MF135 Hydraulics Help

[certaindeath]

Hi,

I recently bought a MF135 with front loader. I'm fairly new to tractors and was looking for some help and advice on the hydraulic operation of the loader.

The current setup seems a bit weird to me and I'd like to change it. The loader is currently operated from the draft controls. There is a double banjo fitting that appears to be from the hydraulic oil filler port. One of the banjo fittings goes to an AUX quick connector for implements, the other goes through a screw isolator valve and then tee's off to the lifting rams.

I would like to readapt the system to have separate spool valves for loader control and fit another ram for power tilt function as its currently cable.

I think I need a 2 way diverter/isolator valve for the blanking cover below the seat. I then believe I can use one of its ports to feed a dual spool valve for loader/tilt control and the second port to keep the AUX quick connector (Possibly fitting a spool valve for it later). As far as I understand this would then give me independent but not simultaneous control of each function depending if the diverter/isolator was in Position 1, 2 or 3.

I have made a quick sketch of how I basically understand it will work but would be very grateful if someone with a bit more knowledge/ understanding could confirm before I order any parts.



I understand there will probably be some return pipes required but I have left them out of the drawing at the moment. At the moment the lifting arms only have one pipe each to the rear ram ports however there are ports at the forward end of the ram which are blanked off. I presume its better to use both ports for flow control of Upwards and Downwards movement (Back for up front for down)?

Any help would be greatly appreciated.

Thanks

Ian

 

[PatrickS2222]

Hi Ian, Good choice of tractor there.
It would be of help to us here if you could post some pics (the more the better) of the current set-up, so we can better understand what is best to suggest.
Can you also include what brand and model loader it is please? Cheers.

 

[certaindeath]

Hi,

Thanks for the reply. I think its a MF35 type loader with the cable release bucket tilt. Here's some photos of the loader setup



And this is the current hydraulic fitting and flow valve for the loader. Screwing this valve closed allows rear linkage operation only and opening it allows loader control via the draft levers once the rear linkage has reached the top and the pressure builds.



It all appears to work fine, I just think it would be better on a spool valve especially since I want to add a ram for the bucket tilt.

Thanks

Ian

 

[SIMassey]

Hi,

I recently bought a MF135 with front loader. I'm fairly new to tractors and was looking for some help and advice on the hydraulic operation of the loader.

The current setup seems a bit weird to me and I'd like to change it. The loader is currently operated from the draft controls. There is a double banjo fitting that appears to be from the hydraulic oil filler port. One of the banjo fittings goes to an AUX quick connector for implements, the other goes through a screw isolator valve and then tee's off to the lifting rams.

I would like to readapt the system to have separate spool valves for loader control and fit another ram for power tilt function as its currently cable.

I think I need a 2 way diverter/isolator valve for the blanking cover below the seat. I then believe I can use one of its ports to feed a dual spool valve for loader/tilt control and the second port to keep the AUX quick connector (Possibly fitting a spool valve for it later). As far as I understand this would then give me independent but not simultaneous control of each function depending if the diverter/isolator was in Position 1, 2 or 3.

I have made a quick sketch of how I basically understand it will work but would be very grateful if someone with a bit more knowledge/ understanding could confirm before I order any parts.

View attachment 478490

I understand there will probably be some return pipes required but I have left them out of the drawing at the moment. At the moment the lifting arms only have one pipe each to the rear ram ports however there are ports at the forward end of the ram which are blanked off. I presume its better to use both ports for flow control of Upwards and Downwards movement (Back for up front for down)?

Any help would be greatly appreciated.

Thanks

Ian

Your drawing is accurate except on one point. One position on the diverter valve will operate the three point. This will be done internally on the diverter valve. One will go to the loader valve, and one could go to an auxilary as you stated. The divirter valve will replace the transfer cover on the right of the valve in the last picture. I found a three position diverter valve available with two supply ports and one return port. You might purchase a three spool valve and have two spools for the loader, one for the lift, one for the tilt and one for the auxilary. You would then be able to operate a double acting cylinder with the auxilary right away. With a three spool, it would allow you to operate the loader and auxilary without shifting the diverter valve. If you use only one pressure port on a spool the unused should go to return. To operate, the position lever will need to be pulled all the way back to the constant pumping position.