Sunday, November 18, 2018

Elevator independent service - Get that couch in!



A useful feature on newer elevator systems is called “independent service” and can be used to assist move in and move outs or people moving large objects.  I was at a building this week and watched 3 guys ram a couch in the elevator, they worked on getting this couch in there for at least 20 minutes with the door closing on the couch every 20 seconds.  I just so happened to be at the building doing engineering on a modernization.  Good news, they got the couch in and they finally got it out of the building with out breaking the elevator. The last time we blogged about this was in 2014 so it is about time for a update.


How to use independent service - To use the independent service feature is very simple.  A person puts the key in the key switch, turn to the on position.  When the key is in the on position the doors will remain open and the elevator will not take any hall calls.  The person in the elevator has complete control of the elevator system.  When the person is ready to have the elevator go to the desired floor they hold down the door close button, the door will close and the elevator will go to the desired floor.  The feature prevents the door from ramming the object someone is trying to get in the elevator and prevents hall calls from taking the elevator away from the movers.

Where is the Independent service key switch – Sometimes this key switch is above the elevator buttons labeled “Independent Service” and other times it is behind a locked cabinet and may be a key switch or have a toggle switch.

Do all elevators have independent service – No, newer elevator systems will have this feature.  If you would like to know if you do, call your elevator contractor.  You can always take a picture of your car operating panel, send it to your account rep and they can let you know.

How do I get keys and training – Your elevator contractor can supply you with keys and training for this feature.

If a building is better educated on how to use the independent service feature on the elevator system you most probably will get fewer calls that the elevator is broken during moves.   It is understood that building occupants will not always pay attention to the request that you must use the independent service feature but, if it saves a few service calls a year, the building will have fewer bills to pay the elevator contractor.  As a contractor we are always more than happy to come out and show you how this feature on the elevator system works

If you have any questions or would like additional information feel free to contact me at CraigZ@colleyelevator.com or 630-766-7230 ext. 107.

Also check us out on Instagram @Colleyelevator see what we have been up to.

Sunday, November 4, 2018

Elevator cylinder failure – Deterioration of cylinder metal

Colley Elevator has been forever known for their cylinder work.  While 20%-30% of our modernization work is traction, currently we still do more hydraulic work than any company in the Chicago area.  So we have seen, and still see a lot of cylinder failures and replace a lot of cylinders and run into a lot of unusual conditions.

We have two projects going on right now that surprised me with the amount of corrosion on the elevator cylinders.  One of these elevator’s was running.  The elevator that was running was not under a maintenance contract with Colley Elevator nor did we have anything to do with it prior to replacing their cylinder.

The first building was a building that had their elevator sleeved a long time ago[assuming from the welds & environment].  The cylinder leak came back recently and they need to replace the whole cylinder this time.

[What the cylinder looks like from lowest landing hoistway sill]


[Upon further investigation we see the sleeve closer]

[This is just one section of the outer sleeve of the cylinder after we pulled it out]

[Another section of the outer sleeve of the cylinder after we pulled it out]

[Another section of the outer sleeve of the cylinder after we pulled it out]

The second building is a building that had a running elevator, it was replacing the cylinder because it had a AHJ inspection over a year ago that failed but for some reason let the car run.  

[What the cylinder looks like from lowest landing hoistway sill]

[Deterioration of safety bulkhead]

[Deterioration of pipe on walls]

[Deterioration of pipe on walls]

If you have any questions or would like additional information feel free to contact me at CraigZ@colleyelevator.com or 630-766-7230 ext. 107.

Also check us out on Instagram @Colleyelevator see what we have been up to.