Hydraulic Ram Seal replacement, Bobcat 630

I go over how to replace the hydraulic ram seals in a skid loader. This old 80's Bobcat or Melrose 630 needed seals so I show how to replace the ram seals in it.
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Automotive technician

[@TheToolmanTim]

I just replaced the lift cylinder seals on my 530. I braced my arms up on some 2x6s going from the floor up to the arms. I was shocked when I pulled the pin on my first cylinder to watch my Bobcat tip back until the rear pan hit the floor and my front wheels were about a foot off the ground. I thought about the physics of that for a couple days before I could understand why it did that. Sure wish I had known about that before I started. No harm done, but it was a bit of a scare. Also, it was good that you mentioned the ring on that inner collar shrinks back down over time. I was concerned about how loose that ring was after I had stretched it to get it in place. Had I tried to reinstall the ram without letting the ring shrink back down, I would have ruined it. Great instructional video!

[@CrazedPerformanceRepair]

It sure is crazy how they lift the front like that. I was in same state of mine the first time I did that too lol. Had to stop and think for a bit.

[@chuckram2188]

Often times I will use lithium grease to move seals into place, but that's for machine applications.

[@CrazedPerformanceRepair]

Yeah, only things I use lithium grease for is door hinges and such. I don't find as much use for it as one would think I guess.

[@mikewilson6906]

@ 8:45 its called a backup seal

[@chuckhoebler7675]

Do you know if that cylinder has a 25.9" stroke? Here's why. I have a damaged lift cylinder on a bobcat 720. I have been looking for a replacement with no luck. I know the cylinders are interchangeable on bobcat 700, 720, 721, and 722, and i found out that the 620 may be interchangeable. I found a fire damaged 630 and the owner may be willing to sell that cylinder. It's been impossible to find specs but I have the manual for mine that list the rod and bore diameters (1.25" and 2") and the stroke (25.9").
The rod on yours looks like its identical, but I can't tell without an exact measurement. Any chance you measured the length or have the specs?

[@CrazedPerformanceRepair]

I never measured it and don't have the specs. I did find out it appears to be a 1982ish 630 though. I could probably measure length on it though if need be.