BARREL O-RING QTY REQ'D 1 1 1 1 1 1 1 1 1 1 1 1 1 * When repairing the release valve, look on the top of the pump oil reservoir tank. If "REV.C" is stenciled on the tank, use the REV.C repair parts. In either case there will be two extra parts in the kit to be ...