General Hydraulic System Problems (Greenspro 1260) - Toro GreensPro 1240 Service Manual

General Hydraulic System Problems (GreensPro
1260)
Problem
Hydraulic fluid is leaking from the
system.
The hydraulic fluid foams excessively
causing fluid leakage from the hydraulic
tank breather.
The hydraulic system operates hot
(exceeds 95° C (203° F).
GreensPro ™ 1240/1260
14211SL Rev A
Possible Cause
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.
Note: Refer to the traction unit
Operator's Manual for hydraulic fluid
specifications.
The incompatible hydraulic fluids are
mixed in the system.
There is water in the hydraulic system.
The pump suction line has an air leak.
The hydraulic fluid level in the hydraulic
tank is low.
The suction filter or suction line is
damaged, loose, or clogged.
The hydraulic fluid is contaminated or
the fluid viscosity is too light.
Note: Refer to the traction unit
Operator's Manual for hydraulic fluid
specifications.
The engine RPM is too low.
The traction pump tow (bypass) valve
is open or damaged.
The charge pressure is low.
The hydraulic pump is worn or
damaged.
The hydraulic drive motor 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 3–5
Corrective Action
Secure or replace loose or damaged
hydraulic connections.
Install a new O-ring(s) or seal(s).
Adjust the hydraulic fluid level.
Replace the hydraulic fluid.
Replace the hydraulic fluid.
Replace the hydraulic fluid.
Replace the pump suction line.
Adjust the hydraulic fluid level.
Secure, clean or replace the suction
filter or suction line.
Replace the hydraulic fluid.
Verify engine RPM and adjust if
necessary.
Close or replace the traction pump
bypass valve.
Verify charge pressure; refer to
Hydraulic Pump Charge Pressure Test
in Chapter 5 – Hydraulic System.
Verify hydraulic pump operation; refer
to Hydraulic Pump Flow and Relief
Pressure Test in Chapter 5 – Hydraulic
System.
Repair or replace the hydraulic drive
motor.
Troubleshooting: General Hydraulic System
Problems (GreensPro 1260)