1983 Hoover Turbopower motor issue

[vacuumlover]

Was servicing this turbopower and gave the motor a test run before I went rebuilding anything else (motor sounded awful before I even started work so wasn’t holding out much hope)

Just looking for a second opinion on this motor, In my opinion I think it’s burning out (have never actually experienced one doing so in my 25 years of life so am unsure)

I know for sure that the brushes are sparking/arcing waaay too much and it sounds slow to me. Brushes still have life in them, so don’t think it’s those? Bearings have been replaced as well. Brushroll hasn’t got a belt on it either so would be spinning a bit faster than normal.

I didn’t hang around long enough to smell if anything was actually burning either….and I was hidden behind a door haha.

Thanks in advance.
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[centralsweeper63]

Maybe it is a shorted winding? Good luck whatever it is.

 

[huskyvacs]

Were all bearings in the motor replaced? And how about the shaft? A motor can have several lubrication points for the shaft. The commutator needs polishing for sure, check for any foreign bodies or debris inside the motor armature and magnets. If you did not put in the carbon brushes back the exact same way and same position they were removed, they will need to re-hone in again, and will spark and make the motor sound rough because of bad electrical connection. Make sure to clean out the mica gaps with a pick and make sure those are all clean.

Try putting a belt on it and see if it changes. An unloaded motor will always have a higher RPM than a motor with resistance because its spinning at the limits of its manufacture. Often a motor will just sound the way it sounds because it was made cheaply or is a small motor. It sounds like a Dustbuster motor to me.

 

[centralsweeper63]

Those are good points.