Massey Ferguson backlift and extending the hydraulics

[Fievel Farmanimal]

Hello. I wrote a page about how to use the Ferguson System three point linkage and there are also some examples of extending the hydraulic systems. Timeline about 100, 200, 500, 600 and 300 series, maybe some more: http://haapasalontila.fi/mfhydren.html Klick on the link, not the picture.

 

[Celtic Driver]

Hello. I wrote a page about how to use the Ferguson System three point linkage and there are also some examples of extending the hydraulic systems. Timeline about 100, 200, 500, 600 and 300 series, maybe some more: http://haapasalontila.fi/mfhydren.html Klick on the link, not the picture.

Very interesting . Thank you .

 

[Celtic Driver]

Hello. I wrote a page about how to use the Ferguson System three point linkage and there are also some examples of extending the hydraulic systems. Timeline about 100, 200, 500, 600 and 300 series, maybe some more: http://haapasalontila.fi/mfhydren.html Klick on the link, not the picture.

Why do the linkage arms drop down on the 500 and 200 series tractors when the engine is not running .

 

[Fievel Farmanimal]

Why do the linkage arms drop down on the 500 and 200 series tractors when the engine is not running .

The linkage control is one of a kind system in MF. There isn't any control valve between the lift cylinder and the lift pump (in the pic). Let's say there is only a valve on the bottom of that piston pump, that moves left and right. The valve left the pump's suction is closed and the output is opened to the transmission housing (oil tank). Also the lift cylinder is drained (arms get down), because it's directly coupled to pump's output. The valve right the pump's suction (input) is open and output to oil tank isn't open, but the pump pumps oil to the cylinder and the arms rise. Anyway any leakage in the cylinder or in the piston pump valves or in the control valve makes the arms to get down. The control valve itself isn't very tight, because it must move easily back and forth. I think in addition to this there is some extra leakage arranged to make the system more stabile, so that the arms don't make that small up and down movement all the time. Like this at least with the pressure control.

In 300 series the cylinder is so tight that the arms stay up, if you turn the selector valve to combined position. This closes the connection to pump. Older models had piston rings, that leaked more. I hope you get something out of this explanation.

 

[Celtic Driver]

The linkage control is one of a kind system in MF. There isn't any control valve between the lift cylinder and the lift pump (in the pic). Let's say there is only a valve on the bottom of that piston pump, that moves left and right. The valve left the pump's suction is closed and the output is opened to the transmission housing (oil tank). Also the lift cylinder is drained (arms get down), because it's directly coupled to pump's output. The valve right the pump's suction (input) is open and output to oil tank isn't open, but the pump pumps oil to the cylinder and the arms rise. Anyway any leakage in the cylinder or in the piston pump valves or in the control valve makes the arms to get down. The control valve itself isn't very tight, because it must move easily back and forth. I think in addition to this there is some extra leakage arranged to make the system more stabile, so that the arms don't make that small up and down movement all the time. Like this at least with the pressure control.

In 300 series the cylinder is so tight that the arms stay up, if you turn the selector valve to combined position. This closes the connection to pump. Older models had piston rings, that leaked more. I hope you get something out of this explanation.

Thank you for the reply it makes a lot of sense the MF system is like you say one of a kind . Thanks again .