Explanation of Hydraulic Circuit and Operations (standard model) Other Circuits Cushion circuit (arm-out operation stopped)
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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.
SST-04-04-010EN
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
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