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The set screws are 5mm allen heads

7.5" wall to outside of rail. You're welcome AH

Yes, we found that too

I’m glad you enjoyed the video. It was pretty much a trial and error on figuring out how to dismantle it but this was the first time I ever worked on a lift like this. It’s kind of crazy that they put the set screws in the place that they did but hopefully this video helps people realize how to dismantle the rails and not try to beat the crap out of them to get them to separate. I was able to Ship the entire unit to my fathers home in Hawaii and then reinstalled everything and the programming was a bit tricky but there are resources out there with detailed instructions how to reprogram the lift.

@@pumpbottlemisters Hitting the crap out of it is exactly what I was doing. The rubber mallet left no marks, but it also didn't budge it a millimetre. I dismantled it last night 9 (13 stairs) in under 2 hours. I left the chair on a section of rail for the new owner. Hooly dooly, that thing is HEAVY!

Glad you got it done. Dismantling is the easy part. Installation and programming is a whole new kind of headache. ;-)

@@pumpbottlemisters A headache for someone else!

I think he said that's the small plastic screw at 2:11 th-cam.com/video/K1Yt8kBZ-dI/w-d-xo.html. I'm doing this job tomorrow.

@@rottingrat That's it. I watched the video 5 times and didn't see it. Thanks.

Sorry for not replying earlier but yes there is a small plastic screw that needs to come out and then the seat can slide directly upward it took me a little while to figure that out as well

@@pumpbottlemisters When I pulled the seat up, the plastic around the top of the hole started to come up with it and caused the switch it was holding to pop out of its location. It began to crack the plastic. It could all be put back, but was close to being a bigger headache. I don't know why it stuck to the seat shaft, but it's something to look out for.

@@pumpbottlemisters I have a slightly different seat, probably just a different iteration of the same one you show. Mine swivels on the front corner, not a center post. It appears there's a plate across the top of the battery base unit with four bolts that hold it in place. I'm nearly done with my "uninstall" -- just waiting for my son to come over to steady the chair/rail piece while I take out the last 3 screws. I'd hate for the chair to crash through the upstairs railing and fall 10 feet to the foyer below. :( Thank you SO MUCH for this informative video! I did number all my pieces sequentially from bottom to top before I started disassembly, so it would be a little easier to reassemble, if needed.

Leave it on a short rail if you can at all. It was difficult to get it back on the rail. We found we had to loosen bolts on a round plate that holds a couple of rollers in order to get the rail through. Once it was through, we re-tightened them and it was fine. To get it back on the rail, we also had to reset the over speed brake which had triggered in the removal process. I have instructions for programming a T565 which is the model my 2018 chair should have, but mine won't enter the P1 mode when I hold down the three footrest safety switches. It just keeps blinking E1 when I do that. Did you learn any tricks or find good instructions?

I will look again for my programming instructions that I used. It was a bit confusing but I was ably to work thru them. It took me about 5 or 6 try’s to get the new programming to take. Then while I was back in CA the 2 new remotes arrived and I walked my 80 year old dad thru the process to delete the old remote and reprogram the 2 new remotes and the the frigging Acorn reverted back to its original programming. He went half the way down the stairs and then it started tilting like it was coming to a landing and he about fell off. Needless to say we had to reprogram the lift again and ever since then it has been working great.

@@steveselby2694 could you share your programming instructions? I recently got a used lift and think the first thing I need is new batteries then reprogramming

@@steveselby2694 I just googled "acorn 180 reprogramming" which led me to the same document that came with the batteries. I just kept trying but not sure what I was doing wrong - the instructions I got with the batteries were not 100% clear.

@@brianleung1105 try the links at this page. Just be careful because the website with the instructions will try to put a lot of crap on your computer. Don't accept anything but the instruction document. okprops.com/how-to-problem-solve-an-acorn-180-or-bison-80-stairlift/ To enter programing mode on the older version, you hold in all three safety switches on that footrest. On the newer version, you in the two safety switches that run from the seat to the footrest and the bottom switch on the footrest.