If you plug the pickup screen with sludge you of course are in trouble. My point is that on a M farmall tractor you have a bypass oil filter. It receives oil from the same passage that is feeding the main bearings. No oil going through the oil filter goes to the bearings as it is dumped back into the oil pan and then is pumped again through system with the rest of the oil. So, if the filter is plugged you still have oil in gallery feeding the bearings. If the sludge is sufficient to plug the oil gallerys that is a different situation. If the sludge is gritty crud, you are feeding it to all the bearings regardless if filter is plugged or not. A full flow filter receives the oil from the oil pump and from there it goes into oil gallery so if the filter is doing it's job on those systems you will get the crud out. When filter plugs, the back pressure will open the bypass in the filter or filter base and still oil will flow to oil gallerys but it will be unfiltered.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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