FEL hydraulic tie-in

DCook · May 8, 2007

Renze's comments about damaging the trans concern me. I have only one supply line coming off my pump. It runs to the 3 point, which sits on top of the differential. If I tie in to that line I'll be tying in before the transmission and the 3 point. Renze's first comment says I can't tie in there.

There is a plate if front of the transmission where several lines come and go from. I'll call it the valve plate. Coming off of the valve plate, there is a line that goes to the filter, then the cooler, then back to the valve plate. My suction lines look different than that in the picture on the CaseIH website. I have a suction line coming off of what I would call the differential housing (below the 3 point). It goes to the pump. Coming off of the valve plate is a line that ties in to the suction line at the differential housing.

Can I tie in to the pressure line coming off of the pump without hurting the transmission? Is there enough pressure in the line going to the filter to run the loader?

Kernopelli · May 9, 2007

I can't imagine that the tractor wouldn't support an end loader OR be able to adapt one. Here are two options that's not been discussed. Have you considered a hydraulic pump ran off the PTO? That was my initial descision when I began building mine but decided against it mostly because I do all my mowing with a finish mower and you can't run both without constant hook up- removal of the pump. Many older loaders ran pumps off the front of the crankshaft too. I will bet that if you get down in front of the tractor and look under the bumper to the front of the engine you will be able to see the belt pulley on the crank- mine has 3 bolt holes around the pulley that would allow the bolting of the shaft to a front mounted pump and it even has a hole through the front sheet metal to allow a shaft to extend out to the front of the tractor. I saw a number older loaders set up this way and always just assumed they would not work on my tractor until I investigated it and saw it was a possibility. If neither of these appeal to you, check with your local Case/IH dealer. (My experience with dealing with my 3 local tractor dealers {Kubota, New Holland, Kioti} is you have about 10,000% better chance of obtaining the info you need by talking face-to-face with the service or parts manager as opposed to doing it over the phone). Tell them you are wanting to put a loader on your tractor and want to get a list of what you will need, prices and how it all hooks up. The schematic is somewhat vague on the Case site but I ddo believe that the pump would support a loader. In my manual for my tractor it covers the smaller tractors as well, for your version it appears the pump for the hydro tractors is located in the trans housing. It states " The transmission utilizes a reversable swash plate, variable displacement, axial single piston type pump to provide hydraulic pressure to a stationary swashplate, fixed displacement, piston type motor". Further in the manual it shows the external pump that we have discussed and states it is strictly for the 3 point function. Where you see the line that enters the side of the trans case is for the filter and does not hook into the drive system hydraulics. It states that the pump is rated at 3.4 GPM at 1920 PSI. My opinion is you would be fine hooking into this line (as long as you use smaller cylinders as 3.4 GPM is not a lot for larger size cylinders), but if in doubt check with your dealer. Hope this helps.

Darryl

blackd · May 10, 2007

DCook, you are taking the pressure off the hydraulic pump and rerouting. The HST should have its own pump. It should not effect the xmission at all. My tractor is a Yanmar, with a Powershift xmission, even it, the Xmission, has its own pump.

Think it through. Hi out from pump to open center valve. When valve is activated, part of flow is temporarily diverted to hydraulic ram. Only circuit effected is the 3 Pt, and even then only while valve is activated.

Xmission still works on its own pump. Only common point is the Xmssion is the oil reservoir.

DCook · May 10, 2007

Problem solved. Thanks everyone for the help. I'm going to shop for fittings now.

thanks again,
dean

Renze · May 11, 2007

i'll clarify my comments:
tie-ing into the HST circuit is asking for trouble.
The 3pt hitch on your tractor (any tractor) is a different circuit than the HST.
You can safely tie into the 3pt hitch circuit as long as you put a pressure relief valve on the beginning of your new circuit
(Tee piece - pressure relief valve - valve blocks - loader cylinders)