Harman XXV distribution blower

civilkane Posted By civilkane, Apr 9, 2019 at 8:09 PM

  1. civilkane

    civilkane
    New Member 2.
    NULL
    

    Apr 9, 2019
    1
    0
    Loc:
    Washinton state
    Upon removal and dismantling the distribution blower after experiencing no flow and squealing, i discovered that the shaft to which the blower wheels is attached is not secured to the rotor. Further, there is evidence of high temperature coloration on the shaft. The motor runs, but fans are still. How is the shaft supposed to be connected to thevcd rotor? Motor appears competent.
    By the way, I have replacement on the way but am curious as to how common this is.
     
  2. Ssyko

    Ssyko
    Minister of Fire 2.
    NULL
    

    Nov 6, 2017
    2,190
    526
    Loc:
    Lorraine NY
    There is usually set screw that tightens up the fan balde to the shaft
     
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  3. bob bare

    bob bare
    Minister of Fire 2.
    NULL
    

    Oct 31, 2013
    2,939
    613
    Loc:
    park county montana
    The original blower(a tangential blower) would have been an EBM/PAPST.the 2 blower "wheels" would be a press fit onto the motor shaft.If they "spun out",loosened up,could only be from 2 things,the outer bushings(which are oilable),seized,or long period of time with the fins on the blower wheels creating excessive drag.Problems like yours usually come from having cats or dogs,and not vacuuming the blower enough.
     
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