JD 870 Rear Hydraulics for Loader: John Deere Review  -- John Deere Tractors Discussion Forum and Review JD 870 Rear Hydraulics for Loader: John Deere Review -- John Deere Tractors Discussion Forum

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 03-04-2003, 09:37 Post: 50483
RonH
2003-03-04 09:37:42
Post: 50483
 JD 870 Rear Hydraulics for Loader

I'm looking to add a front loader to my JD 870. I have 2 questions on this: 1) I'm looking at Koyker loaders (Model #155), how do they compare to Bush Hog and Allied in terms of quality/durability? 2) My 870 does not have the hydraulic connections currently installed to hook up to the loader. In the manual, it describes an optional Selective Control Valve which appears to be used for loader or backhoe applications. Can someone give me an idea what it will take to install the proper hydraulics to support the loader and where are the connections made? Thanks.






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 03-05-2003, 05:47 Post: 50538
TomG

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 JD 870 Rear Hydraulics for Loader

I don't know the 870 hookup specifically. Generally, many tractors have a manifold block in the high-pressure line. Connections from a block to a loader valve are pretty easy.

To find a block, trace the steel high-pressure line from the pump to where it enters the 3ph. Look for a box with two plugs and probably a slot-screw head on it. Many blocks also contain a relief valve, so there are one steel line in and two steel lines out. One of the out lines is for the pressure relief and is the smaller of the two.

If a block is present, most have plugged ports for send and return lines that are connected to the inlet and outlet ports of a loader valve assembly and a diverter valve (often a slot-screw head). The diverter valve selects between 3ph only and loader or 3ph operation. Connection just requires proper mounts for a joy stick or in-line valve linkage, connecting the inlet and outlet lines to the block, connecting the loader cylinder lines to the valves and changing the diverter valve to the auxiliary system position. Quick connectors are often used for the cylinder lines.

Connected in this way, both a loader and 3ph will operate but generally the 3ph will not lift while any loader valve is operated. Most any valve assembly intended for power-beyond loader application will work. Valves, linkage and lines may be supplied with the loader. If not, getting a valve assembly that has three control valves is a good idea. A loader requires two valves (one having a float feature) and then the third is available for a rear hydraulic hookup.

The valve assembly should be rated for power-beyond applications. Some power-beyond valve assemblies have two return lines. The low-pressure return (or TANK) line goes directly to the sump. Connection for line is made to a port usually on the side of the cases.







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 03-05-2003, 10:21 Post: 50550
Rhuebner



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 JD 870 Rear Hydraulics for Loader

TomG
Thanks for the post. It was very informative and helpful.

Ron






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 03-06-2003, 12:50 Post: 50635
marklugo



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 JD 870 Rear Hydraulics for Loader

Your dealer should be able to supply you upon purchase of the Koykerloader, a complete installation package, which includes all necessary mounting brackets, hoses, fittings and most importantly, an installation manual.

As far as the loader goes, I have sold BH, NH, Allied(old), Westendorf, TAS, Kelley, Leon and many others. The Koyker stands with the best of them.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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