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Hi, I have a makita 9227c polisher/sander that quits after about 5 min. of use and then it goes on and off when I depress the switch at times. I replaced the brushes already since they were the cheapest and most common in power tool faults that I've encountered, however it still has the same problem. Do you think that the fault is in the switch? If so how do I check it? thanks
Hi hope to help
Have you tried this unplug the machine! then cut the cable about 6" from the machine then strip the machine and rewire the long length of cable back to the switch. The 6" that has been cut from the machine discard it.
The problem i used to get is where the cable is clamped in the handle the wire inside the insulation cracks so that when the machine is in one position is ok but then when is moved it goes off again.
It also could be the field coil (part of the motor) if it gets hot then cuts out the field could be braking down!!!
hope this helps.
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sounds like you have a problem with the armature. To easily check UNPLUG tool and turn the spindle by hand and listen for the clicking. It sounds like it may be a raised commutator bar. You can also remove the brushes and look into the brush tube with a flashlight and look for a major discoloration of the bars or one that is raised.
the part number is 224517-1 and you should be able to find it at any hardware store that sells Makita tools or you can buy it online from "makitausa.com" they also have a service center locator that you can use to buy it locally. Let me know if you need more assistance.
could be a couple things. UNPLUG tool and remove one handle half and see if it is jammed up with lambswool from the bonnet. It can get under the brushes causing the erratic power. If thoroughly clean the entire motor housing and then remove and check the brushes for wear. Let me know if you need more assistance.
possibly ripped the wires from switch or broke the wires in the cord itself. You can go to Makitatools.com for a breakdown on this tool, but would have to guess at the above.
try going to Makitatools.com and buying them direct from their site or find there service center locator for authorized repairs and buying them that way. Let me know if you need more help and if you do please furnish me with the zip code if you have one and the exact location and I will try and find someone local if I can.
Hi, Unfortunately there is no external test, It has to be opened and troubleshot with a multimeter. Especially something with a variable speed controller, power cord, brushes, switches, ect. It could be several things. If you are technical enough to take it apart let us know we will try to help. Good Luck to you!
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