Yanmar loader installation: Yanmar Tractors  -- Other Tractor Brands Discussion Forum and Review Yanmar loader installation: Yanmar Tractors -- Other Tractor Brands Discussion Forum

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 05-11-2003, 19:21 Post: 54673
dietmar



Join Date: Jul 2003
Location: Fort Erie, Canada
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 Yanmar loader installation

I am ready to install a home shop made loader on my YM 155D tractor, and have a few questions concerning this installation, first the cylinders are all 2" diameter, is that to large, 2nd the double valve is open center, do I cut into tractor pressure line, route into new valve and exit back into other side of cut pressure line. If any one has experience in this hook up and would like pass on any help, it would be greatly appreciated. Thanks






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 05-12-2003, 00:04 Post: 54694
lsheaffer



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 Yanmar loader installation

2" cylinders will give more lift capacity, but speed will be sacrificed. Plumbing is correct. Open center is the correct valve.






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 05-12-2003, 07:07 Post: 54703
TomG

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 Yanmar loader installation

As Leonard said, larger diameter cylinders give less speed but more power. However, there should be some idea of the strength of the loader and tractor frames in comparison the cylinders. An excessively powerful loader could damage something. I remember a comment once where a homegrown power steering conversion worked but powered the steering against it's stops and bent some stuff.

The hookup described should work. If the high-pressure line continues on to the 3ph, the loader valve should be power-beyond rated. If it isn't there is potential that operating a loader valve when the 3ph was in lift mode with a heavy load could ruin the loader valve. Some PB rated valves have two return ports. The PB port connects to the high-pressure line while the other goes directly to the reservoir.

If the existing line is steel tubing, I'd consider having a pro install the necessary fittings and maybe make a few bends. However, any steel line probably is metric and a hydraulic shop would have to have metric flaring tools etc. My Japanese Ford uses standard NPT fittings for ports but the tubing is metric so fitting threads aren't a reliable guide for the tubing size.

Leonard probably knows if the tractor has a relief valve somewhere ahead of the 3ph. Some loader valves have their own reliefs and some don't, but an installation should ensure that there is a relief valve ahead of the control valves in the loader valve assembly.






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Discussion Boards > Active Subjects > Messages as Posted > Yanmar Tractors Forum

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