Bosch WET2820GB/01 Changed motor end frame

[Bernie]

Bosch WET2820GB/01 Changed motor end frame, (as brushes worn out) now on wash, motor turns 4/5 sec stops, turns again 4/5 sec stops, goes in the other direction for 4/5 sec stops and that is it no flashing leds, just sits there.(when it does run it seems a bit fast, not the normal was speed)
On spin it will spin for 4/5 sec stops spin for 4/5 sec stops, spin again for 4/5 sec, and that is it.
I did not mark the position of the fields to the end frame, but did check I had continuity through the fields and armature at the motor plug, so guessed I had it round the correct way.
When it did not work I tried the fields round the other way, but still will not run for more than a minute.
Did the old worn out brushes do something to the PCB?
Many thanks for looking
Bernie

[Martin]

Re: Bosch WET2820GB/01 Changed motor end frame

Bernie wrote:Did the old worn out brushes do something to the PCB?

What was the part no of the end frame, was it 00496876 ?

[electrofix]

Re: Bosch WET2820GB/01 Changed motor end frame

sounds like a tacho problem

or wrong part

have you got tacho continuity and output when motor turns

Dave

[Bernie]

Re: Bosch WET2820GB/01 Changed motor end frame

Yes Martin the part number was 496876
I was wondering about the tacho, where is it on these?

Bernie

[Martin]

Re: Bosch WET2820GB/01 Changed motor end frame

Bernie wrote:I was wondering about the tacho, where is it on these?

Tacho built into the end frame.

The tumbling for 4/5 seconds is therefore a bit of a worry and I’m thinking you may have to dig out the module on the base and check that out. 🙁

[Bernie]

Re: Bosch WET2820GB/01 Changed motor end frame

Found the tacho in the end frame, new one tests the same as old one. Other than continuity testing is there anything else I can do?

Thanks
Bernie

[eastlmark]

Re: Bosch WET2820GB/01 Changed motor end frame

Not done one of these for years but is it possible to fit the field coils the wrong way round somehow? have a distant memory of such a thing.

the pcb triac is available on its own for that one 00155272 so may be worth a punt.

[alster]

Re: Bosch WET2820GB/01 Changed motor end frame

I think the tacho has a plug on the end frame that plugs into the main part of the motor,has the plug missed the socket so to speak?? Alan

[Bernie]

Re: Bosch WET2820GB/01 Changed motor end frame

Thank you for all your suggestions, but it was a faulty part.
I fitted new brushes to the old motor end frame(yes it can be done)and it all worked as normal.

Thanks again
Bernie

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