Toro ProLine H800 Service Manual page 91

Raising the Height Of Cut
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ProLine H800
19241SL Rev A
When the height of cut switch is moved to the RAISE position, the solenoid valve
inside the control valve is energized to cause the valve to shift, allowing fluid flow
from the P port to the A port. This extends the piston, causing the height of cut to
raise. The fluid displaced from the rod end of the height of cut cylinder is routed
to the T port. The block valve (located between the height of cut control valve
and the cylinder) holds the fluid pressure in the height of cut cylinder to maintain
the correct level of cut until the next adjustment.
Figure 35
Page 5–23 Hydraulic System: Hydraulic Flow Diagrams