74 Operator’s Manual Vehicle Maintenance CXU, CHU, GU, TD, MRU and LEU Fuel/Water Separator MACK MP Engines The primary fuel filter on MACK MP engines includes a plastic water separator bowl with an integral water-in-fuel sensor and a drain assembly. A warning lamp on the instrument panel illuminates when water is detected in the fuel. When the lamp illuminates, drain the water from the separator by opening the drain valve and allowing the water to drain from the bowl into a suitable container. When fuel begins to drain, close the valve and tighten to 0.655 Nm (5 lb-in). Dispose of the drained water/fuel in an environmentally safe manner.
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Water Separator Drain Valve MACK MP Engines
Note: DO NOT drain the water separator bowl while the engine is running.
