Jreager, the only few things I may suggest is to measure the groove the O-ring fits into, OD, ID, and cross sectional diameter of the O-ring itself and go to a hydraulic/pnuematic repair shop and present them with the same info to match the same size. Get a BUNA-N seal material. Any shop making P/S, A/c, etc. hoses should be able to help. If no help, e-mail me and I'll try.
The other sggestion, after install of O-ring, fill the reservior with oil, whatever the manual recomends, then after bleeding all the air out, retract the rods, top off the fluid, then install the plug to the reservior. This way, when the cylinders are extended, it will pull a vacuum on the reservior,thus, saving the O-ring. I bleed the cylinders by disconnecting them from the top, having an assistant work the switch, I hold the cylinders in hand and upright the end being used to extract the air, several times.
May I offer the suggestion, after bleeding, and install, and the season is over for drop tops, disconnect the cylinders from the frame and actually retract the cylinders. This places the cylinder rod inside the cylinder protecting it from rusting over the winter so as it doesn't tear the rod seal next spring. Use emery paper to clean/polish the rod.
Try Wyatt Seals on Broad Street(?) in Richmond.
[This message has been edited by Everett#2390 (edited 09-20-2002).]