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Adapting/modding Harrison Heater...

Discussion in 'Builds and Fabricators Forum' started by 55_Willys_CJ5, Oct 25, 2019.

  1. Oct 25, 2019
    55_Willys_CJ5

    55_Willys_CJ5 Nephews Visit 2017 Sponsor 2019 Sponsor

    Southern California
    Joined:
    Aug 4, 2015
    Messages:
    278
    Picked up an old CJ2/3 Harrison Heater for the astounding cost of a conversation. Going to use this to track the restoration/modification to see if I can use it in my CJ5. Here is a link to the folder that the progress photos will be posted to:
    Harrison Heater

    After the restore, if It turns out I can't make it work I will offer up in the classifieds...stay tuned.

    There are two videos in the above folder. One is with the fan still attached to the motor and the other is without. I took the motor apart due to the loud squealing. Overall condition is decent but it definitely has been used. There is a well worn groove on the commuter portion of the armature. By researching the internet, I was able to find this as a possible motor replacement:

    VDO New A/C Heater Blower Motor PM354

    This motor has two wires that allow it to be ran either CW or CCW. The original motor runs CCW to pull air in and push it through the heater core.

    My thoughts on adapting to the CJ5, depending if this will fit:
    - Use the above mentioned motor and with a three way toggle switch, I would be able to switch the direction the fan rotates. (Think Floor or Defrost)
    - Using CAD, fabricate a housing that will cover the exposed fan blades and allow for the connection to the defrost duct hose.

    In theory , if all goes well and this plan works out. I will have a heater that I can use to warm the cab and switch between floor and defrost. More to come as I find the time to piece this all together.

    Status of Heater:
    Housing - Disassembled and pieces sent to be blasted and powder coated
    Fan - Same as housing
    Heater Core - Cleaned and pressure tested. Leak at one of the tubes were it connects to the tank. Taking to local radiator shop to see about repair.

    Still in the process of sourcing the rest of the parts I will need to make this happen. looking forward to the end result
     
  2. Oct 25, 2019
    Buildflycrash

    Buildflycrash Member Sponsor

    Gulf Breeze FL...
    Joined:
    Jun 5, 2007
    Messages:
    993
    I have one in my 3B. I’m about to take it out and definitely interested in heater resto-mod.
     
  3. Oct 26, 2019
    Jw60

    Jw60 Recovering Jeepaholic

    Sedalia MO.
    Joined:
    Oct 5, 2018
    Messages:
    302
    What is the inside diameter of the inlet opening?
     
  4. Nov 3, 2019
    55_Willys_CJ5

    55_Willys_CJ5 Nephews Visit 2017 Sponsor 2019 Sponsor

    Southern California
    Joined:
    Aug 4, 2015
    Messages:
    278
    Are you asking for the fan inlet? if so, I will measure once I get it back from powder coating.

    Update:

    New fan motor came in. Here is short video of the motor working:


    Using a Toggle Switch (Double Pole Double Throw) to control the direction the motor spins (Clockwise of Counter Clockwise). The above test proved the concept will work. Once I get all the components back. I will be able to start mocking up the heater housing for defrost capability.
     

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