PeachParts Mercedes-Benz Forum - View Single Post

F18 · #1 10-14-2009, 04:02 PM

I must have a horse shoe stuck up my butt!......another lucky quick fix!

My Auxiliary Fan had started working intermitantly and then finally quit over this past year. Direct voltage to the Fan at the plug would occationaly get it to work if I spun or jarred it. The CCU indicated the variable current was happening when the coolent and AC system hit certain temp thresholds but the fan would not run anymore.

I remove the motorized fan from the assembly but before I bought a replacement I wanted to see the condition of the brushes and commutator.
So I tried to remove the fan from the shaft to get at the motor. I did not have a puller with long enough arms so I supported the fan on blocks of wood with the back of the motor hanging down and gave the center shaft some wacks with a hammer and a broad center punch. The fan did not budge but about an ounce of fine "road dust" fell out of the vent holes in the back of the motor. So out of curriosity I flushed the motor with electronic cleaner/ MAF cleaner and wacked it a couple more times and flushed the motor again.

I tested the fan after I temporarily screwed it back on the frame and it ran better than when I bought the W210 in 2005 on low and high 12 volt current.
Now its working great!