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Case Tractors Discussion Forum
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Re: case 641

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platte

04-30-2014 14:44:25
70.210.67.213



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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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