Oil Pressure

RayBarry · Mar 25, 2016

Good Day from South Africa.

I have a MF 135 to which I installed a re-built engine.
The engine [ADE 152 perkins diesel] had been standing for a number of years [5?], but after bleeding the fuel system, she fired up easily. Had to tweek the injector pump. All was well, except the oil pressure - went straight into the high red zone. Changed the guage but the problem is oil pressure - too high.
Ran the tractor - cutting grass - for an hour thinking that this might settle the pressure, but no luck.
OIL LEAKED FROM THE BELL HOUSING AND THE TAPPET COVER. LOTS OF IT.

A few questions. :shock:
If the engine has been standing un-used for these years - what may have blocked or siezed?
What seal have I popped?
How do I remedy this?
Many Thanks,
Ray Barry

cuby · Mar 25, 2016

I installed a new rebuilt engine in a 756D once and installed a new oil pump pressure relief valve spring and that thing would peg the oil gauge and cause a lot of leaks. I then installed the spring that was used in the previous engine and everything was fine. So might try a different relief spring or what ever it is that that engine uses.

Janicholson · Mar 25, 2016

C7uby is probably on it. The regulator might be stuck in its bore. Hopefully the pan will be a reasonable removal. Jim

Goose · Mar 25, 2016

Relief valve in the oil pump probably stuck.

David G · Mar 25, 2016

I would agree with others, probably will find the ball is rusted in the bore.

showcrop · Mar 25, 2016

Assembly grease can harden up after a few years, then plug passages when it is finally started.

Steve@Advance · Mar 25, 2016

Agree with others, the relief valve is stuck, or was assembled wrong.

The excess oil in the valve cover could have just been a result of too much pressure. Might pull the cover
and start it up one more time, see if there is a plug blown out or just gushing from too much pressure.

The leak from the bell housing, was the valve cover gasket leaking? Is it possible oil was just running down
from above? If not, it may have blown a galley plug, the cam plug, or the rear main seal. It will probably be
obvious once you get in there.

RayBarry · Mar 25, 2016

Good evening and thank you for the replies.
I was hoping that there was a short cut to reducing the pressure. But I think the damage was done within 10 minutes of staring the engine. The
oil leaking from the bell housing is from the drainage hole, so I assume that the rope seal on the rear big end has gone. On the MF135 it means
removing the engine and the sump to get to the oil pump and seals. I was suprised at the leak and amount of oil from the tapper cover and I
plug has not blown!

But thanks, Ray Barry

showcrop · Mar 25, 2016

(quoted from post at 13:15:05 03/25/16) Good evening and thank you for the replies.
I was hoping that there was a short cut to reducing the pressure. But I think the damage was done within 10 minutes of staring the engine. The
oil leaking from the bell housing is from the drainage hole, so I assume that the rope seal on the rear big end has gone. On the MF135 it means
removing the engine and the sump to get to the oil pump and seals. I was suprised at the leak and amount of oil from the tapper cover and I
plug has not blown!

But thanks, Ray Barry

As Steve says cam plug is likely

Oil Pressure

RayBarry

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cuby

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Janicholson

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Goose

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David G

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showcrop

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Steve@Advance

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RayBarry

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showcrop

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