I tried a new way to check door force on a 20-year-old Otis and it saved me an hour

Last Tuesday I was on a service call for a slow door close complaint on a 2003 Otis Gen2. The old way I learned was to use a spring scale on the door panel, which always felt clunky and gave me a rough number. This time I borrowed a digital force gauge from a buddy. I hooked it up and ran the door through a full cycle. The digital readout showed me the exact peak force, 32 pounds, and even logged the whole curve on my phone. Seeing the graph made it obvious the force spiked right at the start of the close, which pointed straight to the guide rollers being shot, not the motor. I swapped the rollers in 15 minutes and the door was perfect. That gauge cost about 300 bucks but it turned a guess into a sure thing. Has anyone else switched to digital for door force checks on the older units?

2 comments

2 Comments

davis.diana8d ago

Honestly, that graph must've felt like cheating.

hayden_martin298d ago

Nah, it's just using the tools you have. A good graph makes a complex idea simple, that's just smart work. Calling it cheating misses the whole point of clear communication.