If the oil in your pump has a slightly milky-looking appearance, it is probably time to replace the diaphragms. You should never operate the unit with oil and spray mixture because it will cause irreparable damage to the unit. This repair kit provides everything you need to restore functionality to a damaged pump and allow you to continue running your operation. The kit includes valve assemblies with o-rings, diaphragm washers, diaphragm bolts, an accumulator diaphragm, and piston diaphragms.