were they new units? or remanufactured units? How are they failing? how do you know they are bad?
3 going bad - something else is going on, thats not normal. Of course if they are rebuilt units, the explanation could be as simple as the rebuilder is making the same mistake over and over again, or the installer putting to much tension on the belt!
regardless, throwing pumps at the result time after time will not solve the problem! isolate the problem, fix it, then put on a new pump!
Carl Johansson
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