An anti-cavitation plate actuating system incorporates pressurized air
selectively applied through a control valve to an air assist cylinder.
The cylinder, when pressurized, applies force to anti-cavitation plate
return springs; the force is not sufficient to expand or retract the
springs but merely to apply a pre-load. A control pedal operating through
a control shaft applies additional force through an actuating shaft
connected through a control lever to the anti-cavitation plate to lower
the plate.