MF 52/212 Backhoe

[Jaypat88]

Is the top hydraulic line or the bottom hydraulic line the hydraulic input on and MF52/212 backhoe?

 

[Jim.ME]

More info and photos might help determine just what/where you are asking about. Are you referencing a relationship (top and bottom) of a couple lines running along the tractor to the hoe? Are you asking about ports on the backhoe control valve? (I think the hoe control valve, which is mounted horizontally, has a port in each end block.)

 

[Jaypat88]

Needing to know where to hook up each hydraulic line. Looks like there are two ports. The upper port with the hose attached and the lower port. I currently have a setup I need to remove as seen in the second picture. The first picture is the backhoe hydraulics.

 

[Jim.ME]

If you look at the parts book you will see both ports of the backhoe control valve originally had a steel tube run to the area you are calling the lower port. The parts book calls out the steel tube going to the port on the left end of the valve as tube assembly,return. The missing tube to the right side valve port, where you have the hose, is called out as tube,pressure.

 

[Jaypat88]

(quoted from post at 18:00:49 12/23/19) If you look at the parts book you will see both ports of the backhoe control valve originally had a steel tube run to the area you are calling the lower port. The parts book calls out the steel tube going to the port on the left end of the valve as tube assembly,return. The missing tube to the right side valve port, where you have the hose, is called out as tube,pressure.

The hose on the backhoe seen in the picture above connects to the port on the top left. Where does the other end of this hose attach? Does the hose connect to the attached side frame on the MF34 front loader or the control valve?

 

[Jaypat88]

Here is a picture of my control valve and the Side frame hydraulic port.

 

[Jaypat88]

 

[Jim.ME]

Left, right, right, left. For consistency I have always gone with left, right, front, and rear are based on when one is sitting in the seat you would operate the main machine from (not the aux seat like on your hoe), many manuals specify that. Either way the hose is your pressure line and what you called the lower port is the end of the return oil tube coming from the hoe valve bank.

Many loader frames were used as reservoirs, so I am guessing the connection to the side frame of your loader is a port in the oil reservoir, should be no pressure there, so it would be where the return oil may go. As for pressurized oil to supply the hoe control valve. At some point I think you said you were going to remove the cylinder that is currently being used as a lift link on your right side 3 point draft arm, didn't you? If so you have a supply of pressurized oil there if you remove that valve. Now - some machines were plumbed to the hoe control valve then to the loader valve. How was it plumbed on the other tractor? Knowing that would help. The hoe control valve may have a power beyond plug in it and need to be plumbed that way. Your loader valve may have a power beyond plug in it if it is the supply for the lift link cylinder. If they both are set up for power beyond it won't work.

 

[Jaypat88]

Yes, I am planning on removing the 3 point Hydraulic. I was not there when the original owner removed the backhoe. I do recall that it looked to have one hydraulic hose connected to the control valve and one hose connected to the loader which was a MF32 Loader. I will connect the existing hose on the backhoe to my control valve and then connect another hose to the other open port on the backhoe to the reservoir return on the loader.

Is there another use for the hydraulic I am removing? I thought about making a log splitter with it but not sure how string the cylinder is.

Thank you!

 

[Jim.ME]

You know it will work on your tractor, if it is working now. To find out whether or not the valve for it is set at a different pressure than the loader valve, you would need to do a pressure check to find out what it currently operates at. A cylinder might be used for many things. Bore, stroke, and rod size all enter into whether or not it is right for an application. Common wood splitter cylinders will have about a 24 inch stroke, 3.5" or 4" bore and a rod 1.5" or larger in diameter to lessen the chance of bending. That said, people have used many cylinders not like the common ones to build wood splitters with. You can build one with it to your specs, nothing wrong with that.