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The pumps we have are pre-2009, that was when changes were made on sleeves w/ small springs, these came apart and damaged the housing .We decided to replace instead of spending time and money on repairing and not knowing what we might have when finished.
Locating a pump was a task because most...
Have cat 3535 pulsating on one of my ww 1.0, holds pressure at 1100 PSI, hoses are all good. wondering if I have a unloader or a valve problem.. only at high pressure causing hoses to shake inside eq. room. Never had this problem on 3535 before. Any help greatly appreciated.