I have an older Enerpac 5-ton flat cylinder, 5/8" stroke, 1-3/8" height when closed. It's very handy but it's been leaking so bad as to be useless. I tore it down today and at the bottom of the plunger is an oil seal, .750" ID 1.125" OD, no springs at all, open on the bottom so pressure will tend to spread the OD tighter. I believe it is made of Viton.
I can not find any parts for this cylinder on Enerpac's Web site. Can I just buy any old oil seal (i.e. go to an industrial supplier and match it up)? I think Enerpac obsoleted this one a long time ago.
Grant Erwin Kirkland, Washington