Toro Groundsmaster 4500-D Series Service Manual page 196

Filtering Closed−Loop Traction Circuit (continued)
Hydraulic System: Service and Repairs
All wheels will be off the ground and rotating during this procedure.
Make sure machine is well supported so it will not move and
accidentally fall to prevent injuring anyone around machine.
While engaging the traction circuit, monitor the high flow hydraulic
filter indicator. If the indicator should show red, either reduce
traction pedal setting or reduce engine speed to decrease hydraulic
flow through the filter.
7. With engine running at low idle speed, slowly move the traction pedal to the
forward direction to allow flow through the traction circuit and high flow filter.
Keep traction circuit engaged for five (5) minutes while gradually increasing
both forward pressure on traction pedal and engine speed. Monitor filter
indicator to make sure that green color is showing during operation.
8. With engine running at high idle speed and traction pedal moved to the
forward direction, periodically apply brakes to increase pressure in traction
circuit. While monitoring filter indicator, continue this process for an additional
five (5) minutes.
If using a filter that is not the bi−directional Toro high flow filter,
do not press the traction pedal in the reverse direction. If flow is
reversed when using a filter that is not bi−directional, debris from
the filter will re−enter the traction circuit.
9. With engine running at high idle speed, alternately move traction pedal from
forward to reverse. While monitoring filter indicator, continue this process for
an additional five (5) minutes.
10. Shut engine off and remove key from ignition switch.
11. Remove high flow hydraulic filter and hydraulic hose kit from machine.
Connect hydraulic hose to right side piston (traction) pump fitting. Make sure
to properly tighten hose (see
Face Seal) (page 5–7)).
12. Lower machine to ground.
13. Check oil level in hydraulic reservoir and add correct oil if necessary.
CAUTION
IMPORTANT
IMPORTANT
Installing Hydraulic Hoses and Tubes (O-Ring
Page 5–94 Groundsmaster ® 4500-D/4700-D
19245SL Rev A