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What will happen if ???

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by allFIREDup, Oct 6, 2012.

  1. allFIREDup

    allFIREDup Member

    Oct 24, 2011
    Central NH
    wondering if anyone has run the combustion blower on a Harman 43 without the external fan blade? The external fan blade seems to be the culprit for noise. I know it's there to move heat away from the motor but will it really cook the motor if it's removed?

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  2. tjnamtiw

    tjnamtiw Minister of Fire

    Mar 9, 2009
    North Georgia
    It's there for a reason. :) My Quads have the external fan also, but some people have used a replacement motor without the external fan. Of course, the two motors are built differently to handle the heat, I suppose. IMHO, do not take off what the manufacturer put on. If they felt that it needed a fan, then they must have realized that the motor frame couldn't handle the heat without help.
  3. smwilliamson

    smwilliamson Minister of Fire

    Dec 28, 2009
    Southcoast, MA
    its not the fan...its the outer bearing. If it is the fan...then it's tinging and you should be able to bend the fins back center to quiet it down. or perhaps clean out the fan and free up the dust bunnies. FYI you aint gonna remove that fan without wrecking the motor....you need bearing pullers and other such manufacturing equipment ....unless you are a small motor tech and have access to some industrial criping and pulling tools. I'd stay away from that ...seems easy until you have to put it back together.

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