Question about Makita 7" Electronic Sander - Polisher 9227CX3

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A makita 9227C does not work

My makita 9227c stopped working, Im trying to find a test procedure to determine if it is the switch or controller. is any thing like this available.

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  • mobileboatse Feb 20, 2009

    I do know how to dissasemble it and use a multi meter.

  • mobileboatse Feb 23, 2009

    brushes still have about 1/2" before the wear line, the spindle turns free, the power cord is bringing powwerr to the switch but it is not a ribbon wire from the controller there is the hot and neutral from the cord a paif of about 20ga orange a red, yellow, blue and white also about 20 ga. these are all conected to the switch.

  • kylec73 Apr 09, 2009

    My 9227C buffer recently stopped working also. I replaced the switch and brushes but still nothing. If you tap the head it tries to spin half a revolution or so then stops. Any ideas on what it could be?

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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!

Posted on Feb 20, 2009

  • Jim London
    Jim London Feb 20, 2009

    Hi, OK good, start with the obvious stuff first , check the brushes are not worn down to nothing, check that the spindle lock is free, ring the power cord and then you can check the switch and controller. The switch is connected to the controller with a ribbon type cable but with your meter you can still check the switch by moving the trigger and measuring the outputs. Since its variable it works like a strained gauge, it changes the resistance. That ought to get you in the right direction, let me know how it is going.

  • Jim London
    Jim London Feb 23, 2009

    Hi, Ok this is a first version so the switch is checked thru the field windings. Remove the brushes and check the windings first to make sure they are not open. Then measure resistance from one of the power cord leads to one of the brush housings and get a reading, pull the trigger it should change. If it doesn't it is the switch. Good Luck, hope this Fixsya! Let me know!

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Makita 9227c problem will only run upside down. I


...Jon sounds like broken cable in side the wire its self usually were the cable joins to the handle its self if u move the cable about u will b able to check this out wihlst running it .. i had this on mine i cut out the bad bit and re wired the it been fine now 1 1/2 years now

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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.

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Copy and paste this link in to your web browser search.
www.ereplacementparts.com

You should find it there.
Good luck...

Feb 24, 2009 | Makita 7" Electronic Sander - Polisher...

2 Answers

Makita 9227c stall


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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