5-Spool Control Valve - Komatsu Galeo PC800-8 Shop Manual

SEN00384-02
L.H. 5-Spool control valve
P : From front pump
T : To tank (Main drain)
A1 : To boom cylinder bottom
A2 : To swing motor port MA (Swing RIGHT)
A3 : To arm cylinder bottom
A4 : To bucket cylinder bottom
A5 : To travel motor (Left travel port P2)
B1 : Plug
B2 : To swing motor (Port MB)
B3 : To arm cylinder head
B4 : Plug (Standard machine)
B5 : To travel motor (Left travel port P1)
P1 : Valve (From straight travel valve port P2 of right 4-spool valve)
PP : From straight travel changeover solenoid valve
TC : Drain
PA1 : From PPC valve (Boom LOWER)
PA2 : From PPC valve (Swing LEFT)
PA3 : From PPC valve (Arm OUT)
PA4 : Standard; Bucket DUMP PPC valve or drain
Optional: Optional PPC valve (via shuttle valve)
PA5 : From PPC valve (Left travel FORWARD)
PB1 : From PPC valve (Boom RAISE)
PB2 : From PPC valve (Swing RIGHT)
PB3 : From PPC valve (Arm IN)
PB4 : From PPC valve (Bucket CURL)
PB5 : From PPC valve (Left travel REVERSE)
PC1 : From pilot valve (Port A2)
PC2 : From pilot valve (Port A1)
NCA : J/S upstream pressure pick-up port
NCB : J/S downstream pressure pick-up port
8
10 Structure, function and maintenance standard
PC800, 850-8