Speed Control

[ethompson3542]

Hello my Bosch 4000 is great, but the motor has stopped working. Switch is fine, and the armature looks fine as well as the brushes and commutater. I am left with one thought, could it be the speed control? Will the speed control cause the motor to stop working?

[WJA]

Hello ethompson3542,

If all the electrical components have all check okay. Your best bet would be to replace the speed control. It is a PC board that controls the motor's speed when under a load and gives you optimum power when needed. It has in it a circuit breaker/overload to protect the motor from overheating and damaging it.

Hope that helps,
WJA

[mendingshed]

Usually if the motor is running slow and backward it is because the crossover wire in the field has shorted out and the field not the speed control will need to be replaced.
the speed control will not make it run backward. that is cause by the field being shorted out.

[thominkentuck]

I recently bought a Bosch table saw ( used ) and looking at this forum for information. Wondering - where is this "Speed Control" located on the saw? I don't see it ... even in the drawings. Wanting to learn as much as I can before something goes wrong!

[WJA]

Hello thominkentuck,

If you pull the parts diagram by clicking on the model Bosch 4000 below and find item number 12 you will be able to get an idea on where the 2610997306 speed control is located.

Hope this helps,
-WJA