Installation Instructions

81700·82100·82400 WSM,11770
• Charge Relief Valve
3
3 TRANSMISSION
While pumped and filtered oil flows into the main
oil circuit
through the check valves, excessive oil
passes to the case through the charge relief valve.
Oil temperature
Valve operating pressure
294
to 491 kPa
50°C (122°F)
3.0
to 5.0 kgf Icm
2
42.7 to 71.1 psi
8177F307
(1) Plug
(2) Spring
(3) Charge Relief Cone
• Check and High Pressure Relief Valve
(In Neutral)
(At normal operation)
8177F309
(When high pressure valve activating)
8177F310
The check and high pressure relief valves monitor
the oil pressure in each line ofthe 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
21.6MPa
50°C (122°F)
220
~gf Icm2
3131 psi
(1) Check and High Pressure Relief Valve
(2) Seat Washer
(3) Pressure Poppet
(4) Spring Guide
3-M7