Question about Bosch 4000 - 07 Electric Table Saws

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Bosch 4000 table saw won't work

I attempted to repair my bosch 4000 table saw, which would not work at all. I took out the brushes and blew the motor out with air. then I put the brushes back in and it worked but was bogging down on its own with out a load on it. So I inspected the brushes and they were pritty worn. I bought new brushes (same as old ones) and put them in. Now the saw doesn't work at all. It has power but does nothing. what do you suppose the problem is? should i take apart the motor and clean it? what do you recommend?

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  • Anonymous Mar 13, 2014

    how to replace brushes in my bosch 4100 table saw motor

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OK sounds like you are handy. You have electric to the brush tubes? (first unplug saw to test) If yes then I would remove the brushes to see if they were making contact with the commutator. Does the blade spin freely? If not you might have a bearing problem. I would again use air after removing the brushes and then reinsert making sure they seat on the armature. If still nothing then if you are comfortable I would pull the motor housing. But before pulling go to Bosch Tools website and downloading a breakdown of your saw. Let me know if I can help

Posted on Jan 15, 2009

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Weakness of this saw is sawdust and debri entering the cooling ports of the motor causing intermittent contact of brushes which damages the motor speed control board ($40.00). Don't ever operate this saw with out a vacuum saw dust extraction system. Also when you replace the Speed control board also replace the Brushes ($6.00). It helps extend the operational life of the motor components to blow out the contaminants regularly with compressed air through the motor cooling ports (turn off saw first).
You can bypass the speed control board (if you want to disable this wonderful engineering feature by attaching black and white power wires directly to the black and white wires to motor.

Posted on Aug 25, 2010

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