Heres the tech tip I wrote on overhauling them.I spent $50 through
ABS for my kit but it did not come with the control valve diaphragm or the large power piston seal. I already had a control valve diaphragm, but the old one still looked fine with no degredation. The power piston seal was originally a leather seal, but newer ones had rubber and rope seals and those hold up really well. I know you can also get the parts through
BSC but you have to argue with them to get a kit. They dont like to sell kits, probably because they make more money with a trade in or a rebuild. A fully stocked kit will run around $100.
I dont know what to do about adding fluid to the power piston cannister since yours doesnt have a plug. Id probably pull the casing off and add about two ounces of mineral oil, no more. You DO NOT want to use any lubricant that is petroleum based. A thin synthetic (corn based or other) oil would work also.
Hope that helps. If not keep firing questions off!
Jeff
