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Allis Chalmers Discussion Forum
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gene watkins

12-06-2007 16:12:22




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i bought this tractor with a stuck motor. the two center pistons are 1 inch down from top other 2 are close to bottom. i put blocks on 2 center pistons with chain around motor and hydrolic jack. diesel fuel on pistons. can i break loose that way. thanks in advance gene




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old

12-06-2007 18:43:58




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 Re: wd allis in reply to gene watkins, 12-06-2007 16:12:22  
You would be better off is you took a rag and cleaned out that diesel fuel and then fill them with tranny fluid. Since you have the head off you can speed thing up by doing that and let sit a week or so then if you can do this safely put a table spoon of gas in each and lite it up. The heat warms up the block but not the pistons and that some times does a real good job. I also never use any thing but the starter motor to pop them free. Short fast taps on the start button will do a better job then almost any thing else. So far I'm 2 in 20 on unlocking engines and have out of 20 hard 2 that I had to take apart to free up doing as I have said

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Gene

12-06-2007 16:30:36




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 Re: wd allis in reply to gene watkins, 12-06-2007 16:12:22  
Soak the pistons for quite some time - weeks or a month before applying pressure. I have freed up engines using a similiar method. Pull the pan and check to see that the crank journals are not straight up and down. I had one WC engine that I tried to free up for close to one year. I never did get the pistons freed up.



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