9.3.1Spool operation
Take the tilt spool valve for example.
(1) Neutral position (See Fig.9-2)
The high pressure oil discharged from the pump returns to the tank through the
mid-passage.
Fig.9-2
(2)
Pushing-in of spool (See Fig.9-3)
In this time, the spool is pushed in to close the mid-passage. This causes the oil
from the main oil inlet to push up the inlet check valve and to flow into the port “B”.
The return oil from the port “A” flows through the low-pressure passage to the tank
and the spool is restored to its neutral position by the return spring.
Inlet check valve
Main oil inlet
Port"A"
Return spring
Spool
Low-pressure passage
Mid-passage
Port"B"
Fig.9-3
-72-
Summary of Contents for CPC 20
Page 8: ...7 Lubrication Chart 6 ...
Page 97: ...Fig 11 1 Electric system 95 ...
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