Fixing my noisy Helios KWL

Fixing my noisy Helios KWL

By |

After running for over 9 years, 7/7 and 24/24, my Helios KWL EC 500 Pro started to make more and more noise. It was especially noticeable at night, even at a lower speed. Clearly, the motors were the culprits, and since they are brushless motors, the ball bearings were for sure at the end of their lives. I removed one of the motors, read the reference number, and found a very nice video on YouTube explaining how to change the ball bearings on a similar model. The reference of the motors for my KWL EC 500 Pro is R3G160-AC50-12. The ball bearings are the same as in the YouTube video. I ordered 4x SKF 6000-2RSH/C3 from brw.ch and after a few hours of work, my KWL is running silently like on the very first day.

Motor from ebmpapst.
Carefully remove the electronic part.
Be very careful with the RPM sensor
Now, we have access to the interesting parts.
Separating the rotor from the stator is the most complicated part. You will need the appropriate tools (see the YouTube video).
Everything back in place in my KWL EC 500 Pro
Comments are closed.