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Engine check valves
rain and sunlight
Navistar DT444E 7
This kit contains 8 new spool valves ready to be installed
Diesel fuel is pumped up via the lift pump to feed the CP4 lubricating the crankcase area of the pump first
Pressure Switch + Diode Retrofit Engine:6 Engine check valvesOriginal V3 units on the road have a design flaw that allows the pressure switch to take the bullet for an electromagnetic pulse generated during pump shut down. This retro fit solves this problem by placing a quenching diode over the stock diesel pump. As your pressure switch has been most likely weakened by constant power spikes shunted through it, this solution includes a new pressure 55psi switch (3 wire), a quenching diode, and additional T taps
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