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Trigger Switch needed.

I am looking for a Trigger Switch for my B-D 7390 Type 4 circular saw.
Part number 380779-00
The few websites I have found say the trigger is discontinued… I can’t believe this trigger switch doesn’t exist somewhere!

Any help would be great!
Thanks

Posted by on

  • David Ford
    David Ford May 11, 2010

    Are there any names or numbers on that old switch, I was goofing off and came up with another idea. Let me know

  • David Ford
    David Ford May 11, 2010

    I have struck out on 6 different sites, so my next best solution is if you have a repair facility in your area take the switch and see if they can match it up with someone elses switch. Good luck and sorry I don't have better news

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You more than likely have a break in the field. In order to test this you will have to take the field out of the motor. There will be 4 terminals on one end of the field. Test between 2 terminals of one side of the field. You should have continuity. Then test the other side. (By side I mean the windings will be seperated one on each side.) The most common problem with these saws is that the field wire at the terminal comes loose from overheating. You may be able to scratch the wire up a little (because it has epoxy on it) and then solder it back to the terminal. (Originally the wire is pressed into a slot in the terminal, but this will be broken, so you will have to solder it for it to make contact and stay) It will save you some money from having to buy a new field. Eventually though you will have to replace the field and make sure that there isn't a running short between the field and armature that caused the overheating in the first place.

Posted on Oct 13, 2009

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