1.) Bosch 4000 Table Saw w gravity rise stand. Removed blade and then table saw from stand (4 bolts)
2.) Turned table saw upside down and removed plastic table support frame from cast table to access motor (4 allen-head cap screws & 2 small bolts).
3.) Removed brushes (2)
4.) Removed motor end cap (3 screws) to expose re
... Read morear motor bearing and wiring to motor field
5.) Removed motor housing from cast gear box/blade support (4 screws). Armature remained in gear box.
6.) Removed armature by pulling out of gear box and front bearing
7.) Removed front bearing retainer (2 screws) and removed bearing with inside puller. Replaced with new bearing and re-attached retainer.
8.) Removed rear bearing by cutting off with dremel and cutting wheel. The outer bearing had fallen off with ball bearings so only inner race remained on armature shaft and nothing for puller to grab to...so had to cut off.
9.) Replaced new bearing on shaft and cleaned armature with damp rag and a little brake cleaner.
10.) Removed wire nut caps from field wiring and rear motor cap (which contains speed control board). Removed 2 bolts that held field in motor housing. Removed field from motor housing by tapping out from rear.
11.) Replace with new field. Reattached wire nuts and tightened 2 bolts.
12.) Added grease to armature shaft gear end and reinstalled cast gear housing/blade support.
13.) Reassembled saw in reverse order
14.) Replaced saw blade
15.) Plugged in and ran like new. Parts for $100 saved my $600 table saw. Tool retailers wanted $300 minimum to begin repair which would be used towards the final repair bill. Glad I did it myself, but you should have some mechanical and electric motor knowledge and able to keep parts in order during disassembly.
I tried the speed control circuit board first and while difficult to stuff the wiring for it back under the motor\'s end cover, It didn\'t help to fix the problem.
Next I ordered the field and a set of brushes. The armature looked fine but I still sanded it down and cleaned the slots between the bars w/ a brass wire \"tooth\" brush
... Read more. The field was a very tight fit and difficult to pull from the plastic motor housing. And then, even harder to press back in and have the mounting holes be orientated correctly for the screws that went thru them. I finally took some 150 grit sand paper to the12 support fins in the plastic case and shaved them down just enough so the field would slide into its home a little more easily. All is well now. For $115, I have a mostly new table saw motor, which works like it used to. A local repair shop wanted 3 or 4 times that for parts and labor. Glad I tried to fix it myself.
With Table saw upside down, tilt saw blade to 45 degrees. Remove switch wire-stop where wire enters motor housing. Remove motor housing. Uncrimp wire connections with channel locks. Unbolt field and remove. Reverse order re-assembly, making sure new field wires exit internal motor housing together through access hole below the spinni
... Read moreng rotor of the motor. NOTE: Internal plastic splines of motor housing had to be sanded down in order for new field to slide into housing. NOTE: New brushes cause minor intermittent voltage drops until they wear down into the shape of the motor rotor.
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Saw ran at real slow rpm , no way it would cut anything
Removed motor from saw , disassembled motor, removed brushes, removed field from housing, installed new field, new armature, new speed control, new brushes . Installed motor in saw, reconnected on /off switch, plugged it in and turned tool on and bam! It worked !
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Table saw lost power and sparks were coming out of the motor
I was hoping replacing the brushes would do it. I found some at a local repair business and replaced them but had the same problem. They told me to check color of armature, if it was dark and not shiny the cost to fix would be to much and might as well buy a new saw. They were wrong. I spent a little over $200.00 instead of $600+. They se
... Read morell tools too, Looked on ereplacementparts site and followed the instructions that someone else put on the site that had the same problem. He did a great job of explaining everything and I followed his instructions and took my time so I didn\'t mess up or forget something. My table saw is working great!
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Loud noise, not sure which part fixed it, but didn\'t want to put it together twice
Remove back of motor. Pull end cap off motor. Unplug all wires. Remove two field screws and pull field. replace and put all back together. Remember to remove brushes so motor will fit over shaft.
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field became loose, and moved into fan blade on armature, cut field windings. i believe it was missing 2 screws from the factory
make sure tool is unplugged from electrical. remove end cap, disconnect wires. (3 Phillips head screws) remove 4 Phillips head screws on motor cover. twist and pull off, leaving armature attached to machine. remove (2) 1/4\" drive hex head screws, remove field winding from housing. reverse procedure to reinstall new field windings.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP19506023
Manufacturer Part Number: 1619PA5590
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