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Old 07-17-2008, 05:15 PM
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Since they live in oil, it's unusual for one to "lock-up". As others have pointed out you have ingested something. I recently pulled a pan off an early Bronco that had that happen...twisted the drive hex like a piece of licorice. he had just had a new pump installed a few months earlier by another shop and when we removed it it was jammed solid. I pulled it down and discovered that the original pump installer had been careless when scraping the old gasket( between the pick-tube and pump) and had lost a small piece of the gasket into pick-up tube( most likely). After a few months operation it had finally been drawn into the pump and was smashed between the rotor and it's outer impeller. After knocking the pump apart and removing the minute gasket piece the pump rotates freely. I won't use the pump, but always like to understand what generates a failure. They are very tight tolerance and it doesn't take much to lock them.
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