I did not need to really do any of this just to replace the top cylinder seal, I was preparing to remove the entire cylinder. I will add, I had a high beam (35"), a come-a-long, various chains and straps to help with lifting and aligning the mast sections and or extending the cylinder during this. I've always looked at the load and never at the mast action and components. Today after lifting it there were several "Ah ha" moments. The most confusing thing of all of this is that after having this lift for 15 years I never actually looked at how the mast works. All is good, the seal part is no problem, its just rigging everything up to remove or support heavy components that is the trick. I do have the ceiling height to play around with and a couple of pals with lifts. Again, clever chaining etc can get the cylinder out and or the whole mast for service. Unfortunately my pals within range don't have triple lifts to extend this thing all the way. Since I've had a fresh look at actually how the mast lifts and what's involved, much easier. It's not a geyser, but I'll have to replace all the seals which is fine. The next upside seal is leaking, most likely from all the twisting and banging around to replace the upper seal. If the seal that shattered like glass when I tapped it out is an indicator of what the other seals look like. I've been in "Clark Lake" for a month or so, learned a bunch, been beaten up, etc. ![]() After it is all done bleed the air out of the cylinder up top at the bleeder and walk out saying to yourself "that's the last one of them I'm doing"!!Īs it goes, the condition of the other seals became kind of a joke here. It is handy to have someone help you hold the shafts up as you remove the foot, C, old seals, new seals. Note that gravity will want to make the shafts drop so be aware. The bigger one is like the ones on top where you have to use or fabricate an installation tool to prevent damaging the seal. The small one is easy because the gland nut the holds it is threaded on the outside of the shaft so it will go in without any threads rubbing it. Remove the eight 12 point bolts that hold C on and remove part C. Remove the snap ring under part C that holds it to the cylinder. Lift the small chrome shaft and remove the snap ring and the 3 keys that hold that lower foot on. Remove the two 3/8" bolts and nuts on the sides of D that hold cylinder in place. They are recessed up in there so you need a socket. Remove the four 1/4" head 12 point bolts that hold the manifold on the very bottom. That will allow a lot of the oil to drain back to the tank before disassembly. You can strap the lever with a bungee and give it a few minutes. If you want to prevent a massive oil spill you can remove the bleeder plug on the top of the cylinder and push the lever to down position. Now chain the carriage to the mast which will be about at 6' high. Lower the carriage until the channels hit the the 4X4 supports. Take a 4' length of 4X4 and place it inside the center channel so it will support the inner most channel. Take a 2' length of 4X4 and place it inside the outer channel so that it will support the center channel. Lift the carriage so it is about 8' high. Chock the wheels so the machine can't roll. Are there any other parts to remove before this lifts out? The cylinder is not lifting, although it feels like its just sitting in a cup, it moves around but it isn't lifting out. I'm lifting the cylinder from the top, I placed the upper holder back on there to lift from. Removed the two side bolts from the lower holder, the ones that spin because there is an impossible to get to nut on the inside. Removed 6 bolts from lower front plate (4 are 12pt, 2 are allen). ![]() Remove the block at the top of the lift that holds the top of the cylinder in place. ![]() In attempting to remove the cylinder I've performed these steps. It is a three stage lift with a telescoping cylinder. I have a Clark EC500-25E lift that has the top seal fail, creating a geyser. To see the photo go to I looked at the recent C500 thread that mentioned quite a bit of this but I'm not having any luck with mine. It seems that I can't upload a picture here.
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