lyle.coop

My cascasde dropper post is stuck in the down position. It was slow to go down on a few sections on my last ride, but operational. Near the end of the ride, I put it in the down position and it refuses to come back up now.

Any ideas on what can be done to repair it?

Thanks

biker128pedal

Mine did the same thing. I contacted PNW. They were helpful and started a replacement process. When I pulled it out the lower assembly collar was loose. I tightened it and all was well. So pull and inspect first. Then contact PNW.

Kapusta

Did you try loosening the seat collar clamp? It can sometimes bind the post.

Also, are you sure then cable is not in need of tightening?

Not sure how old yours is, but they sometimes need cleaning and lubing.

79pmooney

Lube. My instant first thought. Any water that gets on that post is going to do what water does, its damnedest to weasel inside and stay there to corrode whatever it can. I'd consider talking to the manufacturer to ensure no lube goes where it doesn't belong and prevent the stop to the slide down from happening. ("I lubed the post. It slid down to the bottom bracket and I rode home with my head between my knees." That image might be with me a while!)

Kapusta

Just to be clear, I am talking about cleaning and lubing the internal parts of the post. There are instruction in the PNW site for that.

As far as the outside, on one of my Cascades, I need to use carbon paste for the install. Otherwise, in order for the whole post to stay put, the clamp needs to be too tight for the inner shaft to come up on its own when you want to raise the seat.

As a temporary fix, I’ve used stanchion lube (finish line) to get the post working again.

lyle.coop

I took the post apart and found the internal mechanism is controlled by a piece of string. Literally a string or yarn whatever you want to call it. It had broken off from some attachment point further up the post. I called PNW. They repaired it and sent it back to me.