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I’m working on a 98 mule kaf620. The fuel pump failed. It was making a loud clicking noise and would not accelerate. I replaced it with the cheapest pump I could find on amazon. It failed after a few days. We bought another pump from fuel pump factory and installed it. It began leaking from the seam in the body after about 10 minutes. I contacted them and they sent another new pump. After installing it, same thing; leaking at the seam of the pump. I’m not sure how to move forward. Does this pump have some sort of internal bypass? Being an electric pump, it cannot run all of the time. What am I missing? Any help would really be appreciated, as a grandmother uses this to feed her cattle and is using a red wagon until it is fixed.