9-27
Fig.9-49
3) Lowering position
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
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