Raising The Cutting Unit - Toro Groundsmaster 300 Series Service Manual

The charge pump supplies oil through the "AUX" port of the steering valve to the lift valve.
When the lift lever is actuated to raise the cutting unit, oil supplied by the charge pump is
directed out the work port of the lift valve to the barrel end of the lift cylinder. Oil displaced
from the rod end of the cylinders goes through the oil cooler and back to reservoir.
NOTE: The steering valve will not allow oil to flow through it to the lift valve when the steering
wheel is being turned. Whenever the steering wheel is not moving, the steering valve allows
oil to f ow through it. O in the rest of the steer l
Hydraulic Flow Diagrams

Raising the Cutting Unit

il
Pressure
Return
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ing ci rcuit is then trapped.
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Groundsmaster 300 Series