ad3.152 oil pressure

4play · Jul 3, 2017

I had a thread awhile back about losing oil pressure after warming up, engine cold-start is a solid 50psi, after 30 minutes or so it will drop to 5-10 or less. No knocks, noises, runs great and no smoke. Anyway I have finally opened a place in the shop to start tearing this MF 245 apart.

The only thing I have done so far is removing the round plate on the bottom of the pan. I found quite a bit of bearing shavings and slivers, I assume most of it is thrust bearing material. I eyeballed crankshaft end play and its around 1/8" :shock:. Looks like its time to plan a split, engine removal and rebuild???

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4play · Jul 3, 2017

I forgot, this isn't real important yet, but this little cover looks like it had a metal screen at one time right? I looked online and have not found a good pic of this cover, what it should look like or if a replacement is available. It even looks like a new replacement oil pan does not even come with the cover or hole.

I know the thrust washer problem is probably going to cost me a crankshaft, but I still need to find what has caused the loss of oil pressure too. From what little I found about the thrust bearings, is this a common failure? If so, is there a fix or better way to prevent this from happening. There is not a lot of wear or use on this tractor, its lived a 1400 hour life but the engine is hurt.

John Deere D · Jul 4, 2017

Item # 2 ..Oil strainer assembly:

Picture is of a STRAINER used on a A3.152 Perkins Diesel...MF FE 35 X:

I had a strainer brake up ....Crankshaft had to be ground. Machined shop was able to build up Crankshaft "THRUST FACES" and machined to standard...30 + years ago...1984:

Bob...

rockepg · Jul 4, 2017

Before you get carried away pull the bearing caps off and have a look. Pull the thrust washers, if they still exist, and check the crank surface. You "might" get lucky but most likely not with that much movement.

ptfarmer · Jul 4, 2017

Did the engine rpm drop any (or sound like it was under a little load) with the clutch pedal depressed?

dacaseguy · Jul 4, 2017

I had to replace the crank in a AD152 this winter. I got a good used one from Allstates Equipment. Dick

4play · Jul 4, 2017

Engine ran fine, no power loss, no smoke, no weird idle or noises, nothing different when clutch engaged or disengaged. Honestly I would have no idea about the crank end play if it wasn't for looking at the loss of oil pressure concern and seeing a lot of bearing pieces inside that cover.

I still plan on dropping the pan before I pull the engine and taking a look at a few of the bearings. I guess I can try to see what the thrust bearings and surfaces look like.

ptfarmer · Jul 5, 2017

I ran across a engine that the thrust bearings got mangled, and were laying in the oil pan (they were separate of the bearing shell like on the a3.152). When you would push on the clutch the engine would loose some rpm like it was under a load. The crankshaft was rubbing up against the block, and it wore the thrust surface on the crankshaft .250" wider than it was supposed to be. It didn't wear the block oddly enough where the thrust bearings sit against. Sounds like you may still have some thrust bearing left, or it could be wearing the crankshaft out.

ad3.152 oil pressure

4play

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4play

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John Deere D

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rockepg

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ptfarmer

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dacaseguy

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4play

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ptfarmer

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