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Bosch WFB2004GB/16 (Dunno how old that is!?)
FD7708 00684The machine seems to be working fine, but a couple of times in the last week it’s tripped the power.
It also occasionally makes a sudden banging noise when starting a spin (I think) but once it’s spinning it’s fine. The drum doesn’t have too much play within the outer drum.I’ve read some of the relevant threads in this forum, but still unsure of what the cause might be.
Is it possible that worn brushes could result in the banging?
Thanks!
Re: Bosch WFB2004GB/16 bang on start of spin
I would start by checking the motor brushes.
Should be app 1.5 inches.
Power off first :plug:Re: Bosch WFB2004GB/16 bang on start of spin
gegsy wrote:I would start by checking the motor brushes.
Should be app 1.5 inches.
Power off first :plug:Great, will do, thanks!
Colin
Re: Bosch WFB2004GB/16 bang on start of spin
gegsy wrote:I would start by checking the motor brushes.
Should be app 1.5 inches.Thanks. I had a look, and they look pretty good.
When removed from the motor, the brush section extends just under an inch from the cartridge/carrier — seems fine, but I guess not if you say that they should stick out by at least 1.5 inches?Thanks
Colin
Re: Bosch WFB2004GB/16 bang on start of spin
The brushes start out at 1.5″ and wear down over time. They will be down to a few mill before the motor actually stops.
These Spanish machines used several different motors over the course of production. The ZEM/SOLE motor has a particular fault whereby the tacho magnet in the end of the motor works loose and causes problems with the speed control circuits in the electronic board. A wipe of contact adhesive and screwing it fully home sorts that particular problem.
Otherwise, you need to look at the dampers on the drum for resistance when “bounced” and check that the machine is fully and quickly draining. Beyond that, the motor may just be becoming old and tired or the electronics may not be behaving as they should.
It’s over 10 years old now, so don’t go mad with your spending on it.
Penguin45.
Re: Bosch WFB2004GB/16 bang on start of spin
Thanks for that.
(I didn’t make a note of the motor details when I had it open, but I thought it was possibly Italian made?).
I wondered whether the dampers were the problem. One seems to have some slight signs of leakage — are they fluid filled or is that just lubrication?
Another thought I had, was that it fills to a higher level than I would have expected. The rinse fills to almost half way up the door, I would have expected it be about 1/4 or 1/3 of the way up the door?
Thanks!
Colin
Re: Bosch WFB2004GB/16 bang on start of spin
colint wrote:
I wondered whether the dampers were the problem. One seems to have some slight signs of leakage — are they fluid filled or is that just lubrication?I suspect that it’s the dampers on their way out. Seems that the banging only happens on fuller loads, or loads including bedding or towels (I think my missus is prone to overloading it, but she insists not!).
I’ve tried the damper test suggestion (pushing the drum down sharply) but I’m uncertain what it indicated. I’ll try that again with the top off, as last time I did it with only the front off, when checking the brushes.
As a a matter of interest, what would a set of dampers for this machine cost?
Thanks!
Colin
Re: Bosch WFB2004GB/16 bang on start of spin
As a suggestion check the top concrete balance weight….
if this has moved or is loose banging/knocking can result which is made worse with bigger wash loads.
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