MASSEY FERGUSON 5400 - Lifting Position

Massey Ferguson 5400 - Issue 1.a
09F01.10
Lift control spool valve - Open Centre
D . Lifting position
The solenoid valve (8) is activated to lift the drawbars
(Fig. 6). The lifting spool (2) is moved downwards, thus
directing the main flow to the non-return valve (1). As
soon as the pressure acting on the valve exceeds the
pressure in the rams, the valve opens and the flow
enters the port (V) to raise the hitch.
When the hitch is in the required position, the tractor
electronic system stops the supply to the solenoid
valve (8).
As a result:
- the non-return valve closes;
- the lifting spool valve is positioned on the return
channel R1;
- the flow rate control spool (4) is fixed in raised posi-
tion, allowing the oil to flow again in the continuity
channel N.