Bosch washing machine - replaced motor brushes, motor now "fizzes"
Unplug the machine , hopefully you did not fry the motor , let it cool down!
First remove the brushes, both of them and rotate the motor while looking at the armature, there should be even segments all the way around this is the commutator it should be a even chocolate brown in color. If any of the segments are missing the motor is toast.
All the segments there hopefully not two badly burned
you may need to seat the brushes it sounds like the cup to the brush was not correct (common) or they were installed 90 degrees out. So only the points were touching the com.
Large motors we seat the brushes with some emery around the com, small motors I will check the fit even the highest quality brush may have a different cup or diameter com. So the brush arcs, the other thing that can happen is the brush is to tight in the holder it should slide all the way in without pressure needed or once in it should fall out if pointed down, if snug a quick pass over some emery cloth or 400+ sandpaper will quickly reduce the size.
If the brush fit to the commutator is bad enough damage to the com can ruin the motor.
When you pull the brushes examine them for burns.
Arc marks in the center on each side is evidence of the brush in 90 out.
Burns on only 1 brush across the entire brush point to over sized not in contact.
If there are divots in the com that is a higher level of repair than you may the ability to do.
When brushed motors are running properly there should be a fine line of arcs at the edge of the brush that move or dance back and forth.
The big flash and the rcd tripping may point to a non repairable problem for DIY. But checking the com and brush seating is the first step.