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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2 Answers

Bosch 4000 table saw motor does not turn, very stiff


Possibly something has jammed inside the motor housing although unlikely.
Electric brake seized perhaps?
Carbon brushes need replaced?

These saws (and the newer 4100) have a history of motor problems, with the field winding and electronic motor speed control being the most common points of failure. If you go to an online tool parts supplier like toolpartsdirect- Bosch 4000 saw you will see a list of the parts available, as well as the most commonly ordered parts.

Thanks go to Jason for his blog post at:

http://mypeculiarnature.blogspot.co.uk/2013/07/bosch-4000-table-saw-fix-momentum-lost.html

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My Bosch 4000 froze up. Turns out to be the rear bearing. Replaced the bearing "6200ZZ" at the brush end. Works great now. If you are mechanically inclined, you may need a press to remove and install the bearing quickly.

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Bosch 4000 table saw tripped breaker. Went to turn saw back on and no power. I replaced the speed control board and still no power? I checked the switch and is fine. Any ideas?


Remove the cap on the end of the motor and remove the 2 carbon brushes. (Ensure the brushes move freely in the tubes and contact the armature)
Remove the 4 screws holding the motor housing to the frame and pull it straight off. Check the copper commutator on the armature and make sure it is not burnt.

22123698-wvjv2ek3boqiwefmtj30yfqx-1-0.jpg If armature and brushes look fine my guess is you have a bad field (very common problem in this tool) #1619PA5590

http://www.ereplacementparts.com/bosch-4000-0601476139-table-saw-parts-c-128_167_168.html


22123698-wvjv2ek3boqiwefmtj30yfqx-1-1.jpg

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The speed control on your table saw works by sensing what's going on in the field. If you replaced the speed control circuit board and the motor still runs out of control, the next item to replace is the field.

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Hi, I need a replacement motor for my Bosche 4000. Have you got one? Thx Al Benting


I would start at the following site:
http://www.ereplacementparts.com/bosch-4000-0601476139-table-saw-parts-c-128_167_168.html

They don't have the complete motor but certainly have the parts needed to ge the motor back in operation. They have the brushes, the field and the commutator plus other items related to operation. I would also recommend reading some of their articles (like a forum) that gives problems and solutions.

Good luck.

Mar 16, 2011 | Bosch 4000 - 07 Electric Table Saws

1 Answer

I have a bosch 4000 the motor is smoking and growling (like a bearing is going bad)


If the motor is smoking, yopu should not use it further. If it is a universal motor with carbon brushes, inspect the brushes for wear and replace. If the bearing is going bad, it has to be replaced. There is no easy fix for a bad bearing, except to replace it. You best bet would be to take it to a Bisch approved service center, or call them and get an estimate cost on repair. If too high it may not be worth repairing it over the cost of a new saw. If it is still under warranty, then demand for it to be serviced/repaired as part of that warranty.

Feb 28, 2011 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Hi motor smokes bosch 4000 will they replace it ? Mark


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1 Answer

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You can find the 4000 manuals and parts diagram at bosch tools online. You will need a new armture Bnew bushes and possibly field. I would also replace the bearings and motor speed control circuit board.
Bosch does not sell the motor assembly.
Turn unit upside down and remove the Plastic body - approx 6 screws.
Thake a digital camera and take LOTS of pictures of dissassembly as you will need them later. Blow unit clean and work neatly keeping all parts in labeled bins for reassembly. Don't attempt this job when your pressed for time.
Before you start check to see if this machine is still under warranty!!
Call customer support listed on website if you run into a problem.
Good Luck !!

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Mar 22, 2009 | Bosch 4000 - 07 Electric Table Saws

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