Review on 💪 Enhanced Performance: OTC 4020 Air Hydraulic Pump - Next-Level Efficiency and Power by Scott Channell

Same pump as SPX but different label. The guts may be different, but I doubt it. I bought this to replace my SPX but I was able to get my SPX to work so I returned it unused. They say they're serviceable, but for the price of the parts, it's better to swap them out or see if you can get them working with something simple. The main piston has frozen over from sitting for a long time. I tried lubricating through the air intake but couldn't get enough fluid to release it. At the end the piston disassembled and lubricated. It wasn't as much as I thought it would be, but it was REALLY dirty.