How do you replace high pressure oil pump on 2001 f550 with 7.3 diesel?

To replace the high-pressure oil pump on a 2001 Ford F-550 with a 7.3L diesel engine, first disconnect the battery and drain the engine oil. Remove the intake manifold to access the pump, then disconnect the necessary electrical connectors and oil lines. Unbolt the high-pressure oil pump from its mounting location and replace it with the new unit, ensuring all seals and gaskets are properly installed. Finally, reassemble everything, refill the engine oil, and reconnect the battery before starting the engine.