Dry vacuum pumps typically last between 300 and 400 hours. On the high-end, they can last for 600 hours. That's roughly 6 years. However, it's more common that a vacuum pump needs to be replaced every 3-4 years. Vacuum pumps can fail for several reasons, including solvent contamination, foreign object ingestion, drive misalignment, heat and altitude stress, over-speed, rapid acceleration, reverse rotation, shock and awe, pump lugging, and normal wear.