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Valve detent balls


 
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farmall pete
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PostPosted: Thu Jan 04, 2018 9:32 am    Post subject: Valve detent balls Reply to specific post Reply with quote

Took 656 auxiliary valve apart to replace seals, can't figure out where the 3 detent balls (#6 on diagram) go when reassembling. When I took the valve apart, they were laying in the pipe (#15), see photo.

I tried reassembling with the balls in the pipe as I found them, but the detentes don't work. Please help!
 
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47M
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PostPosted: Thu Jan 04, 2018 10:05 am    Post subject: Re: Valve detent balls Reply to specific post Reply with quote

I don't know a thing about a 656 auxiliary valve, but in looking at what you've posted, assuming there's a third hole in part # 10,
wouldn't they sit in those three holes somehow as part # 10 slides into part # 7?

I'm sure others who know about these will be along shortly to tell you how to get it assembled.
 
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pete 23
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PostPosted: Thu Jan 04, 2018 11:01 am    Post subject: Re: Valve detent balls Reply to specific post Reply with quote

If you had it here I could easily show you how it is assembled. To tell you how, that would be a full page . The three balls go into those three holes in the actuator (10) but, several other things have to happen first. Also, put grease on balls to hold them in place until the spring positions them. Now, that didn't help much I know. Even the book is not very good on this one and I developed my own methods over the years.
 
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caterpillar guy
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PostPosted: Thu Jan 04, 2018 12:41 pm    Post subject: Re: Valve detent balls Reply to specific post Reply with quote

The balls go into your top line of parts. The one with the three holes radially around it. As Pete 23 said. With some grease then slide the sleeve with the flange on one end goes over it. There are grooves on the inside that work with the balls for the detent. This can all be done after the rest is assembled.
Then set the detent trip after it is on the tractor and operating through the small push in cap on the backend of the valve assembly. We have discarded all of them in things as we have went through the valves. Saved the parts someplace .
 
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farmall pete
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PostPosted: Thu Jan 04, 2018 1:54 pm    Post subject: Re: Valve detent balls Reply to specific post Reply with quote

Thanks for the help everyone. I was able to get them together correctly and now both valves (tractor has 2) have detent in all 4 positions: up, center, down, and float. And no more leaks! I hooked it up to my haybine to test them, and they work as they should: when raising, the valve lever locks in raise position until the haybine cylinder is all the way up, then the valve trips back to center. Same with the down position.

Part of the reason I'm posting these details is because I looked through the archived posts on the subject, and I could not find a detailed description of how the detent part of the valve goes together. So for anyone in the future who is wondering how to do this, here's my best explanation:

Clamp spool vertically in vise, with flat end where lever connects in jaws. Slide parts 16 and 17 onto top of spool. Install new o-ring, 14, onto part 10. Insert new piston with o-ring, 8, into part 10. Slide parts 11, 12, and 13 onto part 10, then while holding spring compressed with your fingers, screw part 10 assembly onto top end of spool in vise. Tighten part 10 with a small punch inserted into one of the holes. Dab some grease on detent balls, 6, and insert them into 3 holes around part 10. Slide part 7 into back end of part 15, then slide this assembly over part 10, which is now connected to the spool. Make sure the detent balls stay in position as part 7 slides over them. Now insert ball, 5, and ball seat, 4, into top end on part 10. Then insert spring, 3, and screw in plug, 2, while pushing down on spring to compress it. As a starting point before adjustment, note position of plug, 2, before disassembly and tighten to the same position. Screw cap, 1, onto part 15. Replace o-ring, part 9, at front of valve block. Then insert spool assembly, parts 1-18, into valve block and tighten part 15.

Hope this helps someone in the future who had the same question I did. Once again, thanks everyone.
 
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