Yeah . This is the first time I have seen the collector of a Tag Electric Motor being ground or cleaned with a file with a coarse notch. There it is also sanded with zero-grade sandpaper at the end of this procedure. As for the brushes themselves, when the brush is new, so that it gets used to the commutator, this is done at low engine speeds. In general, you need to periodically monitor the condition of the brushes in the traction motor. Also monitor the wear of the brushes and the condition of the brush mechanism. So, the springs that press the brushes to the commutator can have the property of DEGRADING. This is when the spring loses its original state of elasticity, and begins to weaken, and does not press the brushes against the commutator. In addition, you should also monitor the condition of the bearings in the traction motor (the mechanics of the engine itself). If VIBRATION appears during movement and the electrical protection of the traction motor is triggered (automatic operation in the power circuit of the control circuit of the traction motor). This will already mean that in this case it is necessary to replace the old worn bearings with new ones. But this is already done when the traction motor has been REMOVED from the motor compartment in the trolleybus.
@@regardman It’s not clear where the rust could have come from? If the water didn't get there! Moreover, brass is STAINLESS! And the dust is most likely graphite when the brushes rub against the engine commutator.
@@endreu1 Error! After all, it is known that aluminum is STAINLESS, that is, a metal that is light and not susceptible to CARROSION! Only one type of metal is susceptible to CARROSION: IRON-containing ALLOYS! This is only CARBON STEEL! And all those groups of metals: aluminum, copper, zinc, and others are CORROSIVE!
@@user-xy7gr6wl8f the motor is not air tight sealed, so moisture can corrode the springs, so there's your rust source. Also different metals joined together will corrode each other, so you are wrong about only iron corroding (also have you never seen green patined copper, or corroded copper wires which crust to nothing?)
