Question about Bosch 4100 10" Worksite Table Saw

2 Answers

My saw is slowly running backwards and humming. I have already cleaned the brushes what do I do next to fix this. I am on the job site right now.

Posted by on

  • johnworleyii Jul 24, 2009

    Tried replacing field coil and it did not work. Blade is still running in reverse, while motor makes a hum. I talked to a tool repair company and an old timer suggested it may be the start up assembly. I thought that was the field coil, and I replaced that and it did not work. Any more suggestions. John Worley

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,865 Answers

Hello John. Your motor is shot. Replace it.

Posted on Jul 24, 2009

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,037 Answers

Replacing the field coil will fix your problem. I have see this done to about 100 of these saws in the last couple of years and 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. Let me know how this turns out.



Benjamin

Posted on Jul 22, 2009

  • Benjamin Patri
    Benjamin Patri Jul 24, 2009

    Well, usually it is the coil, there are only two other parts that can cause it to run backwards the speed control or the armature.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to replace brush holders on dewalt table saw dw745


There is a small allen screw in the field housing holding the brush holders in.
Most often I have found, if the brush holders are needing replacement the motor housing also needs replacement - they heat up and the plastic cracks.

Dec 26, 2012 | Dewalt DW745 10" Compact Job Site Table...

1 Answer

SOUNDS LIKE I HAVE THE SAME PROBLEM , WHEN i tapped it it does a 1/4 turn only


check motor brush,2 cap to unscew
with new brush check for spark in motor when running,if you have big spark,rotor have a problem

Jun 16, 2012 | Dewalt DW744XRS 10-inch Job Site Table Saw...

1 Answer

Skill saw stops cutting


First thing to check is if you got the blade on the right way. If it's backwards it will cut but it overworks the motor and can cause it to get hot and sluggish. Next check the condition of the brushes and where they make contact with the armature. If worn the same condition can arrise.

Jun 06, 2012 | Saws

3 Answers

Band saw motor won't start just hums


You will need to take the motor out and check the brushes on the back also check the bearings you may need to disassemble the motor to repair.

Apr 05, 2012 | Craftsman 12 Tilt Head Band Saw Owner...

1 Answer

My Husqvarna 455 starts great and sounds great without pressure but when you put the saw under pressure of cutting it bogs down and runs up and down. I am not sure the problem. I have changed spark plug,...


If you haven't done so already I would run some spray carb cleaner through it. If the idle speed is okay then I would adjust high and low screws going very slowly about 1/16 of a turn at a time and run engine up and down after each adjustment. I would remove the muffler and clean the spark arresstor screen to get all the carbon deposits out of it.Carb. cleaner and a medium stiff wire brush work well for this. I would also check the vent in the gas cap to make sure it is open. I also use a product called sea foam in all my engines.For my chain saws I mix 5-6 ounces with 2 1/4 gallon of gas.It really does a good job of keeping everything internally clean. Hope this helps you. Thanks.

Jul 28, 2011 | Husqvarna , No.455 Rancher, 20" Gas -...

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 Delta band saw motor is having issues. I was


I would bet it's the Motor Brushes.They are locaded on the housing of the saw, accesed by unscrewing the plug.The brushes are replaceable and your saw will be fixed.Where to buy replacents could be an issue,Check manufacturer or search power tool replacement motor brushes.If stuck you can try to unscrew the plug the brush is at the bottom engaging the motor armerure,there shoud be a spring keeping contact.Inspect brush condition it looks like a carbon block worn to the curve of the motor.Go online do a search on how electric motors work you'll see exactly what I'm explaining.Cheap part easy fix.Good Luck.

Sep 05, 2009 | Saws

1 Answer

Saw runs only after u turn the blade backward by hand 2 turns ?


You probably have a brush problem, Unplug the tool and remove the brush holders and check the condition. Give me the model number and I will try and get you a breakdown for this tool.

Aug 26, 2009 | Makita 7 1/4" Circular Saw 5007NB

1 Answer

Saw is rotating backwards can you help. its a power devil table saw


This happens with Bosch saws once in a while. The field coil in the motor short circuits. This causes the saw to run very slowly or sometimes run backwards. I sounds like yours has this problem. Unfortunatly the only way to repair the motor is to replace the field coil. This is a fairly involved repair and you might benifit from taking to a power tool service center.

Aug 05, 2009 | Saws

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

Not finding what you are looking for?
Bosch 4100 10" Worksite Table Saw Logo

Related Topics:

151 people viewed this question

Ask a Question

Usually answered in minutes!

Top Bosch Saws Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Parson's Repair...
Parson's Repair...

Level 2 Expert

206 Answers

Jim London
Jim London

Level 2 Expert

257 Answers

Are you a Bosch Saw Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...