33 - 3
Auxiliary (OPT) Operation
When pilot pressure is applied to port bl1 by operating the
Auxiliary Pedal, the spool E moves to the right, closing off
neutral gallery F. Oil from the pump is directed to outlet port
BL2, by lifting check valve G. At the same time, because
neutral gallery F is closed, the foot release valve H closes
and stops signal pressure FL to the pump controller,
enabling the pump to deliver maximum flow.
When pilot pressure is applied to port al1 the reverse
operation occurs.
Section E Hydraulics
9803/6410
Section E
33 - 3
Issue 1
Control Valve
JS01710
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