hitachi — OPERATION

COMPONENT OPERATION / Pilot Valve Full Stroke (Output Curve: E to F) 1. When the control lever is fully stroked, pusher (2) is moved downward until cam (1) comes in con- tact with the casing. 2. At this time, the bottom surface of pusher (2) di- rectly pushes spool (7). Therefore, even if pres- sure in the output port increases further, the hole on spool (7) is kept open. 3. Consequently, pressure in the output port is equal to that in port P. F E D Pilot Pressure C B A Pusher Stroke T523-02-05-001 T3-4-12