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Thread: Rooftop AC bearing

  1. #1

    Default Rooftop AC bearing

    08 Marathon. RTU screams on startup. I pulled cover and when I spin the fan it growls bad. Feels like a bad bearing. Has anyone replaced this? If so, what did you do? Advice appreciated.
    Tony and Jenny Conder
    Abilene, Texas
    - - - - - - - - - - -
    2008 Marathon D/S XLII
    2017 RAM 1500 4x4

  2. #2
    Join Date
    Apr 2018
    Location
    Crossville
    Posts
    260

    Default

    Is it an 2008 original?
    Les Stallings
    Crossville TN
    2006 Country Coach XLII

  3. #3
    Join Date
    May 2012
    Location
    Beverly Hills
    Posts
    4,535

    Default

    Tony,

    The outside fan motor should be readily available. Get the rubber mounts too while the motor is out. Make sure the fan is still good. It's pretty common for them to eventually get loose at the shaft.


    Gil and Durlene
    2003 H-3 Hoffman Conversion

  4. #4

    Default

    Repairs complete. This was a Royal PIA. The motors needed to be replaced. The motors are obsolete. At Marathon’s direction I found some for sale on eBay. After swapping motors out I found that the shaft of the motor did not come threaded so there was no way to fasten the exhaust fan to the shaft. I dug around and found an old tap that I could use to thread the shaft. That was successful. I swapped out the capacitors while I was in there. So for $340 in parts and a significant amount of frustration, my wife and our traveling zoo are once again cool and comfortable. Oh, and it is much quieter now. If you think you may need this repair in the future you should probably acquire a motor or two.

    Safe travels all!
    Tony and Jenny Conder
    Abilene, Texas
    - - - - - - - - - - -
    2008 Marathon D/S XLII
    2017 RAM 1500 4x4

  5. #5
    Join Date
    Sep 2008
    Location
    Sealy, Texas (50 miles west of Houston on I-10)
    Posts
    832

    Default

    Way to go Tony!!


    Pete & EJ Petree
    2001 Prevost Featherlite Vantare
    2008 Ford Explorer Sport Trac 4x4
    Sealy, Texas

  6. #6
    Join Date
    May 2012
    Location
    Beverly Hills
    Posts
    4,535

    Default

    Tony, nice job! I'm surprised those motors are already obsolete.


    Gil and Durlene
    2003 H-3 Hoffman Conversion

  7. #7

    Default

    Quote Originally Posted by Gil_J View Post
    Tony, nice job! I'm surprised those motors are already obsolete.
    Planned obsolescence Iím sure. Marathon still uses the Coleman Maach 8 on its new coaches, but it is a newer design with different parts.
    Tony and Jenny Conder
    Abilene, Texas
    - - - - - - - - - - -
    2008 Marathon D/S XLII
    2017 RAM 1500 4x4

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