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A farmer told me my torque wrench technique was making his tractor cry | Diesel Mechanics - Vivisector

A farmer told me my torque wrench technique was making his tractor cry

I was working on an old John Deere 4020 in Salina last spring, doing a head gasket job. The farmer, a guy named Earl who'd been running the thing since the 70s, watched me snug down the head bolts. He said, 'Son, you're cranking on that thing like you're mad at it. You gotta feel the click, not just hear it.' I realized I was rushing and not letting the wrench settle. Now I always pause for a full second after the click, especially on those big bolts. It feels slower, but I haven't had a single come-back for a leak since. Anyone else get called out on their torque habits?

4 comments

4 Comments

colescott6mo ago

My buddy snapped a lug off his truck because he just reefed on it without feeling the click.

victor_hill446mo ago

It's crazy how many people treat a torque wrench like a regular breaker bar. That click is everything, and missing it turns a simple job into a huge headache. Did your buddy even know what the proper torque spec was for his lugs, or was he just guessing?

the_alex3mo ago

Earl's right about feeling the click, but that pause after it isn't doing what you think. The click is the internal mechanism releasing, so once you hear it you've hit the torque. Pausing longer won't change anything unless you're worried about your own reaction time. What really matters is the smooth steady pull before the click. Jerking it or going too fast can overshoot the torque before the mechanism catches up. I learned that the hard way on a connecting rod bolt years ago.

wood.uma6mo ago

Remember getting schooled on my first oil pan job. My boss said I was just slapping bolts on like a toddler with a rattle. He made me do it over, really feeling for that smooth pull, and it just clicked. Changed how I handle every bolt now.