9-15
Fig.9-36
When Main spool is shifted to the lowering position,Unloading spring is connected to the
Tank(T2),and the force imposed up the right hand side of the unloading check,therefore the fluid
from the pump flows into the Tank(T1).
Consequently the force imposed up the left hand side of the main check valve,which is connected
with Plate-B to open the T3 port.
By this action, the fluid from the cylinder flows out and into the tank through chamber,so the
piston is released
3) Lowering position
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