10-30
SK714-5 SK815-5 SK815-5 turbo
FUNCTION
•
Port
A
is connected to the charge circuit.
Port
B
is connected to the tank drain circuit.
The pressurized oil fills port
C
through orifice
a
in valve (
2A
).
Poppet (
2D
) is in tight contact with valve seat (
2C
)
•
If abnormal pressure is generated in the circuit or the shuttle valve of
HST
motor is at neutral and the oil pressure at
ports
A
and
C
reaches the pressure set by spring (
2E
), poppet (
2D
) is pushed to
direction, and oil at
C
is relieved
to port
B
and pressure of the oil at
C
reduce.
•
When the pressure of the oil at port
C
goes down, a differential pressure is occured between ports
A
and
C
because
of orifice
a
in valve (
2A
).
Valve (
2A
) is pushed to
direction by oil pressure at port
A
, and oil at port
A
is relieved to port
B
.
In this way, the pressure in the charge circuit is prevented from going any higher.
RKS00010
1
2
A
2
C
2
D
a
C
A
2
E
B
RKS00020
A
2
D
2
E
2
A
B
C
RKS00030
B
A
2
A
a
C
STRUCTURE AND FUNCTION
HYDRAULIC PUMP
Содержание SK714-5
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