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Re: Farmall M falls flat on its face

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Author  [Modern View]

10-13-2013 12:33:15

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The pistons are not flat heads the have a large dome. I did a compression test. From the front cylinder 100psi 125psi 105psi 110psi. Im also going the check out the govenor. Checking for broken springs debris build up make sure thing moves. Anymore ideas?

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10-13-2013 20:13:12

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 Re: Farmall M falls flat on its face in reply to FarmallKeith, 10-13-2013 12:33:15  
Adjust the valves first then redo the compression test. Tight valves can do the deed. Jim

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10-13-2013 16:59:00

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 Re: Farmall M falls flat on its face in reply to FarmallKeith, 10-13-2013 12:33:15  
Cylinders are supposed to be within 10% of each other. It appears to me that one cylinder was fixed, the 125 one. The other 3 have normal wear. Number 1 is 25% less, 3 is 16% less. New flat tops should give about 120-125 psi. I don't know what psi your domed pistons are supposed to have, but the IH fire craters are about 135. I know zero about pulling, but your engine has some wear on it and what you may not notice in the field shows up in pulling.

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