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John Deere Tractors Discussion Forum
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70 JD with with fuel in the crankcase oil

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jlow

02-24-2005 15:05:59




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I just go a diesel 70 running after sitting for a couple of years. I noticed after running it for a spell that there was fuel in the crankcase oil. My question is where is it coming from and how do I go about fixing it.




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Mike M

02-25-2005 10:25:49




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 Re: 70 JD with with fuel in the crankcase oil in reply to jlow, 02-24-2005 15:05:59  
I've had a couple of those leaking at the delivery valve holders. Was just able to tighten it up and it quit leaking. One I was able to get a wrench on in there the other I think I had to pull the pumps out to do it.



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720Deere

02-24-2005 15:30:48




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 Re: 70 JD with with fuel in the crankcase oil in reply to jlow, 02-24-2005 15:05:59  
It could be what msb said or it could be simple like leaking injector lines. I had to tighten the lines on my 720 diesel when I purchased it. It had been sitting for several years at that point. The transfer pump seals might be suspect after sitting for a while also.



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msb

02-24-2005 15:14:51




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 Re: 70 JD with with fuel in the crankcase oil in reply to jlow, 02-24-2005 15:05:59  
Two places it could be coming from .The transfer pump and the most likely source is one or both of the injection delivery valve holders.Remove the cover over the rack and look for a clean area below the injection pumps.The rack will have to be rebuilt by an authorized injection pump service, since the rack will most likely need balanced after the repait.It shouldn't be terrible expensive to have the rack rebuilt.

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jlow

02-25-2005 07:50:20




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 Re: 70 JD with with fuel in the crankcase oil in reply to msb, 02-24-2005 15:14:51  
Thanks guys.



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