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Re. Bosch washing machine p/n: WFL2462GB/12 FD 8206 600895
Replaced worn motor brushes (new ones supplied by UKW, & thanks to Penguin45’s how-to vid!) a couple of weeks ago and the machine now runs. But noticed odd smell last week so dropped the motor out last w’end and checked the brushes. I also noticed that one of the motor mounting pegs on the drum (@ brush end of the motor) was a bit singed and blackened, hence the smell!? One of the brushes was a bit stiff in the holder (and was arching when the machine was running without a load – don’t know if the arching is normal?) so filed it down gently on fine emery until it slid into the holder smoothly.
Assembled it all again to see if it was a case of the brush not having bedded in…
Smell is still there after a couple of washes so checked it under load this time and noticed that both brushes were sparking (more in one direction of rotation than the other) and that the whole motor was extremely hot, particularly at the brush end! As it stands I don’t think it is safe to use as I’m guessing the motor is getting hot enough to melt/burn the plastic mounting pegs of the drum!
Any ideas on what is wrong? An issue with the brushes or something that I still need to do like clean out/check the motor armature?
I’ll drop the motor out this evening and check the resistance on the windings (5 to 6 ohms if I recall one of Penguin45’s posts).Sorry about the info overload, but any advice would be appreciated!
Re: Hot motor!
Not good news. You need a new motor. It could be that the motor overheated if the one brush was not sliding properly and not being held well against the commutator. The motor only needs to overheat once to get a fault known as “shorted turns”. This is when the motor windings get hot and melt the insulation coating that keeps them apart. Adjacent windings then touch each other, resulting in the sparking you observed.
Re: Hot motor!
Hi Phidom, Thanks for the reply.
I thought that might be the case 😥
I did drop the motor and measured the armature (through the brushes) and got about 3 ohms. Also noticed that the enamel on the external windings (for the electromagnet?) looked like it had melted in places.
Time to see if I can find another motor or, more likely, a new machine!
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