c/elevator-mechanics

Just hit 500 service calls on the same Otis Gen2 system

I was looking over my log book and saw the count. It's a set of four elevators in a medical building downtown, been maintaining them for about three years now. The surprise was how many of those calls were for the same door zone sensor issue, maybe forty times. Anyone else find one specific gremlin that just won't quit on a particular install?

Warning: I just read a report about elevator door reopening devices failing after 200,000 cycles

I was looking through some old inspection bulletins from the state safety board last night. One from 2019 had a case study of a hospital elevator in Cleveland where the door reopening device failed. The report said the infrared sensor passed a basic test, but the mechanism that actually stops the door had worn out after about 200,000 cycles. They found the plastic cam was completely sheared. I never thought to check that specific part during a routine service. How often do you guys actually inspect the physical stop mechanism, not just the beam?

Reading about the first elevator code in New York City from 1860

I was looking through some old trade history stuff online and found out the first elevator safety code in New York City only required a single hemp rope. That's it, just one rope to hold the whole cab. Found it on a museum archive site. Makes you think about how far the regs have come, right? Anyone else ever stumble on an old rule that just seems crazy now?

Rant: I swapped out a standard limit switch for a sealed one on a parking garage lift

The old one kept getting gunked up with road salt and grime every winter, failing maybe three times a year. Last fall I put in a sealed unit from a different supplier, cost about $15 more. It's been through a whole season now with zero callbacks. Has anyone else found a specific part upgrade that just stopped a chronic problem for good?

A building manager in Phoenix said they'd rather have old relay logic than a new controller

I was working on a call at a 1980s office tower last week. The manager told me he's had three new controller boards fail in two years, but the original relay panel ran for thirty with just cleaning. He said the new stuff is too complex to fix on site. I see his point about reliability, but I also think we have to move with the tech. What's the better path forward, keep old systems alive or push for full modernization?

I was at the new city hall building in Portland and the main elevator's governor rope had a weird, braided nylon sheath I've never seen before.

Has anyone else run into this type of sheathing and know if it's a new spec or just a one-off from the manufacturer?

That one call at the old hospital in Springfield that ate my whole weekend

Got called for a stuck car at Mercy General, figured it was a simple door lock issue. Turned out to be a frayed governor rope on the old Otis 401 that was just barely catching, causing random safety trips. Spent almost 14 hours over two days tracing intermittent faults before I found it. Anyone else run into a governor problem that hid itself that well?

Chatting with a firefighter at my kid's school changed how I think about emergency recall

I was at a parent thing last week and got talking to a firefighter dad. He mentioned they had a call where the elevator recall didn't activate because the smoke detector in the machine room was covered in dust. He said, 'We spent ten minutes trying to figure out why the car wouldn't come down.' I always check the car top and pit sensors, but honestly, I've been skipping a full machine room check on some service calls to save time. That story hit different because it's such a simple thing to miss. How often do you guys actually blow out the machine room sensors during a routine visit?

Question about those cheap digital inclinometers from the hardware store

I was sure the $25 one I grabbed for a quick leveling job on a governor in a Buffalo high-rise would be junk, but after checking it against our shop's $500 unit, it was dead on, so has anyone else found a surprisingly good budget tool for precision work?

The phantom door lock fault that ate my whole weekend

Got a call for a door not closing on a 15 year old hydraulic unit. The lock monitor kept dropping out. Figured it was a bad switch, easy fix. Spent 4 hours checking every limit, adjusting the lock cam, even replaced the whole lock roller. The problem? A single strand of copper from a wire had broken inside the insulation right at the terminal block. It made contact sometimes, then didn't. Took me 8 hours total to find it. Anyone else ever get fooled by a hidden break like that?

Stuck on a weird door lock issue in a 90s building downtown

Last week, I was working on a bank of four elevators in that old brick tower on Main. The door locks on car 3 kept dropping out, but only when the car was at the 7th floor... checked the cam and roller alignment three times and it was fine. Anyone run into a ghost issue like this where the floor level itself seems to be the problem?

Unpopular opinion: That old timer in Cincinnati who swore by hand-filing governor contacts was onto something.

I was working on a 1970s Otis traction job with him about five years ago, and he spent a full hour showing me how to read the wear pattern on the contacts with a magnifying glass. He said, 'Kid, the machine tells you what it needs if you listen.' I thought it was just stubborn old ways, but after seeing three new units fail from poor contact alignment, I get it now. Anyone else run into a situation where an old method actually solved a new problem?

Showerthought: I bought a $500 digital inclinometer for a tricky job in an old building.

It was for setting up a new hydraulic elevator in a 1920s bank in St. Louis where nothing was plumb. The old ways with a bubble level and shims would have taken me two extra days. This tool paid for itself on that one job by getting the rails dead on. What's the most you've spent on a single tool that actually saved your skin?

Update: I got a 1980s Otis controller to talk to a modern laptop by using a $15 USB-to-serial adapter from the hardware store, not the $200 shop tool.

The old diagnostic port on this unit in a Boston apartment building was giving me gibberish until I manually set the baud rate to 9600 in the terminal software, so is this a legit fix or am I just asking for trouble down the line?

Am I the only one who sees guys not checking the governor rope tension during a 5-year?

I watched a crew in Tampa last month skip it entirely, and that's a fast track to a failed test. How do you make sure your team never misses a step like that?

Finally got the hang of adjusting those old Dover door operators

I was working on a 1970s building in St. Louis last Tuesday, and the doors on one car just wouldn't sync right. The close speed was way off, making the reopen safety kick in every time. After messing with the linkage for an hour, the super told me to check the cam follower arm, which was worn almost smooth. Swapped it out with a new one from the truck and tweaked the close speed pot just a quarter turn. Now it runs quiet as a mouse. Anyone else have a go-to fix for worn cam followers on those old models?

Tbh, I bought a cheap knockoff governor spring tester for $150 and it broke after two uses

I used to think the new safety code updates were just more paperwork, but a call I got last week changed my mind.

Got a service call for a 15 year old traction elevator in a downtown office building. The governor rope had worn through its sheave lining, but the old style safety didn't trip because the rope just rode up on the metal. The new code that requires those rope gripper monitors would have caught it way earlier. Saw the before and after of the sheave groove - it was a smooth, deep channel worn over years, not a sudden break. What's one code change you initially disagreed with that you've come around on?

Showerthought: I saw a 1990s traction elevator go from a 3-day repair to a 4-hour fix after we swapped the entire relay logic for a solid-state controller.

Got stuck for 6 hours on a weird door lock fault in a 90s Otis

The car kept getting stuck at the top floor with the doors open a crack. I checked the lock rollers, the cam, the clutch, everything. Turns out a tiny piece of the old lock bracket had cracked and was just barely catching the cam wrong. Found it after pulling the whole assembly apart. Anyone else ever find a weird hidden break like that?

My foreman said to always check the governor rope tension first on a noisy car. He was totally right!

I was on a call for a loud grinding sound in a downtown office building. I was about to start pulling the motor when I remembered his advice from a training session two years ago. I checked the governor rope and found it was way too loose, causing the sheave to chatter. Tightened it up and the noise was gone in five minutes. Has anyone else had a simple tip save them a ton of time on a tricky job?

PSA: An old timer in Philly told me my rope splice was 'too pretty' and it changed my whole approach.

He said, 'Grant, that splice will hold a beauty contest, but will it hold a car? You're burying too much tail and it's creating a stiff point.' I was so focused on making it look perfect from my apprenticeship days. Now I follow the exact length specs from the manufacturer's chart for that specific 5/8" rope, even if the taper looks a bit rougher. Anyone else get hung up on making things look a certain way before realizing function is king?

Had a hoistway door lock stick on a call in Omaha last Tuesday

It was a 20 story office building and the car kept getting stuck at the 14th floor. The lock roller was binding on the strike plate because someone had painted over it. I used a small file to clean off the paint from the contact points and a bit of dry lube on the roller pin. Has anyone else seen this happen after a building gets repainted?

Vent: Guys keep using the wrong grease on the governor sheaves

I've seen three jobs in the last month where someone packed the governor sheave bearings with regular lithium grease. That stuff gets stiff when it's cold and the governor needs to move free. I use a specific synthetic grease, like Mobilith SHC 220, for those parts. It stays smooth down to about negative 40. Had a call back for a false overspeed trip that was just frozen grease. What do you all use on your governors?

Just realized that $400 digital governor tester was a complete waste for my shop

Our building only has traction elevators from the 80s, and the thing can't even interface with the old relay logic. I'm back to using the manual tach and a stopwatch. Anyone else find modern diagnostic gear useless on older systems?