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Diesel fuel in the oil on JD 720

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BEL@IN

05-17-2004 15:54:22




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Changed the oil in my 720 and was suprised to find it half diesel fuel. Drained about 18 qts. Something is wrong and I don`t where to start. As usual and help will be greatly appreciated.




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Mike M

05-17-2004 18:36:53




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 Re: Diesel fuel in the oil on JD 720 in reply to BEL@IN, 05-17-2004 15:54:22  
Don't be so suprised these are infamous for mixing oils and fuel.Afterall they have do have 8 separate pumps ,10 with a pony motor, and alot of times they get confused what to pump where.



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Clooney

05-17-2004 17:48:40




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 Re: Diesel fuel in the oil on JD 720 in reply to BEL@IN, 05-17-2004 15:54:22  
BEL@IN, Russ gave you the most obvious places to check for leaks.. You might also use a mirror & look under the pump bracket to see if the pump gasket(s) are leaking.. A real clean looking area is a good indication the leak is near by..

CAUTION: don't use your hand to check for injector line or fitting leaks with it running as that high pressure injection system can inject the diesel fuel right through you skin from a pin hole leak....

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Russ

05-17-2004 16:14:21




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 Re: Diesel fuel in the oil on JD 720 in reply to BEL@IN, 05-17-2004 15:54:22  
Some things to check are lose or broken lines.Leaks in pump seals are common .Take the cover off the pump housing and run tractor and see if you see any leaks.Another place to check is under valve cover.The lines and injectors could be leaking. Hope this helps. RUSS



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