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Case Tractors Discussion Forum
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Case 500 diesel question

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Kelly MT

10-27-2005 22:17:09




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A while back I asked about diesel in the oil, everyone thought the transfer pump seal was leaking. Well I finaly got to it and that is it. Question, the gear drive shaft is grooved where the seal runs. Can this be welded and turned back down or should I just replace it. I will get a new seal while I'm in there. PK




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catfish01

10-29-2005 08:15:38




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 Re: Case 500 diesel question in reply to Kelly MT, 10-27-2005 22:17:09  
Many years ago my dad replaced the shaft in one of our 400's and he had to have the gear machined to the right clearance in the housing. Check to make sure it turns ok. GOOD LUCK.



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Kelly MT

10-28-2005 22:43:56




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 Re: Case 500 diesel question in reply to Kelly MT, 10-27-2005 22:17:09  
Thanks for the replys. I was worried about weakining the shaft by welding it also. Could destroy the pump. I called Gomers Diesel in Missoula MT today and they found a new shaft up in Canada. Said it took a lot of looking to get it. Cost $100, the seal is $12.00. It's a lot of money! But It'll keep the old bear going for another 50 years.PK



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Doc Larry

10-28-2005 19:51:43




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 Re: Case 500 diesel question in reply to Kelly MT, 10-27-2005 22:17:09  
Well, there isn't a lot of torque on this shaft but welding the shaft will weaken it, so I wouldn't. You should be able to buy a sleeve with the seal that goes over the shaft and provides a smooth surface for the seal to ride on. These have a name that escapes me at the moment.

Larry



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CAT FISH01

10-28-2005 13:02:12




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 Re: Case 500 diesel question in reply to Kelly MT, 10-27-2005 22:17:09  
I've been told they are not available any more, an injection pump shop said they weld them up and true the shaft. I had a machinest cut the bore a little deeper so the seal set deeper in the housing, he didn't want to chance damaging the shaft. I've ran about 4500hr's on a 500 irrigation motor in the last four years, and it hasn't caused any problems yet.



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c hess

10-29-2005 13:05:39




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 Re: Case 500 diesel question in reply to CAT FISH01, 10-28-2005 13:02:12  
hOW MANY TOTAL HRS ON THAT ENGINE? I



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c hess

10-30-2005 06:05:23




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 Re: Case 500 diesel question in reply to c hess, 10-29-2005 13:05:39  
Just proves again case made i mighty good diesel for its first one. thanks



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c hess

10-30-2005 06:05:08




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 Re: Case 500 diesel question in reply to c hess, 10-29-2005 13:05:39  
Just proves again case made i mighty good diesel for its first one. thanks



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Kelly Mt

10-29-2005 23:39:30




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 Re: Case 500 diesel question in reply to c hess, 10-29-2005 13:05:39  
I"m not really sure. The proof meter shows a little over 10,000 hrs. When I got the tractor at auction the meter wires were disconnected. This old tractor ran a saw mill by Paradise MT for years. I had the heads off last year to replace freez plugs and the cylinder ring ridge was not bad at all. The motor runs strong under field work and has good oil pressure.



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