MASSEY FERGUSON 5400 - Operation of the Cooling System

Massey Ferguson 5400 - Issue 1.a
09H01.9
17 bar - 5 bar and 1.5 bar valves - Open centre
E . Operation of the cooling system
The pressure acting on the back of the spool (7)
pushes it towards the bottom of the valve, pressing in
the spring (9) (Fig. 4). It then allows oil to pas to port VR
(Fig. 7) and the cooler. When it leaves the cooler, the
oil is directed to the transmission lubricating system
via the 1.5 bar valve.
5 bar valve
When the oil is cold, the 5 bar valve (1) (2) (3) (Fig. 7)
opens partially. It then allows some oil to pass directly
to port BV of the left-hand cover (Fig. 7), and to supply
the transmission lubricating system, without really
entering the cooler.
Legend
17 bar low pressure
Return to the housing via the cover
MA-09-06067A
BV
VR
1
2
3
Fig. 7