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Disassembled the oil drinking 706 gas this afternoon

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andy

09-09-2002 20:47:53




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Some of you guys responded to my post. I had a IH 706 gas that was using oil and down a cylinder. What I found was a burnt valve in the number 1 cylinder which didn't have any compression. Also it seems as if the oil rings are quite worn compared to the compression and scraper rings. The tractor had good power but used oil in excess. All of that burning oil probably put some carbon under the valve and let hot gasses begin to escape. In a matter of time a hole burns into the valve margin. The pistons look great - almost like new. The sleeves look good too. The rod and main bearings look OK but while I am there I plan on replacing them. Looks like I found my problems. Wonder what caused this to happen? Probably dirt some how. All of the air intake was tight. Intake manifold was tight to the block. Don't know how that wear would have taken place. Maybe a bad air filter at one time. Thanks guys. New question .... what should I deglaze the cylinder walls with? A deglazer with those round abrasive balls on it? I guess I prefer this kind over the flat stone type hone. How much deglazing is necessary? Thanks again. andy

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casered

09-10-2002 08:58:08




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 Re: Disassembled the oil drinking 706 gas this afternoon in reply to andy, 09-09-2002 20:47:53  
Filter is good possibility for dirt to enter. When you have reconnected all your air inlet fittings a quick way to make sure you have them good and tight is to spray each connection with a can of ether while the engine is running, if it speeds up then you have a connection that needs tightened or a hose that has a crack and needs replaced. Used this method on a friends tractor that we thougnt connections were tight but they weren't. Just a thought. Keep us informed.

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Larry F

09-09-2002 21:38:11




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 Re: Disassembled the oil drinking 706 gas this afternoon in reply to andy, 09-09-2002 20:47:53  
Andy - Glad to hear that 706 problems aren't too serious. Still surprises me that your oil rings would be worn so badly with short hours but I think you may be right about the air filter. Doesn't take long running an engine in dusty conditions (while you were running dryer??) to do some damage. I like the deglazer you describe with the small abrasive balls. I've always been told only use it enough to 'roughen' the cylinder walls with a nice cross hatch pattern and no more.
Good luck gettin her back together.

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