Question about Black & Decker String Trimmer Cordless 12" 18V

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CST2000 Grass Hog Cordless Trimmer/Edger stops working until shaken

My CST2000 stops working often, and only shaking it will get it to start again. Is this possible to fix, and if so, would it cost less than buying a new trimmer/edger?

Also, I tested the battery with a voltmeter, and it's reading the full 12 volts. Is it possible for me to buy just the trimmer/edger part without buying a whole new unit?

Thanks in advance for your help.

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  • Joel Just Jul 26, 2008

    Before reading your post, we actually found this ourselves when we opened up the motor housing, but your solution was exactly right. The connection needed to be soldered into place.

  • GWIXOM Aug 09, 2008

    I have the same problem and it turned out to be related to the interlock switch that the battery assembly causes to be activated when you push the switch. Also the housing just below the battery assembly has a crack in it (allowing flexing) making the activation of the switch intermittent. and I believe in my case this is what the real problem is. I did find a web site that sells parts for the CST2000 (some parts are not available, and others take several months to get. Search for "toolpartsdirect.com then search for CST2000 parts.

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Open up the motor housing maybe loose connection between the terminal & motor. for parts & diagram see www.dewaltservcienet.com look for the icon find it now & enter the model #

Posted on Jul 26, 2008

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It does not turn on even if it was charged for 24 hrs


When it charges, does the red light come on on the charger? Some of the CST2000 chargers make bad connections, and they don't actually charge.

Make sure the red light is coming on when you're charging the battery. If the light is coming on and you still can't use the trimmer after charging, you'll need either a new battery or a whole new battery pack (the black handle of the trimmer).

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how long is a peice of string!!!!! how oftern do you use it as the charge will always die what ever

Jul 16, 2010 | Black & Decker Cst2000 12 - Volt Cordless...

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How to put together the CST2000 and install a battery


Which part of the Grass Hog did you take apart? If you mean the spool head, that is easy to reassemble. The actual spool (the round part with the line coming out) goes into the cavity on the bottom of the trimmer, with the line poking out of the hole in the side several inches (not enough to hit the plastic guard). Then the cover (orange with the spring on it) fits on top of the spool so that the spring pushes on the spool and the two tabs on the side snap into the holes in the trimmer.

Unless you took another part off, that should be all you need to do to reassemble the Grass Hog. Turn it right-side up and turn it on to make sure everything works.

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Apr 17, 2010 | Black & Decker Cst2000 12 - Volt Cordless...

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Weed whacker


I was unable to get that ring off also... I was able to pull plastic side apart far enough to pull motor out and "rewire" it. Even fit back in when I was done... just barely. and was very gentle...

I do not know how to get the ring apart, though.

Feb 01, 2009 | Black & Decker Cst2000 12 - Volt Cordless...

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