Meter actuator part number RX, PX

[Bengy88]

Not 100% sure about the px, the Rx is a reman unit, the part number without the suffix is a brand new unit. Usually these timing and metering actuators start giving issues or are beginning to wear way before 1.3 million. Usually by 700,000 they start getting excessive side to side play or a “step” in them when you move the plunger in and out. I’ve also never seen any Cummins make it to 1.3 million without having to pull at least one injector….. especially an 870 or 871. These engines are known for leaky injectors that’s why there are so many instructionals and videos floating on the forum about them.