c/elevator-mechanics

Back in the day, we'd fight a sticking door on a 90s Otis for hours.

A retired mechanic in Cleveland told me to check the sill rollers with a 9/16 wrench first, not the guide shoes, and it worked every time. Anyone still use that old trick on the newer units?

Appreciation post: I swapped the standard brake coil on a 20-year-old Dover for a generic one and it chattered like crazy.

Turns out the old Dover coil had a specific resistance of 42 ohms, and the generic was 38, which the controller didn't like at all. Anyone know a good source for true OEM-spec parts for these older units?

Serious question, has anyone tried using a zip tie to hold a governor rope in place during a splice?

I was working on a Dover in a downtown Chicago building last Tuesday and the rope kept slipping while I was trying to get the splice started. Wrapped a heavy duty zip tie around the rope and the sheave groove as a temporary clamp, and it held everything perfectly still. What other quick fixes do you guys use for a stubborn governor rope?

Shoutout to the old school guy who showed me the right way to set a rail

I was on a job in Cincinnati last year, and the crew was using laser levels for every single rail alignment. It was slow, and we kept having to recheck the floor plates. An older mechanic pulled me aside and had me try his method with a tight string line and a 6 foot level. We got three rails perfectly plumb in under two hours, something that took all morning with the laser. The string doesn't lie and you can feel the tension change if something shifts. Has anyone else found that some new tools just overcomplicate a simple job?

Rant: I used to think the new code for door zone pressure was overkill, but a job in Springfield changed my mind.

We had a call for a sticky door on a three year old unit. The old spec called for 15 pounds of force to reopen, which felt fine. After the new code, we had to drop it to 8 pounds. I thought it was a waste of time, but the building manager called back six months later to say the elderly residents were actually using the elevator more because they felt safer. That one change made a real difference. Has anyone else seen a small tweak in a spec actually improve how people use the system?

Switched to a new gear oil on our 12-year-old Otis units and the noise dropped by half in a week

We've got three traction units in a downtown office building that always had this low grinding hum. About a month ago, my lead had us flush them and put in a synthetic gear oil he read about, Mobil SHC 632. I was sure it was just another oil. But after running them for a full week, the sound meter reading went from a steady 68 dB down to about 62 dB at the machine room door. The change was clear, less vibration through the floor too. Has anyone else seen a big drop in noise just from switching lubricants, or did we just get lucky with these particular motors?

Finally got that weird noise in a 90s Dover unit to stop...

It was a low hum that only happened between the 3rd and 4th floors in this old office building. I tried the usual stuff, checking the guide shoes and rollers, but nothing. On a hunch, I shimmed the rail bracket on the 4th floor landing with a 1/16 inch steel plate... and the hum just vanished. Turns out the whole rail section had a tiny bit of flex we couldn't see. Anyone else run into a noise that was fixed by something simple way down the line?

I used to think a little slack in the governor rope was fine

For years I'd adjust them to maybe a quarter inch of play, thinking it was safe enough. Then last month I was working on a 15 story office building in Tacoma and saw a rope jump the sheave during a test run. The building manager showed me the maintenance log and the previous guy had it set exactly like I always did. That was the moment I realized 'close enough' isn't good enough with safety devices. Now I follow the manual to the letter and aim for zero slack. Has anyone else had a close call that made them change a routine practice?

The time I picked a 3/8 drive ratchet over a 1/2 inch for a tight spot on a Dover governor

I was working on a Dover governor in a tight machine room downtown, and my usual 1/2 inch drive ratchet and socket just would not fit on the adjustment nut. I had to choose between going back down to the truck for a different tool or trying my smaller 3/8 drive set. I went with the 3/8, even though I was worried about the extra force needed. It was a tight fit, but it worked. I got the nut loose without rounding it off, which was a big win. The whole job took about 20 minutes longer than planned, but it saved me a trip down 12 floors. I keep that 3/8 drive set in my bag now for those close calls. Has anyone else found a smaller tool works better in a pinch on governors?

Rant: My partner's gripes about loose screws at home got my van in order

She kept finding nuts and bolts in the laundry, which was annoying. I figured if my home tools were a mess, my service van must be worse. So, I bought a bunch of small containers and sorted everything by elevator part. Now, I have one box for door gear, another for rope clips, and so on. It cuts down on search time during calls, making jobs quicker. Even at home, I keep a dedicated spot for my gear, so no more complaints. Giving each item a place saves so much hassle on the job.

Appreciation post: My new habit of drawing shaft details before every job

I began sketching simple elevator shaft layouts on a notepad before starting any repair. This came after I messed up a door operator fix because I forgot a limit switch location. Now, I always draw the hoistway, showing the car, counterweight, and guide rails. For example, on a recent traction motor issue, my sketch helped me spot a bent rail fast. It cut my troubleshooting time in half and made the repair straightforward. My callbacks have dropped since I started this practice. This little step has really improved how I handle complex jobs.

Shoutout to the veteran mechanic who taught me a trick for sticky doors

I was cleaning a high-rise and the elevator doors kept sticking. A mechanic on site saw me struggling and showed me how to tweak the guide rails. It was a simple adjustment with a wrench, but it fixed the problem right away. I've used this tip in other buildings since then. Do you have any other easy fixes for common door problems?

Why I'm skeptical about the push for all-digital elevator interfaces

Just finished a service call where a building's new touchscreen controls froze during peak hours. We had to reboot the whole system, which meant taking the elevator offline for twenty minutes. Management wasn't happy about the downtime. Are these fancy interfaces really ready for prime time?

How a seized pump changed my mind on maintenance intervals

I always stuck to the schedule for hydraulic maintenance. That is, until an early failure showed me signs I had missed.

Ignore the manual on lube. Go by feel. Twenty years, no seized motor. Unpopular take.

Update: Figured out how to calibrate floor sensors reliably.

Took a few tries, but it's becoming second nature.

Update: My tool wall organization cut service time on residential jobs

I mounted pegboard in my van to hang all my common tools. Now I can see everything at a glance when fixing elevator buttons or leveling cars. It saved me about ten minutes per call this month. Next, I'm tagging my spare parts bins to make finding replacements quicker.

Back when elevator fixes came with a side of conversation

I've been doing this job for a long time now. When I started, you'd often learn about a tricky issue by chatting with the building staff while on site. They'd tell you about little sounds or habits the elevator had that no sensor would pick up. Now, we mostly get work orders from a computer and go straight to the machine. It gets the job done quick, but you lose that personal touch. I think those talks helped us understand the whole system better. It made the work feel more connected to the people using it every day.

A model rocket lesson that changed how I handle tough elevator jobs

In my experience, I used to feel rushed on complex repair jobs and would skip steps. But helping my daughter build a model rocket over the weekend showed me how breaking things into small parts works better. Now I write out each task for a job before I start, and it keeps me from making silly mistakes. Your mileage may vary, but it has made my work days smoother.