Ordered a new seal and soaked it in the same aw32 hydraulic oil that will be in the cylinder for the last 2 days and it's still hard as a rock. The cylinder opening has a generous starting taper but no way this is going in without what seems like would be the kind of force that would damage it. I have a piston ring compressor that size but no way would it work. The bad one that came out was nice and flexible. Am I just being too impatient needing a longer soak or what? Seal is 1/4," thick 6" od with around 1" flange...