OT to this Forum... actual broken tractor...

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Neighbor's loader, updated (from 404) 466 engine, spun #3 rod bearing and #2, #3, #4, #5, and #6 main bearings WITHOUT being run out of oil or getting coolant in the oil, not sure what happened, my GUESS was they operated it at an extreme angle, they said no to that.

ENNYWHO, "it is DEAD, Jim"!

Extreme angle, in your part of the country?

No oil pressure ??

Hi The first question I would ask is how much oil came out, second question Would be how clean was it, and did the filter look new as well or not. As I had a guy come here with a motor in a similar mess it was full of cleanish looking oil with a slight black tint/streak exactly to the mark. the oil filter hadn't been changed in 200 hrs from what was written on it.
We come to find out from the old man the motor used some oil. Turns out while the old man was on holiday the kid had run the thing for about 3 weeks, run it low and seized it up. The cheating little twerp realized the old man would have a fit, so him and his buddy dragged it home and topped the oil up. He wasn't as smart as he thought, should of used a pail of old motor oil!


I would say the other options could be oil pump/drive failure. or a steel line in the oil system failed either on the suction or pressure side if it has that type system. I had that happen with a tractor once that had randomly flicking 30- 0 oil pressure. The pipe from the pump to the block was broke and jumping around with vibrations from running, sometimes the pipe and hole lined up giving pressure and dropped it when the moved away. The guy was lucky we caught it before it messed the crank or bearings, Good old Russian engineering L.O.L
I'm guessing to that the oil hadn't been diluted with diesel, or that the suction screen or oil filter wasn't plugged or anything else obvious with it from first glance .

Regards Robert

They were burying rocks over by Rock Lake.

Surprised it didn't vent the block.

Looks like the bolt came out of the rod cap.

Rod bolts were still TIGHT and in place. We pulled the cap off before the photo.

Not good. Probably stood her on end to long with it running. Might have to dry sump it for them.

Not telling you anything you don't know...sometimes stuff just wears out.

One of my cousin's TW 30s spun a main some 15 years ago without running low on oil. The inserts had lots of little crater marks all over them. The shop manual had pics of types of bearing failures, including one exactly like he had. The manual said it was caused by oil contamination due to dirty air. It could have been from just bumping the filter the wrong way upon removal. I expect that this is one reason that in the Cat manual for my dump truck it said. "Don't you even dream of opening up that air filter housing unless the restriction indicator tells you to"

I have seen 466 engines run dry while still full of oil and oil pump trying to do its job. Very tired engines with a turbo and good boost pressure will build to much case pressure. To much oil will be held up stairs and not allowed to drain down back to the pan fast enough. Only seen this on tractors doing hard tillage work where they were under a pull with out letting up the load.Tractor would have really good oil pressure until you dropped the v ripper. The deeper you sank it the worse the oil pressure. Owner kept thinking the gauge was off. Couple of days like that and he had a knock. Second one I saw spun the mains. I have only seen this when the pump had been turned way up. Seems like a loader might push hard to fill the bucket, but get a break for a moment. Where they doing long hard pushing, or extended pulls? Did you check to see if this engine was making oil before it died? A little antifreeze or diesel will cause a mess too.

If it spun all those at once, it had to be running with no oil pressure.

I can't imagine doing that much damage THROUGHOUT the engine without having lost oil pressure. 2, 3, 4, 5, and 6 main caps plus crank rod journals? There may have been plenty of oil in the pan, and the pump may have been pumping, but I'm going with oil didn't get to that area possibly because a gallery/passage in the block was blocked. At this point, doesn't matter. If magnafluxing the block shows that it is still good, passages get opened and rodded before the whole thing gets hot tanked, that crank gets welded up on the journals and ground back down to standard if the crank isn't destroyed, oil pump and sump pickup get replaced. I'd be looking that the cam and it's bearings and lobes too if turns out to be an oil pressure problem. Of course, he might be able to find a complete used engine, block, or internals for less than the cost of repairing his existing. Never can tell.

OUCH!!!

Mark

Camshaft driven oil pump? See if there are any teeth left on the camshaft.

Crank driven oil pump. External drive gears look good. Haven't looked inside yet.