Position Control Valve; M6800(S) - Kubota M6800S Workshop Manual

M6800 · M6800S · M8200 · M9000, WSM

5. POSITION CONTROL VALVE

[1] M6800(S)

Neutral
Oil forced into the control valve through the P port
pushes open the unload valve (5) and then returns to the
transmission case through the T
Oil behind the unload valve (5) returns to the
transmission case through the spool (4) and the T
Since the check valve (3) and poppet valve (2) are
closed, oil in the hydraulic cylinder does not flow to the
transmission case. Thus, the implement remains at its
fixed position.
(1) Valve Body
(2) Poppet Valve
(3) Check Valve
(4) Spool
(5) Unload Valve
Lift
When the control lever is set to the "LIFT" position,
the spool (4) is pushed to the left.
The oil forced into the control valve through the P port
is directed to the back of the unload valve (5) to close it.
The oil pushes open the check valve (3), and flows
into the hydraulic cylinder through the C port to lift the
implement.
(1) Valve Body
(2) Poppet Valve
(3) Check Valve
(4) Spool
8-M7
HYDRAULIC SYSTEM
port.
1
port.
2
C : C (Cylinder) Port
P : P (Pump) Port
T : T Port
1 1
(To Transmission Case)
T : T Port
2 2
(To Transmission Case)
W1013645
(5) Unload Valve
C : C (Cylinder) Port
P : P (Pump) Port
W1013790
KiSC issued 03, 2008 A