Anyone thrifty enough to know where to get just the cup seal for the ram on a floor Jack? Click to view attachment Thanks

Try Grainger or a hydraulic supplies house. What are the measurements?

ID: 1.2in-32mmish
OD: 1.5in-40mmish
Old 3-1/2ton powerbuilt jack model#647530

No expert on hydraulic stuff here but Grainger has these for replacement single and double acting hydraulic ram seals. Sizes seem possibly good and cost is $6-$8 bucks. Thinking these seals (Piston T-Seal, Piston Crown Seal) are just a better type of seal then the original that was used? Have to also figure out if I would need a single or double acting seal? The T-Seal says both while the Crown Seal mentions about double acting hydraulic cylinders only? Can’t find a seal on the Grainger site that looks like the original.

No expert on hydraulic stuff here but Grainger has these for replacement single and double acting hydraulic ram seals. Sizes seem possibly good and cost is $6-$8 bucks. Thinking these seals (Piston T-Seal, Piston Crown Seal) are just a better type of seal then the original that was used? Have to also figure out if I would need a single or double acting seal? The T-Seal says both while the Crown Seal mentions about double acting hydraulic cylinders only? Can’t find a seal on the Grainger site that looks like the original the one in the picture below that has a O-Ring inside the plastic ring.[attachmentid=814649Click to view attachment