So I recently got myself a decent-looking electrolux 1205 for use around the house. It replaced a real lemon of a modern vacuum, and has been one of the best vacuums I've ever used.
So, it saddens me to find out that it's starting to develop a problem with the motor. Here are the symptoms I'm noticing. These slowly start to appear after the machine runs for a little bit.
-Motor hum starts to get sharper and more pronounced.
-Rattling noise appears, and gets louder.
-Motor speed begins to drop
If I need to make any sort of video or audio recording to illustrate this, I will.
I'm not afraid to tear into the motor (Already had the vacuum apart once as a practice run) If anything, I'd like an expert's opinion on what could be wrong with the unit. I'm not sure if it's a lubrication issue, or if the brushes are improperly contacting the commutator.
IF it's a lubrication issue, can lubrication with blue-can 3-in-one SAE-20 oil solve the problem, or will I have to look into bearing replacement?
On the other hand, if it's a brush/commutator issue, what typically goes wrong here? Will cleaning out the brush holders with alcohol do the trick? Also, how indispensable is a seating stone?
Attached a picture of the motor to illustrate the condition of it. Maybe an astute viewer can pick up something.
Anyway, I'd appreciate any advice you guys can give.
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