Don't have any on service, but be aware there was an safety alert on these units. The step track weldmont can be defective allowing lateral movement.

I'm with Boa, Kone has been going around fixing them all over. I believe it was a lawsuit. Also the lower carriage likes to get hung up, not putting tension on the chains. As far as the step chain replacement, I don't have a write up but I did it once. You pretty much take the upper end apart above the stepband, including the walk-on not the glass though, and install the chain from top down 5 axles at a time. Make sure you hold the lower end of the chain up with 2 ratchet straps so it doesn't travel down the incline. Break chain, making sure not to let it come off the bull gear, remove old, install new, re-attach, rotate unit and repeat. Work safe.

Thanks You Guys

It not that hard of job if your a real escalator mechanic.
Please be careful with information we give out.
The Chicago Transit Authority has eletricians doing escalator work, they are clueless and very dangerous. I heard they post here on blog.