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Asko W640 drive motor fault - fixed I hope!


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5 replies to this topic

#1 TimScott

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Posted 05 January 2012 - 06:23 AM

This front loader is 12 years old - this is the first time anything has ever gone wrong with it.

Serviceman replaced brushes and hose - still had fault at the end of the 1st wash of the day - ie wash would almost finish. 2nd wash of the day could not be run until the machine was rested usually for about 45 minutes and would then fail earlier in the cycle than the 1st wash.

Cost at this stage was $250 so decided to take machine apart.

Phoned Asko australia for assistance and was told that I should have used an asko qualified serviceman in the first place - closest 110 klm away - most unhelpful.

Removed motor and noticed dirty, rough, burnt looking commutator - removed new bushes and polished commutator on lathe - 1200 wet and dry and some wd40 - re fitted bushes and motor and now have a happy machine!

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#2 RegUS_PatOff

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Posted 05 January 2012 - 09:35 AM

GOOD JOB :dazzler:

there are "Commutator Cleaners"
they look like long Brushes, that you place into the Brush Holder and turn the Motor, and it "buffs" the Commutator
.

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#3 Samurai Appliance Repair Man

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Posted 05 January 2012 - 10:27 AM

Nice work, my fine young apprentice! If you happened to take photos of your repair odyssey and post them here, it will earn you a Merit Apprenticeship. :)

#4 TimScott

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Posted 11 January 2012 - 08:18 AM

Machine worked perfectly for 3 weeks then stopped completely - drive motor fault again, but this time the motor refused to start.

Pulled machine apart again - removed MCU and checked voltages etc from PCU - all OK

Then checked motor - stator winding OK but open circuit on armature.

Removed motor, fiddled with plug and wires and got a reading on the armature!

Bench (floor) tested motor using the testing programs - could not get motor to fail.

Machine is back together again - fingers crossed.

Commutator appears to be very dirty - what might be causing that?

Photos:

https://plus.google....CPHE_ri90ZLjiwE

#5 Samurai Appliance Repair Man

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Posted 11 January 2012 - 09:02 AM

That entire motor looked to be in pretty rough shape. One of your photos showed lots of rust on the housing. The commutator will be affected by ambient conditions that created that rust on the housing as well as by the wear of the brushes. You may just be seeing lots of carbon from the brushes on the commutator. You can buy a special commutator cleaner to clean it up a bit. Black residue isn't as big a deal as pitting-- if you have a lot of that, you may need a new motor.

PS great photos! I'll upgrade you as soon as I get back to my desktop. :)

#6 Samurai Appliance Repair Man

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Posted 11 January 2012 - 11:18 AM

Tim, for posting the story of your repair odyssey and the photos to go with it, you have earned a promotion to Merit Apprentice Appliantologist together with all the rights and privileges thereof.

Kanpai! :samurai:




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