Gary Hurley made up some o-ring kits, you might wanna shoot him an email and get a kit. Also after going through the Disco pump I have been using I decided to try some Mac1 secret sauce as a pump lube for the o-rings and sliding surfaces. The silicon grease recommended works good but the secret sauce is magic so far in my newly rebuilt pump. Basically the pump disassembly is fairly intuitive if you are mechanicly inclined. Start by undoing the set screw that holds the air inlet collar on right above the base. The set screw is under the air intake filter. Slide the collar up and then you can easily unscrew the pump from the base with a wrench on the brass fitting under that collar. Then its basically taking a wrench to the other brass fittings to disassemble it rest of the way. Be carefull not to nick any of the steel surfaces with the wrench. Dont lose the little check ball in one of the valves. A screw driver can be used to remove the circlip that holds the piece in the top valve. Use non chlorinated brake kleen to clean things carb cleaner will remove paint. USe silicon grease, found at plumbing supplies at lowes,home depot, or any hardware store. And then give all sliding areas a shot of some secret sauce and you will be surprised at how well it works. Gary's O-ring kit is a god send to people wanting to rebuild their Disco pumps. In fact I wouldnt mind starting a pump rebuild side business hehe.
John
The 850 Resource
