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10.Engine Information Screen
from Sumitomo SH350LC-5 SH350HD-5 SH370HD-5 Hydraulic Excavator Service Text Manual WLST3505-01T - PDF
Other Circuits
Cushion circuit (arm-out operation stopped)
When the remote control valve arm-out operation is returned to neutral, the oil pushed out from the control valve pa5 and pa9 ports flows to the cushion valve D port through the cushion orifice and returns from the remote control valve to the hydraulic oil tank.
Through this orifice, the arm spool moves to the neutral position without returning sharply, so the cushioning is improved.
Pressure line Tank line Pilot pressure line Pilot tank line Electric line
1 Arm (in) 9 Control valve 2 Arm (out) 10 Arm (1) 3 Cushion spool 11 Arm (2) 4 Orifice 12 Console lever lock switch 5 Cushion valve 13 Hydraulic pump 6 Remote control valve (arm, swing) 14 Check valve 7 Lever lock 15 Oil cooler 8 5 stack solenoid valve
Overall View
Enlarged View
