Feuling Oil Pump Pressure Test Tool For Harley Bench test the Feuling Milwaukee Eight oil pumps. Cycle the pressure relief valve, evaluating its functionality and ensuring that it seats, seals, and moves smoothly. Any leakage at the relief valve will result in a decrease in oil pressure. Features: Proper relief valve seal will insure good hot idle oil psi and reduce oiling system cavitation and related pressure issues Fits Feuling oil and water cooled oil pumps 7018 / 7019 / 7020 / 7021 Made in the USA