How To Change Out A Swamp Cooler Motor

By | July 17, 2015

How To Change Out A Swamp Cooler Motor 2019
A video is at the bottom of the page for a visual walk through if needed.
 
If you have a swamp cooler motor go bad changing it out for a new one is a relatively easy job.
 
The first thing that is a new motor to replace the old one. HVAC stores will carry a motor needed or they can even be ordered on Amazon.
 
Swamp Cooler Motor On Amazon
Century SVB2054 1/2-1/6 HP, 1725/1140 RPM, 56Z Frame, CCWLE Rotation, 1/2-Inch by 1-5/8-Inch Flat Shaft Evaporative Cooler Motor

A name tag on the motor will show what HP it is along with the voltage it uses such as 120 or 220 Volts.
How To Change Out A Swamp Cooler Motor
The name tag will also show if it is a one speed or two speed motor.
 
This is basically the high and low which a two speed motor can do while a one speed motor will always turn at the same speed.
 
Below is a quick over of steps along with the steps with pictures. A video is also at the bottom of the page if needed.
 




 
How To Replace A Swamp Cooler Motor Quick Overview

  1. Remove the side panels on the swamp cooler
  2. Remove the motor belt
  3. Unplug the motor wiring
  4. Remove the bolts
  5. Remove the old motor
  6. Install the new motor
  7. Bolt the new motor into place
  8. Attach the belt and tighten it
  9. Plug the new motor in
  10. Power on and test the unit

How To Change Out A Swamp Cooler Motor With Pictures

  1. Remove side panels exposing the motor.
  2. To Change Out A Swamp Cooler Motor
     

  3. Loosen the bolts that keep the belt tight if necessary, Often this can be skipped and the belt taken off as the wheel is slowly turned.
  4. replacing a swamp cooler motor
     

  5. Both sides if the motor will have clamps that hold it in place. Simply unscrew them and the motor will come out.
  6. evaporitive cooler motor removal
     

  7. The wiring will be under a face plate that needs removed. For 2 speed motors there will three connections High, Low, and Common.
  8. swamp cooler wireing
     
    Sometimes the numbering will be obvious with a “H” for High “L” for Low and a “C” for common.
    swamp cooler two speed motor wiring high low common
     
    Other times the High and Low will be more cryptic. Simple look at the schematic on the side of the motor to see which is high and which is low.
    swamp cooler wiring 22
     

  9. The pulley will need to be moved to the new motor which can sometimes be a pain. There is a Allen screw that hold it in place once this is removed it slides off. Often though this is the toughest part off the job since the wheel can be rusted in place. Use sand paper to remove rust from the tip of the shaft if possible and oil to help remove it. A puller is sometimes required which can be rented at places such as Auto Zone.
     
    Every unit will be different on how tough they are stuck to the shaft sometime it is simpler to just buy a new pulley wheel.
  10.  

  11. Once the pulley is on the new motor next is to wire n the new motor.
  12.  
    After verifying the which is high and low swap the wires to the new motor, and screw back on the face plate.
     

  13. At this point everything is reverse of pulling it out. Put the clamp back on the motor that hold it in place and slip back on the belt.



Summary
Replacing an evaporative cooler motor is an easy task but as with any project if you don’t have a construction/HVAC background than it may be best to hire someone.

The main steps are to remove the old motor install the new one wiring it in.

Be sure to match the old and new motors and get the correct replacement.

The last step is to be sure the belt is tightened up correctly and testing the unit.

 




 

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