For this article we are going to go through the process of replacing a cylinder on a two-post lift. Whether you have a rotary 2 post lift or a challenger 2 post lift or even and a bendpak left this how 2 should work well for all of the different types so here we go. I will tell you in advance that this will be a longer process to document because replacing a cylinder is a longer job than any of the other ones that I have written about so far. So with that in mind there will probably be a few articles covering the same topic. So a cylinder is what we will be working on and if you do not know what a cylinder is you can look on your rotary 2 post lifts parts diagram to get a visual idea of what it looks like and what part you should be looking for on your lift. and we are able to rebuild some cylinders if you are having troubles with that. But also sometimes you might just want to buy a new one because if it is that damage there is not much someone can do for rebuilding it. So based on the rotary 2 post lifts parts diagram we know that the cylinder is a part of the lift that is connected to the carriage and it is what actually pushes the lift up. they are hydraulic cylinders so they work by using fluid to push them up. So the first step in replacing the cylinder is to First figure out which cylinder it is that needs replaced which if you we’re looking at The Rotary 2 post lifts parts diagram and ordering parts for it you probably know which cylinder is having issues but this is just a part of our process so bear with me on this one. so to figure out which one needs replaced it’ll usually be the cylinder that is either stuck in the air or it is the one that is making a big mess. As I said before they are hydraulic cylinders and they have hydraulic fluid inside of them. And as you can see in the rotary 2 post lifts parts diagram that the fluid is inside of the cylinder. Okay now you need to figure out which style the cylinder is by looking at it and you will know this also if you have read through the rotary 2 post lifts parts diagram because it tells you exactly which cylinder it is in which cylinder it needs in the spec sheet. but there are a different a couple different types and you can figure it out you should ask yourself these questions. Does the cylinder hang from the top of the column or does the cylinder push up from the base plate of the column? And if those questions don’t really make sense to you then you can always give us a call and we can help you figure out which kind it is. It can be kind of difficult to explain it in this form of instruction. So if you need some more assistance on figuring out which type it is just let us know. And we would be more than delighted to help you out with that. But basically the main question for figuring that out is whether the the cylinder pushes The Carriage up from the base of the column or just the cylinder pull the carriage up from the top of the column so those are kind of the the two different types. So if you have the type where it pushes The Carriage up from the base of the column here is what you will want to do next. If you have the other type just hang tight for a second as we go through this set of instructions and then we will eventually get to the instructions for your type of cylinder so you can kind of skipped through this part if you need to. Okay so for the cylinders that the cylinder pushes The Carriage up from the base of the column first you need to find a hose and wash out the bottom of the column and you just want to spray water into it to rinse it all out and make sure that’s none of it is going to be staying in there because if any debris is in there it can cause some issues for you replacing that cylinder. once you have gotten all of the gunk out of the bottom of the column using a hose then you want to push all the water that you spray to clean that off you want to push that all to the drain so it gets all cleaned up and drive otherwise you’ll have a quite a mess on your hands. Next you want to remove the bolt that holds the cylinder to the carriage and usually this will be on the top of the cylinder or on the top of the carriage. If you’re having a hard time figuring out where it is I would recommend the rotary 2 post lifts parts diagram. If you read through that it will give you a diagram that shows you where those folks will be. Sometimes they can be in different spots depending on which lifts you have so that resource will be the most helpful to you. so yep once you remove the bolts which by the way you will want to use a tool to help you get those off and you can obviously decide which tool you want to use for that I would recommend using an impact or a wrench of some sort. If you can get those bolts off with your bare hands that either means that you are an animal or it means that they were like just barely hanging on there so next time make sure that those are nice and tight cuz you should not be able to remove those with just your hands.