3 - 24
Attachment - Boom Down
Pressurised oil from port A2 (rear pump) enters port 4P
of the control valve.
When operating boom down with the right hand joystick,
the pilot pressurised oil enters port 4Pa3 of the control
valve and switches boom spool (1) and pressurised oil
of port 4P flows to the boom ram.
Pressurised oil enters port PLc1 of the control valve and
releases the load holding valve. When the load holding
valve is released, the return oil from the boom ram flows
to the tank and boom down movement is executed.
Section E Hydraulics
9803/6020
Section E
3 - 24
Issue 1
Schematics
To Next Page
Loading...
