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If it is blowing at the same place it is evident that the pump chamber is not being pressed against the pump gasket mating surface enough to hold the gasket in place. The pump chamber retaining bolts become hard to turn on some pumps because of the aluminum threads becoming distorted. If you try to use a torque wrench on these bolts you are never going to get the pump chamber tight against the housing because you are going to get a reading of the proper torque before the chamber is tight enough against the housing. I would use a bottoming thread tap to chase the threads of the pump housing so that the bolts will have a better chance of holding the chambers down as they should. Also look closely at the threads of the bolts and if they look distorted either replace them with new bolts or chase the threads with a thread die to reshape them. What in the world are you pressureizing the pump to 1700 PSI for anyway????? If it will lift the load why???? I would also replace the pressure relief valve. Someone may have tampered with it and it may not be breaking when it should. You can split the housing on that pump if too much pressure is applied. That is a positive displacement pump and if the relief valve does not break or a gasket blow the next thing is a broken pump housing that can not be repaired. Zane
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