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Re: BOSCH WFP 3300 FAULT CODE F05
I’ve ordered the brushes and will post the results.
The picture of the part on BSH (096809) looks identical to mine so I agree they should be correct.
Fingers crossed!
Re: BOSCH WFP 3300 FAULT CODE F05
Brushes quickly delivered and are now fitted.
The fault was down to the brushes so thanks for being persistent with me. I was reading 4.6 Ohms. There must be a resistance detection circuit to monitor the wear of the brushes.
The brushes supplied are a perfect fit however the wire tail is different. I’m not sure what the new connector is called but it is a kind of slide-on/spade arrangement with an insulated tail. The original is a bare copper braid that is stamped/soldered/brazed(?) onto a busbar embeded in plastic (probably Bosch part 096809). What I have had to do is cut off the old brushes and slide the new connector over a doubled up piece of braiding. I can’t see any other way of making the connection and I fear that it will only be a matter of time before the connection fails so I will probably order Bosch part 496875 in readiness.
Any suggestions for a better method of fitting?
Re: BOSCH WFP 3300 FAULT CODE F05
Bosch part number 496875 is the motor end frame surely Gegsy, it’s £40 odd ?
BS12102 is the pattern alternative as Bosch don’t supply those type of brushes on their own. The terminal is made that way to connect where the old brush was connected, I’ve not fitted a pair for a while but I’ve not had any connection problems with them 🙂
Some technical blurb on them:
special terminals to eliminate the need for soldering in to the carbon shield
Hope this helps.
Dave.
Re: BOSCH WFP 3300 FAULT CODE F05
Yes its the end frame. Daves option is far cheaper and sensible as end frame module is £31 plus vat etc.
Greg
Re: BOSCH WFP 3300 FAULT CODE F05
“special terminals to eliminate the need for soldering in to the carbon shield”
The special terminal is the slide-on/spade arrangement that I mentioned before. Spade shaped edge connector might be a better description.
From the quote it sounds as though the braid on the old brushes are soldererd and as there is no connector to push the “special terminal” onto that means pushing it onto the braid is the only way to do it.They work fine but it does look a bit of a bodge which made me think I was doing it wrong. I might leave it and if they give me problems then I will order the full Bosch part.
The replacement brushes wore down very quickly so I bought the complete unit from Bosch (496875) in October. I am now getting the F05 error yet again.
Something is wearing out the brushes too quick. I have also noticed slight interference to the radio & digital TV when on the spin cycle.
Any thoughts?Re: BOSCH WFP 3300 FAULT CODE F05
Hi
It sounds to me that you may have damage to the motor commutator eg raised segment/s.
When you replaced the brushes, did you happen to spin the motor spindle and if so was there an apparent clicking noise? If so then it would be a fair assumption without physically seeing the motor that damage has occured.,A visual inspection of commutator may show area of damage also.
Greg
The commutator was fine and span smooth. The only thing I missed was to clean it up with emery cloth but it wasn’t that bad. I’ll check the commutator anyway.
My guess was if a connection somewhere that was HR could be the cause of premature wear.
Re: BOSCH WFP 3300 FAULT CODE F05
Don’t use emery cloth 😯 You need a comstick, its much better. Emery cloth is too harsh and will cause damage to the commutator.
It may be time to get an engineer to confirm the problem TBH, if you cannot see anything else obvious.
Greg
I’ve had a close look and I think the commutator is worn. The segments aren’t raised but three or four are showing signs of wear on their edges so instead of a nice straight gap of about 0.5mm some go in about 1-2mm in the middle. The whole commutator is also shaped slightly to match the profile of a brush.
Curiously I tried replacing a brush that had worn right down with an old one that still had about a third of it’s life left but I still got F05.
I think my options are pay £200+ for a motor or get a new machine.
Re: BOSCH WFP 3300 FAULT CODE F05
Hi
What you need to be aware of now is if the motor has been arcing and the like, chances are it may have also damaged the power module.Just putting all the cards on the table for you, rather than you rushing out and buying a motor only to find you need to spend the same on a module.
Greg
I decided to order a new machine. Rather than risk £200 for the motor I have gone for a new LG for £370 with a five year guarantee.
Thanks for all your advice.
PS
Anyone want a well used but good WFP3300 (minus motor) for free?Re: BOSCH WFP 3300 FAULT CODE F05
I’ve had *exactly” the same experience replacing the brushes in this machine (WFP3300GB01).
Brushes wore out after 7 years – machine had the curtosy to finish the load and then errored on the next. Braided cable just poking through the end of one of the brushes, the other one pretty worn as well.
I ordered the recommended brushes & comstick, disassembled, cleaned, reassembled. For the benefit of others, the brush springs can be held back using (i.e.) the motor bolts through the back of the end cap in order to provide clearance to go over the tachometer. And the replacement brushes can get their power from the exposed brass they mount into.
However upon reinstallation the motor was a lot more noisy. A bit whirry.
Although I initially put it down to the brushes needing to wear in I took a look after about 3 months. One of the brushes was already about 50{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} worn.
The whirring is detectable “on the bench” spinning by hand, and occures without any brushes. I think the rear bearing next to the brushes is failing. It seems likely that I damaged it pulling the motor apart. However why the brushes should be wearing so quickly is not so clear. Perhaps these brushes simply have the wrong carbon content for this motor? Or require a greater spring pressure?
The commutator now has a light shiny film visible on one side of each strip but what looks like lack of contact on the (trailing?) edge.
Looks a bit like bar edge burning here:
http://www.gulfelectroquip.com/technica … commutatorAll very confusing and very dissapointing. As with the OP, it looks like motor failure will kill this superb machine with Bosch wanting insaine money for a replacement.
Cheers.
Re: BOSCH WFP 3300 FAULT CODE F05
The nearest mine was to anything on the Brush/Commutator Wear Guide website was “grooving” but instead of two grooves as shown in the picture I had just the one. My feeling is that the commutator is designed to last roughly as long as the brushes. Brush replacement is worth a try because it’s cheap but don’t expect them to last and use the time to save for a new machine.
Re: BOSCH WFP 3300 FAULT CODE F05
Replacing carbon brushes does seem to be a law of diminishing returns. Each successive pair of replacement brushes lasts less time than the previous set as the efficiency of the motor drops with age.
To deal with your immediate problem, if the motor is not happy with the new set of brushes, consider the following:
1/ If the commutator has “grooved”, the brush face is not running against the commutator properly – it may be running on the shoulders of the groove and not the running surface = very poor contact. Removing the brushes and relieving the corners of the brushes will allow them to sit home properly for better contact.
2/ Many years of brush wear deposits the carbon dust everywhere. A thorough clean of the brass sleeves which the brushes run in can make a surprising difference to the contact force on the commutator.
3/ Radiusing the brush tips to fit the commutator can help matters. They are flat but off-set when new – the commutator is round, so a marginal contact at best.
Can’t beat a set of fine finishing files for a job like this.
Penguin45.
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