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John Deere Tractors Discussion Forum
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49 B crankcase vent pump pumping oil into intake??

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Jeff

06-15-2004 11:56:52




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49 B has oil pumping out of vent pump, just had engine bored,fanshaft rebuilt,governor rebuilt, can remove cap where you put oil in crank case and it does not have any blowby. Any One have any idea what is wrong????




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Tore down Vent pump and f

06-16-2004 12:06:47




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 Re: 49 B crankcase vent pump pumping oil into inta in reply to Jeff, 06-15-2004 11:56:52  
Tore her all down and found the parts are well within specs. The only thing I did find was 1 locating pin between pump housing and front Fan side body was pushed in. but I cannot see that it should have leaked anything with a gasket on it???
everything was in place as the book shows no cracked housing. Now what??? ANY BODY HAVE ANY IDEAS????



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farmuse

06-15-2004 12:29:34




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 Re: 49 B crankcase vent pump pumping oil into inta in reply to Jeff, 06-15-2004 11:56:52  
I have had the same problem with a model 50 which took place of the B but mine only does it when the nose is down hill and I am stopped and idleing. I replaced rollers when I rebuilt, but it still pumps oil into the intake when nose is down hill. Any other ideas Clooney.do the shim/gaskets have anything to do with my problem maybe?



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Clooney

06-15-2004 12:11:00




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 Re: 49 B crankcase vent pump pumping oil into inta in reply to Jeff, 06-15-2004 11:56:52  
Jeff, all that work & the vent pump wasn't also rebuilt?

~If you have the vane type pump you probably have a broken or sticking vane spring or broken vane.. If you have a roller pump it probably has flat roller or sticking roller or pump wear, or missing part..

~About all you can do is run with the filler cap vented for now then when you get a chance pull the vent pump for a look..

JDClooney@aol.com

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