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Massey Harris & Massey Ferguson Tractors Discussion Forum

diesel in engine block

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mickey small

05-29-2007 14:44:41

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I have a 1976 massey ferguson tractor 150 was told injection pump had bad seal had it rebuilt still geting desel in the oil pan. A lot the tractor runs really good does any body no what maybe wrong thank you.Mickey

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Danthemasseyman

05-30-2007 00:20:45

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Re: diesel in engine block in reply to mickey small, 05-29-2007 14:44:41

I have an MF Super 90 that did this....yes, it will be the fuel lift pump diaphragm. I just put a new lift pump on and problem solved.

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MF Poor

05-29-2007 17:46:14

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Re: diesel in engine block in reply to mickey small, 05-29-2007 14:44:41

The newest it could be is a 1975. Production of 150's ended in '75. The 150 has the very same Perkins AD3-152 as the 135. Lift pump diaphrams go bad. 3 things can happen. One is an external fuel leak. 2nd is it can suck air through the leaky diaphram. 3rd is fuel leaking into the engine, ending up in the oil pan. In a vast majority of cases, when fuel shows up in the pan, it's the lift pump causing the problem. If it's the original Perkins lift pump, get a rebuild kit from AGCO/MF. They're a snap to rebuild. Then bleed the system and go back to work. Aftermarket pumps are just a few bucks more than the kit. All in all, the rebuild is as easy changing the pump, but neither is very difficult or time consuming.

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mickey small

06-01-2007 15:22:44

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Re: diesel in engine block in reply to MF Poor, 05-29-2007 17:46:14

well I put a new fuel pick up pump & a new injection pump but still geting fuel in oil. like I said before it runs real good..any ideas?

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MF Poor

05-29-2007 17:52:18

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Re: diesel in engine block in reply to MF Poor, 05-29-2007 17:46:14

Here's my 150. Lift pump went south on it just over a year ago. It was drawing air, causing injector pump to air lock. Never leaked internally. Pump rebuild kit was around $20 if I remember correctly. Took all of 20 minutes to rebuild. About that long to bleed system. Problem solved.

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DavidP, South Wales

05-30-2007 02:33:26

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Re: diesel in engine block in reply to MF Poor, 05-29-2007 17:52:18

Hi,
WHAT A CRACKER!!!!!

If you rebuild the lift pump don't forget to hold the lever down as the cover screws are tightened. If not the diaphragm may flex unevenly in use.
Cheers
DavidP, South Wales

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MF Poor

05-29-2007 17:55:47

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Re: diesel in engine block in reply to MF Poor, 05-29-2007 17:52:18

Better picture.

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TomTX

05-29-2007 15:56:29

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Re: diesel in engine block in reply to mickey small, 05-29-2007 14:44:41

Not very familar with the MF150, but does it have a camshaft driven lift pump? If it does it will be the kind that has a little lever for manually pumping. These pumps often develop an internal leak because of the diaphram gone bad. Choice is to rebuild or just get a new pump. Post back and let us know. Tom

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mickey small

05-29-2007 16:59:48

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Re: diesel in engine block in reply to TomTX, 05-29-2007 15:56:29

make since i order a new lift pump is there any way you tell if the old one is bad new one was about $30 dollors ive spent $567.00 on a rebuilt injection pump.I should have asked for help in the first place.thank you for the reply mickey.

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TomTX

05-30-2007 05:59:08

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Re: diesel in engine block in reply to mickey small, 05-29-2007 16:59:48

Take old lift pump apart and look at diaphram for cracks. In future, don't start spending big money for things like the injection pump without knowing for sure what is wrong. The component "change out" method of repair can get very expensive. Odds are very high that your old injection pump was in good shape. Tom

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jims 180

05-29-2007 15:54:29

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Re: diesel in engine block in reply to mickey small, 05-29-2007 14:44:41

Mickey,
Not sure about the 150 but on my MF180 it was the lift pump on the other side of the engine.Big Dean said it will be the problem 90% of the time.Worked for me,good luck with yours.
Jim

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