All of our injection pumps for White® tractors are disassembled, thoroughly cleaned and inspected. All worn out parts are replaced and the pumps are then reassembled with new gaskets. Pumps are tested for leaks, fuel delivery at low idle, high idle, full load, part load and starting. Any pump with automatic advance system has the advance set. As an extra step to guarantee you receive a quality pump, all pumps are tested with a special oil that will not varnish inside the pump.