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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Still getting diesel in the oil. Ideas?

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Jeff oliver

10-17-2005 20:40:22




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If you have followed this the last several months then you know the problem. B series 1800 , 310 waukesha.Well so far I have put a new transfer pump on, had the injection pump rebuilt Have put two separate sets of seals between the pump and motor once by a almost mechanic and the last by one who has been one for over 40 yrs and am still getting fuel in the crankcase.

Had everything changed and took the tractor to a local plow day to try it out and all. It did however pull a 14 ft JD disk in 4th gear and that is with a miss on one cylinder! :)Pulled it for about an hour and checked the oil and still have enough fuel in it to thin the oil alot. No smoke to amount to much although I do have WMA video of it running with sound if that would help.

I asked a diesel repair shop owner today and while we were talking I got to thinking that if by chance one injector is complely stopped up could that pressure be going through the pump and blowing fuel through the seal?? I am grabbing at straws here I know but I can't figure it out. I am to the point of pulling the bottom pan and making sure all of the pistons are in there! LOL!

One other thing. When we put the last set of seals in I took the timing cover off and I couldn't find any dots on either gear. Didn't rool it over all the way but the pump and engine were times but nothing lined up. It does run though and the injector hole is open when it is timed on the flywheel. Well kinda, I can't turn the pump enough to time it on 2 BTDC for a B series but it will time for an A series 8BTDC.

Any help or suggestion is appreciated!

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cskent

10-18-2005 18:29:35




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 Re: Still getting diesel in the oil. Ideas? in reply to Jeff oliver, 10-17-2005 20:40:22  
I had a similar problem that was in a Case skid loader with a Rossa Master pump. I don't know what pump you have, but here's what we had: Fuel in the oil, so we replaced the "umbrella type seals" still had fuel in the oil, so we were told to replace the drive shaft that the seals are on, that did not help. Then we replaced the bronze bushing in the pump... no more problems. Leak solved. I had to talk to a pump rebuilder, and that was what solved it. Good Luck.

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Jeff Oliver

10-19-2005 21:09:48




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 Re: Still getting diesel in the oil. Ideas? in reply to cskent, 10-18-2005 18:29:35  
I"m on ahead of you as we have already done all of that. they put the new sleeve in when they rebuilt the pump. However I have solved the problem ( at least for me anyway) I took it tonight to a mechanic and told him when it comes home I want it right. He's a good fella and dos mechanicing for a living as well as at night and really knows his stuff.

I'll write with the results.



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travis teets

10-18-2005 07:39:13




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 Re: Still getting diesel in the oil. Ideas? in reply to Jeff oliver, 10-17-2005 20:40:22  
Try looking at the fuel transfer supply pump. Ive seen this happen before on an 88 and 1650. Take care Travis



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J. Schwiebert

10-18-2005 01:56:51




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 Re: Still getting diesel in the oil. Ideas? in reply to Jeff oliver, 10-17-2005 20:40:22  
There are 3 places you can get fuel in the pan. Have you had the injectors out and had them checked? Have you had the exhaust manifold off and see if one of the cylinders has a miss. RAB has told you how to check for the miss. As far as timing there are no marks on those gears. More later



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Jeff Oliver

10-18-2005 03:01:47




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 Re: Still getting diesel in the oil. Ideas? in reply to J. Schwiebert, 10-18-2005 01:56:51  
haven't checked the injectors yet but that was next on the list. Luckily I don't have to have the tractor right now so I can do it when tim permits. It definatly has a miss I just have to find which cylinder. Will try a compression test and maybe taking off the exhaust manifold this weekend. or moving the injectors around.

I take it if one of these is bad it will dump that much fuel into the crankcase? Would a stuck vavle do the same?

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Don-Wi

10-18-2005 06:58:14




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 Re: Still getting diesel in the oil. Ideas? in reply to Jeff Oliver, 10-18-2005 03:01:47  
If one isn't atomizing the fuel properly, the fuel won't ignite very good and then it will wash down the cylinder wall and get into the oil. Same thing if there is poor compression. It may not be the fastest way to get fuel into the oil, but over time it will still put enough in to make a difference, and it sounds like the problem. Donovan from Wisconsin



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RAB

10-17-2005 23:21:33




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 Re: Still getting diesel in the oil. Ideas? in reply to Jeff oliver, 10-17-2005 20:40:22  
Check injectors. Change injector from missing cylinder to another and see if miss moves with injector. Do a compression test or air pressure test to find cylinder fault.
What is apparent is throwing money at the wrong part is a waste of time, effort and money.
Get it diagnosed properly before it becomes a chronic problem.
RAB



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