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- Dec 3, 2015
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- Banner Springs Tennessee

I've seen a bad bearing on the drum cause the drum to tilt and cut into the pump. If it tilted enough, it could push the arm down into the pump body. Overly tight chain is the cause of most of these things.Hey Wandy
What happens that makes the arm on a worm gear hit the oil pump and break it ?
The bearing ?
I cleaned that oil pump off good and I can see where the arm knicked the pump.