Probiably won't hurt a thing to clean it out. In fact if it gets bad enough it could plug up your oil pump pickup. I wouldn't be in a super rush to do it though, but if you have the time what the hey. Thing I'd be saying to myself though is if there is that much gunk in the pan how much is there everywhere else IE valve cover ect ect. What kinda oil you running in it? I'd run just regular old cheapo 10w40 and haven't had a problem with our M or 450 sludging up. When you get the pan off you're gonna see all that crud all over the rest of the inside of the motor too. At that time you'll say to yourself "Man, I gotta get that outta there too". You can get most of that crud out of the bottom end of the motor pretty good with the pan off using 3-4 cans of brake cleaner, but you would have to pull the valvecover to get the topend and to be honest it isn't a super big deal to be honest that I'd be yanking the valvecover for that. Brake clean should get most of the gunk outta the bottom end, but you'll inevitably have some left in there. I'd pay particular attention to the oil pump pickup and the oil return passages and make sure you got them cleaned up good. Also, as far as the gasket goes it's probiably right around $10 or so but I'm not sure. You could try some RTV and get by if you're comfortable doing such (I've done it a few times and haven't had a problem) but you can't have it seep into the crankcase. RTV vs oil pump = destruction of motor so that one is up to you. If you do clean the inside of the crank case out with brake clean you gotta and I mean gotta take a squirt can of fresh engine oil and spray it all over everything up in there after the brake clean evaporates. That brake clean will dissolve and remove every little bit of oil it comes in contact and not leave a residue like carb cleaner. The chrolinated stuff works much better and evaporates faster but can be very harmful to engine seals and such. The nonchrolinated stuff isn't nearly as bad for seals or you for that matter LOL. I'm sure someone else will chime in but I don't see a problem with it you just gotta be smart about it.
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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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