Loader John Deere Selective Control Valve

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Awhile back someone was kind enough (KennyD?) to give me some part numbers from the John Deere sight with instructions as to how to access the parts catalog. As none of my efforts have succeeded after a half hour of trying,
I would appreciate some help once more. I need the schematic parts break down numbers for the JD 750 compact tractor SCV as my loader now goes up all by itself. Any aid will be much appreciated. I'm thinking an internal spring broke but cannot be sure.

 

[JD5210]

The web-site you are looking for is JDparts.com. The link to the parts catalog is on the left side.

 

[Tx Jim]

Cylinders operating on their own accord is an indication of a faulty spool,valve housing or both. There's 2 different valves listed. Cessna & Dukes 1st photo is Cessna & 2nd is Dukes.
http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt

 

[kennyd]

There is a link in my signature Arrow that has a quick tutorial I made. If you need more help lemme know...

 

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Gentlemen thank you very much. Ken ; your tutorial showed me what i was doing wrong. When it asked for "model no" I kept typing in "JD 750 tractor" to distinguish it from the 750 crawler or drill. It always stated "no results found". All I had to put in was "750". Jim: mine is the Cessna SCV. They show a control valve (#22) that looks like a spool so I 'm assuming that's what you are talking about. If I snapped a collar on the housing, this is going to prove an expensive fix.

 

[Tx Jim]

Yes parts key #22 includes the spool as it's only available with a complete valve assembly.

 

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Yes parts key #22 includes the spool as it's only available with a complete valve assembly.

Are you meaning to say if the spring at the end of the spool is broken, I have to buy the entire scv assembly housing?

 

[Tx Jim]

Are you meaning to say if the spring at the end of the spool is broken, I have to buy the entire scv assembly housing?

No the spring is available but I think a new spring will not stop spool from letting oil leak by in valve housing. I suppose R&R of spring will tell the tale.

 

[MuleMn]

Maybe replace o-ring on spool.

 

[arrow]

Maybe replace o-ring on spool.

Obviously something is not retaining the fluid I heard a slight pop and the loader went up all by itself. There is insufficient force to return the spool to its first position without me pushing on the lever to get it back to lower the bucket.

 

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So the story is finished and the loader works fine. Total cost: $4.39. If it were not for the smart parts guy, I would have been out $700. The float spool on the 750 has a non serviceable spring at the end and thus no part is available. My wire snap ring retaining the spring broke allowing the spool not to center and thus the bucket kept going up by itself. The parts guy poured through his computer images and found a similar wire snap ring holding the spool centering spring on the loader of a JD 318 garden tractor. He ordered it, had it the next day, put it on and eureka, the loader works better than ever. If the parts guy had been the lazy type, he would have just said: "sorry, JD no longer supports this valve" and I'd be out the $700. Do not know about other parts for other JD tractors but if you think no part is available, let the parts guy be your friend.

 

[jenkinsph]

arrow,
Good to hear you got the valve fixed. A good parts man is worth alot.

 

[Zebrafive]

I would buy that parts man lunch!

 

[Tx Jim]

IIRC back when I worked behind a JD parts counter there was a book called the Redbook that parts could be looked up giving parts specifications and cross-reference numbers

 

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I would buy that parts man lunch!

I bought him more than that. He could buy dinner for two at a fine restaurant and was elated to do so. I had to wrestle him to the ground before he accepted. Nice guy.

 

[Tx Jim]

Sounds as if a new complete spool valve is needed

 

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Sounds as if a new complete spool valve is needed

Can't get just the spool valve Jim. First the scv is no longer made and secondly, the spool valve is matched to the casing and that is why it was costing $700. Cannot get just the spool valve as they are lapped to the casing.

 

[Tx Jim]

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You overlooked the word "complete" in my statement. As far back as I can remember individual spools weren't available as repair parts. All you can do is get a "complete open center valve" from some place such as Surplus Center that will fit the application.

 

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You overlooked the word "complete" in my statement. As far back as I can remember individual spools weren't available as repair parts. All you can do is get a "complete open center valve" from some place such as Surplus Center that will fit the application.

I see, you are using "spool valve" as the complete selective control valve. I already fixed it Jim. Didn't have to buy a thing except for a few o and wire snap rings

 

[Tx Jim]

I'm glad you got it repaired. Sorry for the confusion but I was just replying to your statement that was directed at me.