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remote hydraulics

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Joined: 02 Feb 2007
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PostPosted: Sun Aug 27, 2017 12:29 pm    Post subject: remote hydraulics Reply to specific post Reply with quote

my '78 3600 has a remote valve located under the seat. it has 2 levers (2 spool?) and the hose connections on the back of the tractor are 2 pair (double acting). i have one pair connected to a dunham-lehr loader.

the remote has 2 levers which have detents in 3 positions, fwd, center and aft. fwd operated the loader, center allowed the 3pt arms to operate, and back ???. i have always moved both levers to the same position when operating.

is the aft lever position for the second pair of (unused) remotes?

the manual says the right spool valve of a two spool remote has the float valve. there is also a float valve adjustment on the valve block. can someone please explain how to use the float feature on this remote setup?
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Joined: 04 Mar 2008
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Location: Davie County,NC

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PostPosted: Sun Aug 27, 2017 5:59 pm    Post subject: Re: remote hydraulics Reply to specific post Reply with quote

Does your loader have a separate control valve of it's own? It sounds like it does. By having your under seat lever forward, you are using the under seat valve to supply flow and pressure to your loader control valve. Any float for the loader would come from the loader's own valve.

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Larry NCKS
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Joined: 23 Dec 2001
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PostPosted: Mon Aug 28, 2017 4:37 am    Post subject: Re: remote hydraulics Reply to specific post Reply with quote

I'm guessing Garry is correct about one valve being used to supply flow to a separate loader control. If not, you would know what the three positions of the valve do.

Never move the 2nd lever out of the center position unless you have something coupled to the lines coming off that portion of the valve. It apparently has nothing to do with your loader. If it did one of those levers would operate your loader boom and the other your loader bucket.

Center position is neutral, no flow. This valve will take priority over your 3 point. That's why it has to be in center position for 3 point to operate.

Forward position is drop/dump or flow to secondary valve in your case on the valve your loader draws its pressure and flow from.

Rear, or aft as you call it, is raise/curl.

I'm not sure on tractors of that vintage, but earlier ones had a screw type valve that could be opened to allow the valve to be single acting. In other words, the forward position of the lever put that valve into float. In float whatever was attached to that valve would not be forced down but would simply settle to its lowest point of non-resistance.
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