Toro Groundmaster Series Service Manual page 145

Filtering the Closed-loop Traction Circuit (continued)
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
6. Fill the hydraulic tank with the correct type and quantity of new hydraulic
fluid; refer to the traction unit Operator's Manual.
7. Start engine and run at low idle speed. Check for and correct any hydraulic
leaks before proceeding.
Use extreme caution when performing this test. The traction unit
wheels will be rotating during the test.
While engaging the traction circuit, monitor the indicator on the
high flow hydraulic filter. If the indicator shows red, either reduce
the pressure on the traction pedal or reduce the engine speed to
decrease the hydraulic flow through the filter.
8. With the engine running at low-idle speed, slowly move the traction pedal
to the reverse direction for a traction (piston) pump failure, or to the forward
direction for a wheel motor failure to allow flow through the traction circuit and
high-flow filter. Keep the traction circuit engaged for 5 minutes while gradually
increasing the traction pedal pressure and the engine speed. Monitor the
filter indicator to ensure that the green color is showing during the operation.
If you are using a filter that is not the Toro high flow filter that
is bi-directional, do not press the traction pedal in the opposite
direction. If the flow is reversed when using a filter that is not
bi-directional, unwanted material from the filter will again enter the
traction circuit.
9. When using a high flow bi-directional filter, alternately move the traction
pedal in opposite directions with the engine running at high-idle speed. While
monitoring the filter indicator, continue this process for 5 more minutes.
10. Shut off the engine and remove the key from the key switch.
11. Remove the high flow hydraulic filter and hydraulic hose kit from the machine.
Flush clean and install the hydraulic tube preciously removed, or connect the
disconnected hydraulic hose. Ensure that you properly tighten the hydraulic
tube or hose; refer to
Seal Fitting) (page
12. Lower the machine to the ground.
13. Check the hydraulic fluid level in the tank and adjust if necessary; refer to
the traction unit Operator's Manual.
14. Operate the machine and check for leaks before returning the machine to
service.
CAUTION
IMPORTANT
IMPORTANT
Installing Hydraulic Hoses and Tubes (O-Ring Face
5–7).
Page 5–59 Hydraulic System: Service and Repairs