Description and Operation of Hydraulic System
2-025
Selection of High speed
★
Spool operating pilot pressure: 1.0-4.9
MPa (10-50 kgf/cm
2
)
・Two of three ports lead to distributor (11)
with speed selector valve (12) moved in the
direction shown by arrow.
・This movement causes the high-pressure
oil to flow into three of twelve ports of
distributor (11). Other three ports connect to
the low-pressure ports with the remaining
six ports leading to the charge pressure
circuit.
・This action feeds high-pressure oil into
three of twelve ports of cylinder block (10).
As a result, only a half of ports feeds the
pressurized oil to pistons (3). This drives
pistons (3) faster with the pump delivery
remaining constant. The motor runs more
rapidly.
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