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Ballsed up a repair this week. Done plenty of impellor replacements and seal changes and never had an issue, however this time things had to go wrong. Should have told them to get a new dishwasher, but it seems the quote i did give, was within their price budget :/
so anyhows, fit new insta heater and cleared side heat exhcanger out, and then go to fit new impellor, and could i get old off ? anyway much frustrating dismantling later i got it off, and i think bosch might have misthreaded it originally. fit new one and put it all together, and then theres tiny bit of arcing and so got it back to workshop today to play with an find a tiny break in the copper coils, which would explain it 🙁
So basically after spending out a shed load on parts *£120+ worth@trade* I have a dw that presumably needs a new £145 circ motor.
What i was really hoping is if one of the proff bosch guys would know if the coils can be re-wound, an alternative motor can be fitted (i have several spare s/h ones, visually similar, but none that have a matching part code – 490984, or can i use the coils off one of the other sh motors?
I know the best answer is “ive tried to fix it, I cant fix it for that price, where do you want to go?” and i know they will say theyll get a new machine off tha tinter net. and ill be left with a lot of expensive parts i cant sell as new…
Apart from that i have my pride at stake, and really wanna prove the douche bag husband who queried whether i knew what i was doing – (hes obviously correct ;P ) because id been there longer than an hour 🙁
Re: one for the experienced bosch dw engineers…
I sympathise with your predicament, I really do. I don’t think the motor rewind guys could help you on this one but, more optimistically, reckon those S/H windings you have may well be a winner and worth switching over, if the terminal tags match that is?
Best of luck! 😀
Re: one for the experienced bosch dw engineers…
hmm. my main concern with swapping the windings over was whether the windings were all the same, or if they were of different lengths/qty of windings. and also a new snag, cant seem to dismantle the dodgy motor from the rest of the housing. This really isnt as simple as i thought it would be, like dismantling a bosch wm motor for example :bang:
Re: one for the experienced bosch dw engineers…
gandh1 wrote: and also a new snag, cant seem to dismantle the dodgy motor from the rest of the housing. *bang*
I’m guessing then that the screwed rotor shaft and front bearing housing must be pretty corroded? Usually they are and the thread itself gets pretty bad. Only an overnight soaking with WD40 and protecting the thread with a nut before welding it with a nylon headed hammer will part the windings from the frame. Apologies if I’m teaching granny to suck eggs but not sure from what you said as to how far you’ve got on this?
Re: one for the experienced bosch dw engineers…
no worries martin, yeh it is pretty corroded, no idea about the bearing as i cant get the plastic spacer of the pinion yet!
overnight soaking it is then
Re: one for the experienced bosch dw engineers…
gandh1 wrote:i cant get the plastic spacer of the pinion yet!
Just gently file the shaft to remove the corrosion down to the “spacer” (water thrower) and soak in WD40. A sharp clout with a nylon hammer will shift it sure enough. Can’t recall right now the size of the ball race but it’s common enough and stocked by Qualtex etc.
Re: one for the experienced bosch dw engineers…
going back to the original problem, I guess none of this would have happened had the manufacturer provided a screwdriver slot in the the other end of the motor in order to lock the motor while unscrewing the impellor. Seems an obvious and no cost addition when its being made but rarely seen these days. Miele also have no way of locking the motor without attempting to jam the rotor somehow, often agianst very fragile cooling fins.
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