Troubleshooting; General Hydraulic System Problems - Toro Greensmaster 3120 Service Manual

Troubleshooting

General Hydraulic System Problems

The hydraulic fluid is leaking from the system.
The hydraulic fluid foams excessively causing fluid leakage
from the hydraulic tank breather.
Note: Some aeration of the hydraulic fluid on this machine
is normal.
The hydraulic system operates hot.
Hydraulic System: Troubleshooting
The following chart contains information to troubleshoot hydraulic circuit
problems. There can be more than one cause for a machine malfunction.
Refer to Testing the Hydraulic System (page 4–35)
procedures.
Problem
The fitting(s), hose(s), or tube(s) are loose or damaged.
The O-ring(s) or seal(s) are missing or damaged.
The hydraulic-fluid level in the hydraulic tank is low.
The hydraulic system has a wrong type of fluid.
One of the pump suction lines has an air leak.
The incompatible hydraulic fluids are mixed in the system.
There is water in the hydraulic system.
The hydraulic-fluid level in the hydraulic tank is low.
The suction filter is loose or clogged.
The hydraulic fluid is contaminated or the fluid viscosity is
too light.
Brakes are applied or are incorrectly adjusted.
The fluid cooler (if equipped) is damaged or plugged. The
fluid cooler air flow is obstructed.
Working load of machine (ie: high ambient temperatures, use
of verticutter) may require use of fluid cooler.
The traction pump bypass valve is open or damaged.
The charge pressure is low; refer to Charge Pressure Relief
Valve Pressure Test in the Testing section of this chapter.
The traction pump, wheel motor(s) or reel motor(s) is worn
or damaged.
Note: If a traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
Page 4–30
for specific hydraulic test
Possible Causes
Greensmaster 3120
17230SL Rev C