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Man, you guys are on the ball. Thanks for the advise. I will try to find a hydraulic shop somewhere close to get the orings. The spacer/backup is located between the u-cup and a copper colored ring/spacer. All of these are held in place by a snap-ring. I would try to add a picture, but it...

The ucup on my jack has a flat bottom and a flat plastic backup. I found a supplier and ordered the ucup ($17.00). The two white plastic or nylon backups that were under, or on top of, the orings on the plunger were solid. I removed them during the teardown, but will have to reuse them. Can...

I am attempting to rebuild my Shinn Fu model g-181 2 1/4 ton floor jack and am currently looking for the seals to complete this project. The main seal, on the bottom of the ram, has a crack on two sides. This seal is held in place by a snap ring and has a size of 40x22x12 on the bottom of the...