Komatsu PC500LC-10R Shop Manual page 299

10 STRUCTURE AND FUNCTION COMPONENT PARTS OF WORK EQUIPMENT SYSTEM
L.H. work equipment control lever
P: From self-pressure reducing valve
P1: To control valve (arm OUT port)
P2: To control valve (arm IN port)
P3: To control valve (swing LEFT port)
P4: To control valve (swing RIGHT port)
T: To hydraulic tank
R.H. work equipment control lever
P: From self-pressure reducing valve
P1: To control valve (boom LOWER port)
P2: To control valve (boom RAISE port)
P3: To control valve (bucket CURL port)
P4: To control valve (bucket DUMP port)
T: To hydraulic tank
PC500LC-10R 10-205