Toro Groundmaster Series Service Manual page 52

General Hydraulic System Problems (continued)
Problem
The hydraulic system operates hot
(exceeds 95° C (203° F).
Troubleshooting: General Hydraulic System Problems
Possible Cause
The traction system pressure is high
due to load or dragging brakes.
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 hydraulic fluid cooler is damaged
or plugged.
The fluid cooler air flow is obstructed.
The traction pump bypass valve is open
or damaged.
The charge pressure is low (steering
and lift circuit performance is also
affected).
The traction pump is worn or damaged.
The wheel 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 3–16
Corrective Action
Inspect brake operation and service or
adjust if necessary.
Adjust the hydraulic fluid level.
Secure, clean or replace the suction
filter or suction line.
Replace the hydraulic fluid.
Repair or replace the hydraulic fluid
cooler.
Verify cooling fan operation and remove
debris from in and around the fluid
cooler.
Close or replace the traction pump
bypass valve.
Verify charge pressure; refer to Testing
the Traction Circuit – Charge Pressure
in the Hydraulic System chapter of this
manual.
Verify traction pump operation; refer
to Testing the Traction Circuit – Piston
(traction) Pump (P1) Flow and Relief
Pressure Test in the Hydraulic System
chapter of this manual.
Verify wheel motor operation; refer to
Testing the Traction Circuit – Wheel
Motor Efficiency in the Hydraulic
System chapter of this manual.
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A