Posted by cessnapilot3@gmail.com on March 15, 2009 at 20:43:51 from (208.70.45.62):
Gents,
I was out working on the M today and noticed a slight knock, is rapidly turning in to a BAD knock. At low idle, there is a knocking sound on the bottom portion of the engine. I'm guessing a rod bearing. Now the person I got the tractor from advised that he replaced a "bad" rod bearing, before I got the tractor...but he replaced only one bearing. I would imagine that the crank is probably bad, and has worn the replaced bearing on short order.....or, I suppose another bearing could have went bad. I've got, well, you guessed it, more questions...
My question is, assuming that I decide to take out the crankshaft..to have it ground with matching bearings....does the tractor have to come in half, or can I remove it somehow from underneath?
If the crank appeares to be bad, worn bad that is, then can I have it machined? will the machinist tell me what size bearings to get?
I have not looked at the rod bearings yet, but when I do, is there supposed to be any movement? Any thing else special to look at?
Is it true that I can short the plugs and the knock will stop when I short the bad one?
Lastly, I need an opinion....
Ok, the tractor was essentially given to me, I like it and it seems to like me...but it looks like I'm going to be doing:
At least crankshaft machining and rod bearings (probably a complete rebuild)
New front and rear tires (the ones on it hold air, but thats about it)
And Possibly a new radiatior (don't know why, but water drips from the cooling fan shaft?????), so a water pump too
....AND the front crankcase cover on the engine has a broken off oil cap stud, which is currently JB welded in.....so a new front crankcase cover I guess
....AND LASTLY there appears to be a very slight crack in the block, no leaks from it, I'm not even sure its a crack, but I believe it is...
Now, I really like the tractor and it is obvious that I will have more in it than it is worth... The question is how much more and also , is it really worth even trying to do or am I going to have so much in it that it is ridiculous?
Everything else on the tractor seems decent (lift all pump, transmission, sheet metal etc. etc. I'd like your opinion, keep it going or part it out?
....oh, one other thing, If I proceed, and I put a small fortune in this tractor, is there any "one" part out there that is virtually not available and will render the tractor worthless?
...And one more..........Should I just continue using the tractor with the knock, until it finally dies? Or will this rod bearing problem make it eat itself alive?
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