Off on to the next project

[bdw9862]

Well I have sold the last project (towable backhoe) and on to a new one. I have purchased a Yanmar YM146 (neat little tractor) and am going to mount a hydraulic pump on the front end of the tractor. The front has an electric PTO clutch (not working) and no room for a hydraulic pump in front of it. (for a jaw coupler) Soooo I would like to mount next to it (above it) etc.... and run off the crankshaft via belt drive (more forgiving than chain). I would like to use the non functioning pto clutch and simply lock it up so it revolves all the time and hook to an open system hydraulic pump setup.

This seems to be the easiest solution to me but I am sure I am missing something. By the way I do know there is an existing small hydraulic pump on the engine (not working also) but it is out of commission and too small (and old) to utilize anyway in my opinion.

Attached is a pic of the last project in its new home.

Thoughts?

 

[pokey1416]

That's pretty cool! My hat's off to someone that has the ability to build that.

 

[bdw9862]

That's pretty cool! My hat's off to someone that has the ability to build that.

Thank you sir.

I want to design a system with quick disconnects and perhaps build a small front end loader and/or small backhoe and three point hitch for the tractor. I understand it will be light duty due to the size of the tractor.

I understand open center systems (and used on the backhoe) but don't know much about close center systems. I purchased most of my stuff for the last project from Surplus Center but don't find much there for piston pumps or pumps designed for closed systems.

Thoughts?

 

[davedj1]

My thought is to go with an open system. I am familiar with them and have knowledge of how a closed system works except for in my 12v hydraulic power packs on dump trailers.
I've been told in the past to stay away from belts and hydraulic pumps as it won't have enough grip. Maybe a double chain or double belt? Try the belt and see if for you application it doesn't slip, probably won't if you keep it tight.

 

[Thomas]

Sir you got talent!!! :thumbsup:

 

[bdw9862]

OK, have the process of mounting the pump figured out (back on this project after a long time off). Need some advice on valves. I am going to build a 3 point that I can attach to the tractor and then the implements. I want to build a core aerator and want to use the weight of the tractor to push (via hydraulics) the core a few inches into the soil for my yard. My hydraulic system will be open. I understand that the standard spring center valve will allow this but was curious about one with float. If I use one with float will the ground simply push the implement back up to ground level? (I hope this question makes sense). My yard is flat (Kansas) so the spring valve will probably work just fine but was curious. I would assume most three point hydraulic applications use a valve that can float.

 

[oldnslo]

Float will allow the implement to do just that, float and follow ground contours.

constant down pressure would require at least one of the work ports be blocked to hold position or a totally separate control block supplying a constant reduced pressure set to hold desired down force. This can get kind of elaborate on open center systems

 

[bdw9862]

Thank you sir.

 

[ponytug]

If you want a constant down pressure, the term is a draft control. It is typically a pressure valve that keeps the pressure constant in a set of cylinders, like say a 3PT arms. You adjust it for each implement or usage to get the down force or lift that you want.

I have one on my tractor that works great for a variety of things, but especially mowing, when it transfers nearly the full weight of the mower to my tractor, which means the mower floats, but with the weight on my tractor wheels for better traction.

There is an old thread here;
Thread 'Draft Control? When? How? Why?'
Draft Control? When? How? Why?

All the best,

Peter

 

[bdw9862]

Thank you.