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Super A soft touch

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John in SC

04-21-2008 19:21:23

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I took the advise from the thread of Super A hydraulics (thanks guys)and got both front and rear arms to pick up. The problem now is they will not go back down. I have the plug out and had the motor throttled up pretty good. Still a lot of pressure on the high side and the low pressure has good volume coming out. Is there a pressure relief valve in this system? Maybe it could it be a stuck valve in the head?

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John in SC

04-22-2008 14:48:56

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Re: Super A soft touch in reply to John in SC, 04-21-2008 19:21:23

Thanks for the link to the book. I ordered one today. How did I gauge the pressure on the high side, Well to be honest I did not have a gauge on it but when I opened the allen head plug I got sprayed pretty well, just glad I had my glasses on and luckily I had an old t-shirt on. How much pressure in lbs should be on that line? Do ya think marvins mystery oil may help if added? Anyhow thanks for the replies.

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Pete7

04-22-2008 19:24:01

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Re: Super A soft touch in reply to John in SC, 04-22-2008 14:48:56

Hi John...I don't think I would add anything to the hydraulic fluid. I'd be worried that it could swell or soften the seals.
I think the pump puts out about 1,200-1,400 PSI. Pete

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Hugh MacKay

04-22-2008 02:53:57

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Re: Super A soft touch in reply to John in SC, 04-21-2008 19:21:23

John: Take the advice of both Pete's. I expect they are refering to the same text as I have in my 140 Blue Ribbon Service Manual 25 pages and 7 pages of trouble shooting on hydraulics. My book has 7 sections of which hydraulics in one of them.

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Pete7

04-21-2008 21:24:58

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Re: Super A soft touch in reply to John in SC, 04-21-2008 19:21:23

Hi John. Well,glad to hear you had some progress... the arms moved in one direction anyhow.
Yes there is a pressure relief valve in the head. Probably the best thing for you to do is to get a copy from your dealer of the "Farmall Touch Control Service Handbook" GSS1024. It has a trouble shooting section and a parts picture and list. You'll probably need a hydraulic pressure gauge also since part of the trouble shooting calls for it's use. Think I paid $6.00 for the 32 page handbook(about 10 years ago).
How are you gauging pressure on the high side? If there is high pressure with a open center system like this when the arms are not lifting some thing, then it could be indicating a problem just like you say,possibly with a stuck pressure reliel valve. Also related to high pressure and arms not moving is a orfice in the head and it could be plugged up. The Handbook tells it's location and how to clean it out. Long spring day today and I can't recall much more on the troubleshooting right now. Pete

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P and R Pete

04-21-2008 21:32:53

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Re: Super A soft touch in reply to Pete7, 04-21-2008 21:24:58

binderbooks.com has it for $8.95.

Hope this link will do it. GSS-1024.

Link

Maybe 1/3 0f the way down.
Invaluable!

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