loader

[mit]

just added a koyker loader to my d1850. i looks fine. will post pics later. there is a third hose that i did not hook up it is for power something. what is the purpose of it? i hooked up pressure and return.the other one i left out.if i install this one would it work better?

 

[Kernopelli]

That depends, generally you should have a hose running from your pressure side of the pump into the valve. One running out of the valve to the other end of the pressure side to operate your 3 point etc. and a line that returns exhausted hydraulic fluid from the cylinders to the tank (reservoir). I am going to assume that with your current set-up that your 3 point may not work. Is your loader hydraulics hooked into remotes on the back of your tractor? This may help also. koyker loader installation instructions

 

[mit]

the control valve has a port that could be adapted for power beyond. now what does that mean?the control valve is shipped open center. i put it on and connected the two hoses and the fel works. now i dont want to ruin anything as yet. so i would like to know if it is fine to use this way or i have to hook up the power beyond.

 

[Kernopelli]

The power beyond is a function that allows your 3 point to work with the loader. Tell us where the two hoses that you have hooked to the FEL valve run to/from and we can help you get it set up correctly. You may want to check out this thread and see if it helps http://www.tractorbynet.com/forums/nh-owning-operating/90432-ford-1220-fel-hydraulic-valve.html

 

[mit]

well here is what i got.the hydralic line from the pump that goes to the 3 pt hitch was cut and quick connects were installed at the right and left of the cut.male and female quick connects. the male hooks up to a hose and goes to the control lever inlet. the female hooks up to a hose and goes to the return of the control valve.the tractor is a mitsubishi d1850. loader koyker 80.the hydralic line that was cut i s on this site:koyker loader installation instructions

 

[Kernopelli]

My understanding of hydraulics is limited at best but this is how mine is set up: The high pressure line was cut (just like yours). The side coming off the pump runs into the pressure inlet port on the valve. The second hose runs out of the power beyond port of the valve and connects to the other side of the pressure line that was cut (thus continuing the fully pressurized fluid from the pump to function the 3 point hitch). The 3rd port on the valve is the tank port and a hose runs from it and dumps fluid back into the hydraulic reservoir(transmission case). With just the two lines that you have, I can see how the loader would work and since pressure is ( I guess) being returned to your hydraulic line on the tractor, your 3 point hitch would work with this set up. What I don't understand (and think is probably vital) is that your present method does not allow for fluid to exhaust back to the reservoir. i.e., when you extend a cylinder on the loader the cylinder is full of fluid from being retracted- (since the cylinder uses hydraulic pressure to push the rod in or out of the cylinder, the cylinders are always full of oil). When you cycle the cylinder either in or out the oil that is being pushed out of the cylinder needs someplace to go and that is where the return to tank (reservoir) comes in. With only two hoses it seems the exhausted fluid is either returning to the second side of the high pressure line running to your 3 point (which would compromise its ability to work correctly) or being pressurized within the loader system itself and with no relief would probably damage something in quick order.

As I said, I am just beginning to understand the basics but it seems to me that with this current set up, you are either going to damage the system or have a 3 point that will not work properly when a load is put on it.

Don't know if this helped or not. Probably the best thing to do if you have more questions would be to pose your question on the "hydraulics" forum to elicit a response from those on the site that have a comprehensive understanding of what you need.

 

[mit]

well what u just said makes a lot of sense.however it may have something to do with what type of center u have on the control valve. like you i am still trying to understand it. if koyker had drawn up a schematic diagram of the system with the explanation it would help a lot. now where would put the the connection for the return to reservoir?there is no holes to put the connection to.do u have to drill one?

 

[Kernopelli]

I have an open center valve on mine and ran the hose from the control valve's return to reservoir port to the top of the transmission case. I did it this way mainly for simplicity sake. I removed the dip stick/filler cap on the top of the transmission case and used galvanized pipe fittings to replace it and hooked the hose to that (it fit in place of the dipstick/ filler cap with no problem). It doesn't sound like the slickest way to do it but I had seen it done on two other Mitsubishis and decided that was easiest. The only issue with doing it the way I did is that you have to take the hose loose to check or add fluid ( which is about a 30 second task and since it is under relatively low pressure I don't tighten everything too tight). Instead of the way I did it you could "tee" into the suction (return) line instead of the trans case and accomplish the same thing. Here is a diagram of a hydraulic circuit that might help http://www.baumhydraulics.com/UserFiles/File/basic_hydraulic.pdf

The single cylinder in the diagram would represent your 3 point hitch in the circuit.

 

[mit]

this looks like the the proper way to do the hook up for the fel. however i spoke to a guy that has his hooked up like mine and he said that he did not have a problem. i am not sure which way to go now. my way looks like i am sending fluid to the 3pt hitch through the line that is supposed to go to the tank.however with the fel controls in neutral i can have enough power in the 3pt hitch. i may not be able to lift the fel and the hitch at the same time.i might be able to lift one and then the other.looking for more suggestions.is the power beyond optional? the 3pt hitch only needs pressure to lift.it goes back down when fluid is released from the cylinder.once the 3pt is up the 3pt control valve bleeds out the fluid into the tank.the 3pt control valve works a little different from the fel control valve.

 

[Kernopelli]

To tell the truth, I'm not too sure either. If the 3 point is working and the hydraulic system doesn't appear to be under a load, maybe the way you have it is how it is designed?? I think I would contact the factory to get their input.
Koyker has a contact number, I would recommend getting hold of them and ask for technical assistance 1-800-456-1107. Let us know what happens.