117939 Lamb Vacuum Motor

4.70 Stars
4.70 / 5 Stars
117939 Motor for Vacuums and Blowers

Product Details

Our brand new (not rebuilt) Lamb Ametek 117939 Motor is a very common motor in many central vacuum brands and models. 117939 motor is a Lamb Ametek original motor.

  • Fan Stages - 3
  • Bottom Diameter - 5.7"
  • Voltage - 110-120
  • Hertz - 50-60
  • Height - 8"
  • Bolt Height -3-1/2"
  • Waterlift -138.6"
  • CFM - 101.2
  • AirWatts - 458
  • Amps - 13.6
What to note: The 117939 vacuum motor may say 7939 or 11-7939.

What motors it replaces: Only replaces 117939 motor.

When to replace: The signs that a 117939 Lamb motor needs to be replaced include: mini breaker popping, electrical smell, excessive blue sparks seen from motor top, you only hear a click, motor shuts down on its own but works later, or its life of 900-1,200 hours has been used up. (If you don't hear a click, then your relay most likely needs to be replaced and your motor may be fine). Five percent of the time, the minibreaker will go bad as well as the motor. If this happens, replace the motor and then evaluate the mini breaker.

How to replace: It is not difficult to replace the 117939 Ametek Motor. There are three to four screw brackets and a couple of wires. All of our customers are amazed at how easy it is. NOTE: There is no core trade-in. Used motors are thrown away. Click here to read and print out our step-by-step motor replacement instructions. Note that if the unit bolts into metal brackets then the ground wire can be snipped. If plastic then attach the ground wire to the ground from the power cord or anywhere to metal on the unit.

Replacing motor brushes: The Lamb 117939 vacuum motor has carbon motor brushes that can be replaced. This should be done before a motor is "on its last legs." Read more about changing the motor brush on the detailed motor brush how-to page. If you are ready to replace your motor brushes, here is a link to the Ametek 117939 Motor Brush. You will need to buy two.
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Part #199R
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Latest Top Reviews

4 Stars

Jun 3 2017 5:15PM
Weren't able to install it ourselves. Shipped quickly and was the correct motor. Need the second one now

5 Stars
Apr 26 2016 9:15PM
Product was good; found later the price wasn't. Got a "reminder" of a coupon the day after ordering that would have helped. Not pleased, will probably not order from this site again. (MD Notes: We have reached out to this customer to ensure satisfaction.)

5 Stars

Jul 16 2014 3:43AM
Excellent product and great price. Thanks for the smooth transaction.

5 Stars

Nov 3 2013 1:25PM
Works as advertised. Replace original 11 year old motors on a SilentMaster S5 - and the unit now works as good as new.

4 Stars

Jan 30 2013 1:56PM
Directions were not easy to follow. Had to call the original installer to replace the motors.