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Thread: need to convert compressor from 220 to 110

  1. #1
    maddjohnny Guest

    need to convert compressor from 220 to 110

    I have an old Sears 2 hp air compressor I just bought off someone. It runs great, but he had it wired 220. Originally it was 110, but he upped it to 220 a long time ago and doesn't recall how he did it.
    He also added a standard household on/off switch along the line.
    My circuit breaker box is on the complete opposite end of my house from where the compressor needs to be, so I really do not want to run a new line for 220. We may be moving within the next year anyway. I would rather switch it back to 110. I know the plug end needs to be changed, but what needs to be done on the other end?
    -john

  2. #2
    Join Date
    May 2005
    Location
    Paso Robles, Calif, USA.
    Posts
    2,873
    the wiring diagram may be inside the cover on the motor. you will have to switch two leads to switch it to low voltage.
    Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison

  3. #3
    Yuppers, remove the cover where all the wires enter the motor housing at. There should be a label on the back of that cover with a wiring diagram.

  4. #4
    maddjohnny Guest
    I looked, but there is no diagram under the lid.
    I probably just need to switch some wires around, but I have no idea which ones and i frown on frying myself.

  5. #5
    Join Date
    Dec 2002
    Location
    Paw Paw, MI, USA.
    Posts
    5,242
    The diagram is sometimes on the outside of the motor too.
    Monte (another darksider)
    Reporting Live from somewhere near Kalamazoo

    http://community.webshots.com/user/monte49002

  6. #6
    Or plan 3.. google the model #.

  7. #7
    maddjohnny Guest
    Theres no wiring diagram anywhere on the compressor. That was the first thing I thought of.
    I did a google search for:
    sears air compressor 106.153780
    but was no help.

    Here is what I have:
    Sears 2 HP air compressor.
    Twin cyl.
    Model # 106.153780
    150 psi max.
    The compressor was made in the 1970s.
    Maybe close to 1980.

    I attached photo(s)
    There are only 4 wires, 2 white and 2 black.
    one of each going to plug and one of each going to motor.

    Any ideas?
    -john










  8. #8
    Join Date
    May 2005
    Location
    Paso Robles, Calif, USA.
    Posts
    2,873
    the wires you are showing are for the pressure switch, they don't ahve anything to do with the motor's voltage wiring. have you peeked under the cover held on by 2 screws on the end of the motor, it is to the right of the red button.
    Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison

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