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Hydraulics question - not sure what it's called

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CB in central N

11-27-2006 08:13:05

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Greetings.

I have a Ford 2910 tractor with a Series 700 industrial loader. I also use this tractor to run my hay grab after the accumulator has bunched the bales up. I have two levers that control the loader - the left one lifts and lowers the arms and the right one tips the bucket (or the grab).

On some newer loaders and other hydraulic equipment I"ve seen a feature that lets the bucket remain level (or constant) relative to the ground regardless of where the loader arms are. I believe it"s called floating hydraulics ? (not sure) It would be great for my hay grab to do that so that I don"t have to adjust the grab level between unloading a wagon and stacking in the barn.

Is it relatively simple or relatively complicated to change the system in such a way that my loader could do that? Does it involve simply replacing the control valve or is there more to it?

Thanks in advance to all those who answer.

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hazfun

11-27-2006 18:04:52

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

Tool handler.(stays level as you go up and down.
will not dump tools). hazfun

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CB in central NY

11-27-2006 10:35:28

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

Thanks for setting it straight. Yes, the self-leveling loader is what I meant, just didn't know what it was called.

So, just how complicated is it to change the hydraulics to self-level?

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135 Fan

11-27-2006 17:14:09

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 10:35:28

Some loaders like the original case 580 or newer allied used a cylinder connected to the boom that pushed oil to the bucket cylinders. It was in addition to the boom and bucket cylinders. So you had 5 cylinders all together. MF ind. loaders had selective self level in the lift valve. Self leveling can be done a number of different ways but all are going to be pricey. Dave

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Howard H.

11-27-2006 11:24:31

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 10:35:28

On any loaders I've seen, the leveling functionality comes from the mechanical linkages - not the hydraulics.

If yours is a fixed beam loader, the only way may involve some welding...

Post a pic of your loader, so we can look at it.

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mjbrown

11-27-2006 09:51:04

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

I have a JD 260 that is self leveling and it is done mechanically. There is a square bar on top of the loader arms that pivot over the bend in the arms so the bucket is attached in sort of a parallelagram arrangement. The cylinders that control the bucket are attached to that bar not to the loader frame.
Maybe someone can post a picture of one. I can't.

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Howard H.

11-27-2006 09:50:31

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

I think you are asking about self-leveling.

I built a hoist that has a self-leveling pair of forks out on the end. I made this one out of some old plow parts and a set of forklift forks.

The key to self-leveling is the parallelogram created by the hinges on each corner between the top pipe linkage and the main beam (green beam tied to big cylinder). That is what keeps the forks at the same angle relative to the ground while raising and lowering the main beam.

Dad has a commercial front-mount John Deere loader that has an extra hinge in the middle for the levelling control linkages. I studied on that for days, but never could figure out the angles/proportions for how it keeps the bucket level.

This looks a little crude - but it is very strong and will raise very high. Plus, it was almost free except for 4 days of welding...

Howard

Homemade 3 point Hoist

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sasdfsdadf

11-27-2006 09:46:30

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

a self-leveling loader is a whole different loader. They are awesome to operate.

The float position is not what you are thinking about.

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Ken Macfarlane

11-27-2006 08:52:18

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

You are probably refering to a mechanical self-leveling loader. There are a few hydraulic self leveling loaders around, the Kubota L39 is one but I don't know how the valve works and I suspect it is calibrated to the particular machines ratios between cylinders.

A good start for you would be a regular joystick valve that you can run either function at the same time.

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Midwest redneck

11-27-2006 08:35:58

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

I think that what you want is an open center valve, or a float center.

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135 Fan

11-27-2006 08:32:22

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

Float is usually on the lift valve and is good for back dragging. It allows the weight of the loader to hold it down but not under pressure so it can still come up and down over obstructions. I think you can buy just a float adaptor that you plumb into the the lift control. Most industrial loaders have it in the control valve already. You push the lower lever all the way forward and it locks in float position. If you want to keep the bucket level all the time, at different heights then you need a self leveling loader. This is usually done in the boom and bucket linkages. You can get a valve but it's a little complicated to hook up and very pricey. I have a hyd. self leveling valve on my bobcat but it cost over $500. Hope this helps. Dave

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john-mi

11-27-2006 08:21:10

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Re: Hydraulics question - not sure what it's calle in reply to CB in central NY, 11-27-2006 08:13:05

I think what you mean is a self leveling bucket. Its a different loader.

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