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diesel in oil 4320


 
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larryanderson
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Joined: 12 Jul 2008
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PostPosted: Fri Dec 28, 2012 1:03 am    Post subject: diesel in oil 4320 Reply to specific post Reply with quote

A fellow called with nice 4320 said it gets small amount of diesel fuel in oil.I had it happen on a truck several years ago and it had to do with injection pump .Any input? thanks
 
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PostPosted: Fri Dec 28, 2012 2:59 am    Post subject: Re: diesel in oil 4320 Reply to specific post Reply with quote

I believe it can get in there through the lift pump.
 
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woodbutcher
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PostPosted: Fri Dec 28, 2012 3:18 am    Post subject: Re: diesel in oil 4320 Reply to specific post Reply with quote

Ditto. I solved the same problem on my 2040 by changing the lift pump.
Butch
 
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tim s
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Joined: 01 Nov 2008
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Location: Somerset Ohio

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PostPosted: Fri Dec 28, 2012 3:52 am    Post subject: Re: diesel in oil 4320 Reply to specific post Reply with quote

The lift pump, then the injector pump drive shaft seal, with a possibility of the return fitting clogging a bit creating back pressure to the shaft seal..
 
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Jethro Lilley
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PostPosted: Mon Dec 31, 2012 8:40 pm    Post subject: Re: diesel in oil 4320 Reply to specific post Reply with quote

Thanks, guys... My 2510 is getting diesel in the oil. Changed the fuel filter last spring and the plunger on the take-up pump did not work. Had to take off the bleeder and pour fuel in to fill the filter. Bet that's the problem. Adds about a quart of fuel to the crankcase every 10-13 hours, so I change it often.
 
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Tx Jim
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Location: Coyote Flats,Tx

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PostPosted: Tue Jan 01, 2013 3:53 am    Post subject: Re: diesel in oil 4320 Reply to specific post Reply with quote


Lift pump can't pump fuel if cam lobe is putting pressure on lift pump operating arm. Engine must be rotated a little to get cam lobe away from pump arm so pump can pump fuel.
 
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Jethro Lilley
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PostPosted: Tue Jan 01, 2013 12:12 pm    Post subject: Re: diesel in oil 4320 Reply to specific post Reply with quote

Nah... the plunger is broken. No resistance to it at all. Thanks.
 
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