Question about Bosch 4000 - 07 Electric Table Saws

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My saw runs backwards too!

The Bosch 4000. Did you figure out what caused your problem? Mine had run fine for a year and a half.

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  • Anonymous Jan 21, 2009

    Mine runs backwards too! They tell me the field or armature. I don't think it should have happened at all. Any recalls? My saw is used sparingly and is only a year and a half as well. Rick0000

  • Anonymous Jan 31, 2009


  • kingsleyz Feb 16, 2009

    same deal for me.  It was unloaded and while running I actually saw it change direction! What in the hell?  I'm guessing speed controller, as the armature is fine, and the speed controller looks smoked

  • gmansplace Feb 18, 2009

    mine too. I used it on only one job. not too happy. any recall? other bosch saws i have worked with are great.

  • Anonymous Mar 21, 2009

    I've had mine for 2 years. Very light use. Spins backward at about half speed. No good flipping blade as it doesn't spin fast enough to really cut.

  • kentzollars Apr 02, 2009

    I was cutting a 2" piece of lumber & mine started going backwards

  • David Ford
    David Ford May 11, 2010

    by running backwards I assume the blade rotation is running backwards, not just the teeth? Second has someone worked on this tool recently? Please provide the information and I will try and help



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Try to put the blade in the other way. then see if it works.

Posted on Jan 02, 2009


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1 Answer

Bosch 4000 table saw motor schmatic
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

Bosh 4000 table saw runs backward and at low speed

I've worked on some table saws with problems like you describe, a couple needed a new speed control unit (Bosch PN 2610997306) in the motor. If all the wiring to and inside the motor is OK and not shorting out anywhere, that's the next part you should look at.

Jul 10, 2012 | Bosch 4000 10IN Table Saw

1 Answer

Just replaced speed control unit and saw still spins at very slow rpm, guessing 20-30. any other possibilties. any way to check if new control unit is no good?

With the saw unplugged, turn the saw blade.
If it turns easily with no hangups I would guess its the field.
When mine went bad the blade went backwards very slowly.
I replaced only the field and not the armature and it's worked fine for over 2 yrs.

Right now I have it apart to change an armature bearing which was completely frozen up.

Aug 29, 2011 | Bosch 4000 - 07 Electric Table Saws

2 Answers

Bosch 4000 table saw run backward and slowly

I had the same problem with the Bosch 4000.
Changed the field for a new one...end of problem

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

1 Answer

My table saw runs in reverse when turned on it is a 4000

This is unfortunatly a fairly common problem with the Bosch saws, the field coil has failed and needs to be replaced. If the saw is less than a year old it will be under warranty, if not this repair is still worth doing as it is alot less than a new saw. This repair is faily difficult and should be done by a Bosch service center, find one in your area and they will be able to help you.

Jan 01, 2011 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Just noticed my 5 year old bosch top handle jig saw doesn't speed up past 4 on the dial. Seems to only run at half speed. what does that sound like? thnks

It sounds like you may have a faulty speed governor. If everything else sounds fine, (no grinding or other strange noises) then that should be the problem. If there is grinding or odd noises there may be bearings that are seizing causing the tool to run slower.

Nov 24, 2010 | Bosch 1587AVSK 5.0 - AMP Top Handle Jig...

1 Answer

My 4000 started running backwards very slowly - is it a field winding or maybe the speed controller? And if it is the speed controller, where is it and can I bypass it to test it?

I am not aware of any speed controller on this tool. what I would do is unplug tool and turn it on its backside and look at the switch to see if possibly burnt causing problems.

Aug 23, 2010 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Bosch 4000 Table Saw running backward

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 !!

May 19, 2010 | Bosch 4000 Factory Reconditioned 10"...

1 Answer

My bosch table saw runs slowly backwards what part do i replace

Replace the field coil. I'm going to bet its a Model 4000. I have done about 100 of these saws in the last couple of years and my customers always complain of the same problem, "the saw was running backwards"

Change the armature back bearing while you have it apart, they always seize eventually.

Jun 23, 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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