72 Operator’s Manual Vehicle Maintenance CXU, CHU, GU, TD, MRU and LEU Priming the Fuel System MACK MP Engines On MACK MP engines, the priming pump is located on the primary fuel filter mounting adapter. Prime the fuel system as follows:
DANGER Before working on or inspecting a vehicle, apply the parking brakes, place the transmission in neutral and block the wheels to prevent the vehicle from moving. Failure to do so can result in unexpected vehicle movement and cause severe personal injury or death.
WARNING DO NOT work near the fan while the engine is running. The engine fan can engage at any time without warning, resulting in serious injury. Before turning the ignition on, make sure that no one is near the fan.
DANGER To avoid potential fire hazard, do not service any part of the fuel system while smoking, or in the presence of flames, sparks or hot surfaces. Do not service the fuel system while the engine is running. Failure to follow these precautions can result in a fire. To guard against burns from direct contact with hot fuel, wear adequate protective clothing (face shield, heavy gloves, apron, etc.) when working on a hot engine. Note: There are NO bleed nipples that must be opened in order to prime the fuel system.
