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Case Tractors Discussion Forum
Show Parts for Model:

case 641

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platte

04-30-2014 13:53:35
70.210.67.213



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Hi. I"m thinking about buying a case 641 this weekend. It runs good but the guy says the tranny don"t work. He says it keeps sheering a pin. replace the pin its fine for a little bit then sheers it again. Anyone know what might be wrong. thanks




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jgarner

05-01-2014 09:44:36
71.126.197.240



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 Re: case 641 in reply to platte, 04-30-2014 13:53:35  
Platte I have a 641 Triple Range. This is a nice little tractor. Don't know how much you know about the 630 series but it is a short run line made from 1960 thru 1963 vs 1960 thru 1969 for the rest of the 30 series tractors. It is bit more collectable I think because of that it never made it to the Comfort King change and most were offered with eagle hitch only I believe, Lorne (ACG), Tom (Case Nutty) and John Saeli as well as Melvin (mEl) who is a long time Case mechanic can confirm that. These guys as well as many others on this forum are a wealth of info and help, at least they have been to me. John (http://saeliimplement.com/)is a good source for new and OEM parts and supplies. Others that monitor the forum are also good sources for salvage parts. If you are needing the pump just post a message out here and one of these folks will chime in. I have done business with most of them and they are all good honest folks.

Hope you get the tractor, its a nice machine.

Jim

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platte

05-01-2014 22:46:13
70.210.68.132



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 Re: case 641 in reply to jgarner, 05-01-2014 09:44:36  
Thanks for all the help. I'm getting the tractor on Saturday. I hope I can figure out the problem soon and put her to work



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Case Nutty 1660

04-30-2014 17:47:16
75.127.24.87



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 Re: case 641 in reply to platte, 04-30-2014 13:53:35  
I am wondering if it is the Case-O-Matic pump that is shearing, that would cause the drive to stop?? Bro thoughts??



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platte

04-30-2014 17:58:51
70.210.67.213



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 Re: case 641 in reply to Case Nutty 1660, 04-30-2014 17:47:16  
Its a triple range. does it still have a case o matic pump



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Case Nutty 1660

04-30-2014 18:32:32
75.127.24.87



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 Re: case 641 in reply to platte, 04-30-2014 17:58:51  
no but like Loren said it does have a hyd pump under the fuel tank/torque tube cover



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platte

04-30-2014 18:35:37
70.210.67.213



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 Re: case 641 in reply to Case Nutty 1660, 04-30-2014 18:32:32  
So do u think if I buy it. it would be a easy fix.



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Case Nutty 1660

04-30-2014 18:50:32
75.127.24.87



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 Re: case 641 in reply to platte, 04-30-2014 18:35:37  
can not say for sure with out looking/tearing into it, but I would think it can be fixed for sure, if its the pump and it is not fixable which is possible for sure a replacement can be found, a new one may be in the 600.00 or more price range, just so you know



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platte

04-30-2014 18:59:30
70.210.67.213



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 Re: case 641 in reply to Case Nutty 1660, 04-30-2014 18:50:32  
OK thanks



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platte

04-30-2014 14:44:25
70.210.67.213



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 Re: case 641 in reply to platte, 04-30-2014 13:53:35  
He said you have to take the gas tank and battery off then you can get to a access plate where the pin is. He told me he has replaced the pin a few times and the transmission will work then the pin sheers and then nothing.he thinks maybe it has to do with the pump. It has a loader on it and he says the loader operates slow. He's asking a good price but I hope its not alot to fix it



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Adirondack case guy

04-30-2014 15:07:38
74.69.160.79



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 Re: case 641 in reply to platte, 04-30-2014 14:44:25  
It sounds like the woodruff key is missing in the range shifter shaft and only the roll pin is controlling the shifting fork, But you don't need to remove the fuel tank to fix that.
If it is a tripple range there is an adjusting pin on the clutch pack, BUT again that is under the tripple range shift cover also.
Still need more details as to what the pin fastenes to what.
Loren



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platte

04-30-2014 15:27:24
70.210.67.213



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 Re: case 641 in reply to Adirondack case guy, 04-30-2014 15:07:38  
OK. I just got off the phone with the guy and he said it was the woodruff key on the drive pump that keeps sheering. He puts a new one in and shortly it will sheer again. he was told the pump was putting out to much pressure but I don't think its the case. Yes it is a triple range. Thanks



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Adirondack case guy

04-30-2014 17:18:20
74.69.160.79



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 Re: case 641 in reply to platte, 04-30-2014 15:27:24  
The pump shaft or gear could be worn. There is a relief valve on the pump and it may be stuck and trying to dead head the pump.
You need to pumb in a gauge and check the relief valve pressure. Sorry, I don't have a SM at my fingertips, so i'm guessing about 1750psi on a 630. One of the Joes, here on this forum, may pop in with the correct pressure.
Loren



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Joe Young

04-30-2014 20:25:28
64.126.67.114



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 Re: case 641 in reply to Adirondack case guy, 04-30-2014 17:18:20  
The service manual calls for the relief valve setting at 1300-1500 psi., with the pump rated at 9-10 gallons per minute.



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platte

04-30-2014 17:22:09
70.210.67.213



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 Re: case 641 in reply to Adirondack case guy, 04-30-2014 17:18:20  
OK thanks for the help. I'm thinking I'm getting a good deal. $1800 for tractor loader with extra bucket and extra back tires



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Adirondack case guy

04-30-2014 14:34:36
74.69.160.79



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 Re: case 641 in reply to platte, 04-30-2014 13:53:35  
What pin and where is it located? Sounds like a somewhat simple fix, which may need a woodruff key replaced or a keyway built up, BUT we need fare more details to answer your question.
Loren



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