Help needed for capacitor for my Sedwick Thicknesser

[RonnieSF]

Hi, hope someone can help. My Sedwick thicknesser has stopped running, and is making a buzzing sound but not starting. I think it is the capacitor. I was going to replace the one thats on it (see photos). This is not the orginal motor, 3phase was replaced with single phase.

Does anyone know if you can just buy a universal capacitor with the same specs? And does it look like this is the correct one for the motor?

Any help would be much appreciated.

Thanks
Ronnie

 

[imageel]

Any AC rated capacitor of the same values - 450V AC and 25µF - 25 micro-farads (mfd) will do, don't get too hung up on the tolerances they are usually wildly out.
Try ebay for likely the cheapest options

 

[Spectric]

Does anyone know if you can just buy a universal capacitor with the same specs?

Just buy one that has the same specs from anywhere that does appliance / machinery repairs and tread carefully with ebay as you might end up with something that will not last. I was going to suggest Colchester rewinds but noted you are in Scotland and not Essex.

 

[Kevinsm]

Have you checked the capacitance with a multimeter? It’s quite easy if you have one with this function on it.

 

[Cabinetman]

Granny- eggs sorry, do short across the terminals with an insulated screwdriver before you touch it, same applies with a newly delivered one too.

 

[RonnieSF]

Any AC rated capacitor of the same values - 450V AC and 25µF - 25 micro-farads (mfd) will do, don't get too hung up on the tolerances they are usually wildly out.
Try ebay for likely the cheapest options

Thats great, thanks will have a look for one with the same specs

 

[RonnieSF]

Have you checked the capacitance with a multimeter? It’s quite easy if you have one with this function on it.

No I havent will try that, thanks Ronnie

 

[RonnieSF]

Granny- eggs sorry, do short across the terminals with an insulated screwdriver before you touch it, same applies with a newly delivered one too.

Thanks for the advice!

 

[MorrisWoodman12]

Any AC rated capacitor of the same values - 450V AC and 25µF - 25 micro-farads (mfd) will do, don't get too hung up on the tolerances they are usually wildly out.
Try ebay for likely the cheapest options

@Ronnie please note just to remove a possible confusion, where imageel's post says mfd is incorrect. Micro farads are either µF or, since not all keyboards can show µ, simply uF. µF is F/1000,000 whereas mF is F/1000.
As I said I only mention it to avoid confusion.
Martin

 

[RonnieSF]

@Ronnie please note just to remove a possible confusion, where imageel's post says mfd is incorrect. Micro farads are either µF or, since not all keyboards can show µ, simply uF. µF is F/1000,000 whereas mF is F/1000.
As I said I only mention it to avoid confusion.
Martin

Great thanks Martin

 

[RonnieSF]

UPDATE: I bought a new capacitor, with the same specs and fitted it although it’s still not working when turned on. Making the same buzzing sound but not starting. I found this black capacitor (see photo) or maybe it has a different use when I was fitting the other one. Could anyone shed some light as to what this does, or what else could be the problem? Maybe I should have removed that as well?
Many thanks
Ronnie

 

[Fitzroy]

Motors often have a start capacitor and a run capacitor, a centrifugal switch drops the start capacitor out of the circuit once the motor is up to speed. Looks like you machine has both and you may have changed the run capacitor rather than the start capacitor.

 

[Wildman]

Some motors have a combined start/run capacitor, others have separate. The second is often inside the motor, you should send it to be serviced.