I trying to repair a small Barber-Colman 24v DC motor model CYQM 23310-47, P/N 44678634 (photo attached).

I need to replace the 2 toasted, totally un-identified coils on the internal board (photo attached).

Anyone have any idea about their values?

NB: the Capacitors are 10 nF

 

Can you trace where the two inductors are connected?
In series with the brush leads ?
If so, they may be just for suppression.

 

Can you trace where the two inductors are connected?
In series with the brush leads ?
If so, they may be just for suppression.

Yes, they're in series with the brushes, attached the full wiring

 

Yes, it appears to be an attempt at both interference & arc suppression .?

 

Yes, it appears to be an attempt at both interference & arc suppression .?

So, any suggestions? I need it up and running urgently.
Thanks in advance

 

If it is a case of one or both of the inductors open circuit, either rewind it or short it out for now.

 

If it is a case of one or both of the inductors open circuit, either rewind it or short it out for now.

If I short them, would that affect the motor operation in any way? Or even shorten its life?
For how long can I operate it with shorted inductors without damaging it?

 

The inductors are essentially a short circuit as far as the motor DC supply is concerned,
Also, that does not appear to be a very large motor, I see them more as affecting external devices, electrical noise etc. ?

 

The inductors are essentially a short circuit as far as the motor DC supply is concerned,
Also, that does not appear to be a very large motor, I see them more as affecting external devices, electrical noise etc. ?

Thanks, should I keep the 2 capacitors or get rid of them as well?

 

They can stay.
BTW, did the motor have a problem that you felt the need to repair it?

 

They can stay.
BTW, did the motor have a problem that you felt the need to repair it?

Yes, it stopped working and I can see some filament cut from the inductor

 

I would jumper the inductor and test the motor to see any problem with it shows up .

 

Out of interest, where was this motor from?

The only time I've seen anything like this was when I opened up a cheap 240-V AC hot air gun with an 18-V DC motor inside running the blower fan.

 

I would jumper the inductor and test the motor to see any problem with it shows up .

I did jumper them and it's finally running smoothly after cleaning and re-greasing the gearbox. The only downside I noticed is that it gets very hot almost immediately (within 2 minutes). I tested it for 10 minutes only with no problems.

 

Out of interest, where was this motor from?

The only time I've seen anything like this was when I opened up a cheap 240-V AC hot air gun with an 18-V DC motor inside running the blower fan.

I actually don't know.. LOL. I bought it from a flee market long time ago, it was just sitting in my junk box collecting dust for many years. But it had some kind of aluminum stick attached to its shaft, see the picture maybe you can identify its origin.

 

There could be an issue with the motor, it should not get very hot with just a few minuets run time, unless there is an issue with the gear box?

 

There could be an issue with the motor, it should not get very hot with just a few minuets run time, unless there is an issue with the gear box?

That's why I clean it and applied new grease, but still the heat persists. Guess I'll have to re-check it again. I'll let you know the outcome.