated or too light.
Brakes are binding or are incorrectly adjusted.
Piston pump by--pass valve is open or defective.
Oil cooler (if installed) is damaged or plugged. By--pass relief is
stuck open or air flow is obstructed.
Working load of machine (e.g. high ambient temperatures, use of
verticutter) may require use of oil cooler.
Charge pressure is low (see Charge Pressure Relief Valve Pres-
sure Test).
Wheel motor(s) or reel motor(s) are worn or damaged (see Wheel
Motor Efficiency and Reel Motor Case Drain Flow Tests).
Piston (traction) pump is worn or damaged (see Piston (Traction)
Pump Flow Test).
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