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Farmall M---give me 150%!!
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Posted by zooeyhall on April 18, 2005 at 11:42:09 from (204.26.68.3):
My brother-in-law is a mechanical engineer for "a large farm equipment manfacturer", specifically desigining for the ground drive systems on their combines. I had the transmission cover off my M this weekend, had to take out one of the bull pinions to replace the oil seal, and I noticed him looking curiously at the bearings, pinion gears, etc. He asked me what an M was rated for at the drawbar (the manual says 35 HP), and he pulled out his micrometer and started measuring bearing sizes, shaft sizes, transmission case thickness, etc. Did some figuring and he determined that my M trans and drive components were designed to stand an over-torque condition of 150% of drawbar HP. He told me that where he works, the standard is to design for 110% drawbar HP. My brother in law just couldn't get over it how well built my M was. Is he just pulling my leg? If he's on the level, then these older tractors ARE much better built than modern ones!
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