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No you should be fine, but if the old pump your are changing was leaking diesel into the crank case then I would definitely change the oil and filter. If your oil level hasn't been rising by itself your probably good. Just try to keep any dirt and old gasket material from entering the crank case when you pull it and clean up the surface.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.