82410 • 82710 • 82910 WSM,
12271
3 TRANSMISSION
Oil temperature
Valve operating pressure
500 to 800 kPa
50
'c
(122 'F)
5.1
to 8.2 kgf/cm
2
73 to
116
psi
While pumped and filtered
oil
flows into the main
oil
circuit through the check and high pressure relief valves,
and excessive
oil
passes to the housing through the
charge relief valve.
• Charge Relief Valve
12010F30050
J
(1)
Plug
(2)
Spring
(3)
Charge Relief Poppet
12270M30030
• Check and High Pressure Relief Valve
)
12010F30060
CD
® ®
o
The check
and
high pressure relief valves monitor the
oil pressure
in
each line of the main oil circuit.
In
neutral, both valves are open
and
charging oil
enters into the main oil circuit through the valves.
At normal operation, the check valve
in
the high
pressure side
is
closed and
it
pushes
and
opens the
another one.
When excessively high pressure
is
built
up
in
one
line, the high pressure relief valve located
in
this line
is
open and the oil flows into another line.
Oil temperature Valve operating pressure
30.9 to 31.9 MPa
50
'C
(122 'F)
315 to 325 kgf/cm
2
4480 to 4622 psi
(1)
Check Valve Seat
(2)
Relief Poppet
(3)
Relief Spring
(4)
Check Spring
12270M30040
• Neutral Valve
12270F30110
The neutral valves
in
the main oil circuit lines are
open and pass the oil to the case when
in
neutral, and
the oil pressure
in
their lines becomes
low.
And when
the oil pressure
in
the high pressure line increases to a
specified pressure, the neutral valve closes.
Oil temperature
Valve operating pressure
7.36 to
9.81
MPa
Close
75
to 100 kgf/cm
2
50
'C
(122 'F)
1067 to 1422 psi
1.47 to 2.45 MPa
Open 15 to
25
kgf/cm
2
213 to 356 psi
(1)
Neutral Valve
12270M30050
3-M7
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