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  1. Model M prep for 1st start in 20 years - pre-oil engine?

    John Deere
    I have dad's 1950 M and want to start it up for the first time in 20+ years. I'm going to change the engine oil and filter and service the oil bath air cleaner. The tractor is original so the bearings are well worn and it hand cranks freely but I don't want to damage the dry bearings when...