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Figure 3.7: Position of the three-way ball valves to control the spud
3.
Two-way ball valves are used to control the flow of hydraulic fluid:
a)
To the spud cylinder for extending or retracting actions.
b)
To the motor to raise the spud up and down.
4.
These valves must be manually adjusted by the amphibious excavator operator.
5.
Once the spuds have been moved from the horizontal to the vertical position for
operation, lock the spud chambers with the locking pin. Refer to Figure 3.9.
Note:
Make sure the vertical spuds are locked at all times during operation.
Three way ball valve
‘C’
and
‘D’
Figure 3.8:
Spud
position
in
standing
Spud Chamber
