55 - 2
Operation
When right slew is selected, pressurised oil enters the A1
port of the shuttle block from the remote control valve. The
pressurised oil moves steel ball (a) to the left side and enters
the right slew port of the control valve from the B1 port.
The pressurised oil which enters the A1 port goes passes the
through hole (a) and is led to cavity (a) and moves the steel
ball (b) to the left side and is then dispersed to C1 and
S1 ports.
The return oil from the control valve enters B2 port and
moves the steel ball (c) to the right side and returns to the
remote control valve from A2 port.
Key for illustrations opposite and on previous page
A1 Right slew
A2 Left slew
A3 Boom up
A4 Boom down
A5 Bucket open
A6 Bucket close
A7 Dipper open
A8 Dipper close
B1 Right slew
B2 Left slew
B3 Boom up
B4 Boom down
B5 Bucket close
B6 Bucket open
B7 Dipper open
B8 Dipper close
C1 Slew pressure switch
C2 Boom up
C3 Boom up, down
S1 Collected valve
S2 Boom lowering pressure switch
S3 Bucket open
S4 Dipper close
S5 Slew shut-off
Section E
Hydraulics
9803/6400
Section E
55 - 2
Issue 2*
Shuttle Valve
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