bosch with the siemens motors where the t/o/c pops

[gandh1]

just had another couple of these giving up. bosch with the toc thats fitted to the plastic carbon brush holder collar.

wfl or wfo2466 i think iirc, and another wae24162…

got a new sale from one of them but the other customer is kicking up a fuss, cos we went straight to the motor, and spent about 2 mins checking it, (albeit after about 30 minutes of extrication from under their worktop) is refusing to pay the callout because we havent fixed it and didnt warn her the machine could be b/e/r over the phone when she booked it (which is not quite true but she has a different kind of memory to most people)

thing is i cant believe these t/o/c are not replaceable, and i need to get this machine working as rest of her family are good customers, and i could walk away but it could alienate all of them 🙁

[Martin]

Re: bosch with the siemens motors where the t/o/c pops

gandh1 wrote:thing is i cant believe these t/o/c are not replaceable, and i need to get this machine working as rest of her family are good customers, and i could walk away but it could alienate all of them 🙁

First you need to bear in mind it is NOT a thermal fuse but an over current based power fuse. So you could solder loop in a 5 amp fuse link OR simply short it out altogether if you wish. But the overall problem is that the armature/windings are drawing far too much current. The motor is fluked basically!

[gandh1]

Re: bosch with the siemens motors where the t/o/c pops

ahh that makes sense. so would regular overloading cause this, thanks to the increased effort required to turn a heavier than designed for drum ?

(i think you can see where my get-out is coming from)

[Martin]

Re: bosch with the siemens motors where the t/o/c pops

gandh1 wrote:ahh that makes sense. so would regular overloading cause this, thanks to the increased effort required to turn a heavier than designed for drum ?

(i think you can see where my get-out is coming from)

Overloading? Doubt it,…..Non-stop use more likely…..also, slow/restricted drain-out causes a strain on the motor anyway…….finally, old age lifespan issues. The trick is deciding which of those primary probs is YOUR prob? In my experience non-stop useage in almost all cases is the reason, but your customer will never admit to that, no way! :rolls:

[Madmac]

Re: bosch with the siemens motors where the t/o/c pops

Its a problem on these motors to be sure. I seem to recall fitting a spare TOC from an old motor to one a few years ago(better than nothing 😉 ) It meggered ok once the carbon dust was blown out and ramped up to spin with no sparks or other worrying signs.

I wonder if some of them pop their fuse just because the high resistance on the worn brushes causes a high current flow ❓

These motors can of course not survive past their first set of carbons, not the strongest units IMO 🙁

[gandh1]

Re: bosch with the siemens motors where the t/o/c pops

Martin wrote:
Overloading? Doubt it,…..Non-stop use more likely…..also, slow/restricted drain-out causes a strain on the motor anyway…….finally, old age lifespan issues. The trick is deciding which of those primary probs is YOUR prob? In my experience non-stop useage in almost all cases is the reason, but your customer will never admit to that, no way! :rolls:

yeh id go with that, i only ask because the machines sides resembled the birthscenes of the aliens from aliens,2,3,avp etc. so obviously been overloaded in the past. No waste issues – standpipe that goes straight outside. Would agree with high usage, but thing is the carbons were not well worn, – they only about 1/4 length, and the machines fd was 86, so 4 years… and this is the first time anyones been out to it. It is another john lewis jobby though, and last 3 fuse failures were JL machines. if that has any bearing on it???

lastly, are there any other forms of current filtering or control that are used in other models, which this may have had omitted or, could it be power spiking during use that has done the damage. in this customers case the pcb on the boiler went wrong that week, along with something else, TV i think iirc

[Author]

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