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  1. #1
    Join Date
    Feb 2007
    Posts
    999

    Questions re: PMs

    In the past, when performing a 'winter' PM, the tech would apply a drop or two of oil to the shaft of the VS blower motor. Likewise, to the (bearing) of the inducer.

    The product manual states that the motors are sealed and require no lubrication.

    Last time, a tech came (new company) and dd not do this. I did not question him at the time.

    My questions are: is this practice harmful to sealed motors? Also, being that it has been done in the past, should I request that this be done, or not in the future?

    Thanks.

    Amp

  2. #2
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,046
    Quote Originally Posted by ampulman View Post
    In the past, when performing a 'winter' PM, the tech would apply a drop or two of oil to the shaft of the VS blower motor. Likewise, to the (bearing) of the inducer.

    The product manual states that the motors are sealed and require no lubrication.

    Last time, a tech came (new company) and dd not do this. I did not question him at the time.

    My questions are: is this practice harmful to sealed motors? Also, being that it has been done in the past, should I request that this be done, or not in the future?

    Thanks.

    Amp
    Should not be done. Someone has probably created a generic PM protocol telling there staff to lubricate all motors.

  3. #3
    Join Date
    Feb 2007
    Posts
    999
    Quote Originally Posted by second opinion View Post
    Should not be done. Someone has probably created a generic PM protocol telling there staff to lubricate all motors.
    You're right. At the time of the original PM, I questioned the tech and he said that the owner wants (all) the motors lubed. Could you comment on exactly what the effect of lubing them would be? Degrade the 'on board' lubricant, resulting in premature failure?

    Amp

  4. #4
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Its a sealed bearing. I don't think it would do any harm or benefit... not a couple drops. At worst it will attract fine dust and make a mess on the shaft. It's an open motor, but would take a LOT of oil to reach the motor housing and impact cooling of the windings.

  5. #5
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,046
    Quote Originally Posted by motoguy128 View Post
    Its a sealed bearing. I don't think it would do any harm or benefit... not a couple drops. At worst it will attract fine dust and make a mess on the shaft. It's an open motor, but would take a LOT of oil to reach the motor housing and impact cooling of the windings.
    And what that leads to is the condemning of a good motor " because the oil and dust indicates the seal on the motor is leaking" " you need to replace it right away, it's going to be hot/cold soon"

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