Question about Bosch 4000 - 07 Electric Table Saws

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Bosch 4000 my table saw seems to reving out of control , i have replaced the speed control and the brushes. can anyone help. Thanks Ben

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  • Bosch Master
  • 885 Answers

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.

Posted on Feb 10, 2012

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Posted on Jan 02, 2017

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rowdy45176
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SOURCE: Bosch 4000 table saw won't work

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

rowdy45176
  • 2176 Answers

SOURCE: Bosch 4000 table saw. The saw stopped while

If you are mechanically inclined and it sounds that way do you have a volt ohms meter?? If so start at the cord and check the continuity to the brush holders. Why did you replace the field? You might have had a stuck brush or some other problem. Make sure the brushes move freely in the tubes and also look for discoloration on the commutator of the armature. Let me know what you find and I will try and help you thru the rest of it.

Posted on Aug 25, 2009

  • 11 Answers

SOURCE: I have a BOSCH 4000 table saw which spins very

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).
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.

Blow motor out regularly with compressed air !!

Posted on Aug 25, 2010

  • 130 Answers

SOURCE: I have a bosch 4000 table saw and when it's

You need to replace the speed control unit.The speed control is part number is 2610997306 and it is available from http://www.ereplacementparts.com.

Posted on Jan 16, 2011

rowdy45176
  • 2176 Answers

SOURCE: bosch 4000 10" table saw

this saw does not have a breaker overload. Let it cool down and see if works, if not then you have an electrical issue that would need to be diagnosed.

Posted on Jul 12, 2011

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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

May 23, 2014 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Bosch 4000 table saw motor schmatic


http://www.ereplacementparts.com/bosch-4000-0601476139-table-saw-parts-c-128_167_168.html
I have found the most common issue is a bad field with the second being a bad rear armature bearing and last being a bad speed control.
Most of the time slow speed or even running backwards is a bad field (part #2 on the breakdown) #1619PA5590
Remove the cap on the end of the motor & the 2 carbon brushes.
Remove the 4 screws holding the motor to the frame and pull it straight off.
Check the bearing on the end of the armature to ensure it is not frozen or stiff. If it is also check the rubber boot that sits over the bearing and the motor housing itself to ensure it is not melted.

Dec 18, 2013 | Bosch 4000 - 07 Electric Table Saws

1 Answer

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

Dec 11, 2013 | Bosch Saws

1 Answer

My Bosch 4000 table saw will not stay running, it starts then it will just stop. it is not tripping the breaker, any sujections?


The motor control electronc control board ($40.00)is the most likely culprit. When you replace the electronic speed control board be sure and replace the brushes also as they will have very tiny pitting damage ($5.00)
What happens is that when the motor cooling port sucks in the saw dust contaminants the motor brushes and armature develop an intermittent contact which damages the operational characteristics of the control board - so blow motor out often with compressed air to remove contaminants. Don't ever operate this saw without a vacuum saw dust evacuation system (Shop vac,Etc.)!!

Aug 11, 2010 | Bosch 4100 09 10" Worksite Table Saw...

2 Answers

Bosch 4000 table saw will not start. I changed the switch and still won't start, not even a sound. The saw is relatively new, and the outlet works. What should I try next?


A real 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.

Feb 22, 2010 | Bosch 4000 - 07 Electric Table Saws

2 Answers

I have a BOSCH 4000 table saw which spins very slow. I opened the motor took out the field to examine. When I tried to reassemble it, I faced some problem. There are two wires from field, one connects to...


There is 4 wires from the field, 2 reds a white and a black. the reds have spade connectors on them, they go to the brush holders. The white goes to the white on the speed controler and the black goes to the black on the speed controller. There is one wire from the speed control that goes on to one of the brush leads, there is a small adapter that allows both wires to be connected. If the motor spins very slow then the field is faulty and needs replaced.

Hope this helps

Feb 11, 2010 | Bosch 4000 - 07 Electric Table Saws

2 Answers

Hi it seems like their is no power but their is, the motor is very hard to turn by hand? I'm assuming the bearings are gone. what do you think any history on these similar problems


bearings in a table saw are always a problem, but the replacement cost is cheaper than a new saw, but also if you have possibly overloaded or tried cutting with a dull blade the electrical system might be out. I would think the bearings first though.

Dec 27, 2009 | Bosch 4000 - 07 Electric Table Saws

2 Answers

Bosch 4000 table saw won't work


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

Jan 15, 2009 | Bosch 4000 - 07 Electric Table Saws

2 Answers

Bosch 4000 tablesaw suddenly ran backwards and died


I had a customer bring me a saw with this same problem. All components tested OK on my growler. I went on a limb since the speed control and the armature tested OK. I replaced the feild since to me it seemed to be the only component that could cause the motor to run in reverse. Tool now works properly and have had no more problems with the tool.

Dec 02, 2008 | Bosch Electric Table Saws

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