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Dewalt DC925 Cordless Drill - Page 4 Questions & Answers
My Dewalt DWD460 slows down when I depress the trigger all the way. Why? A bad switch or Module??
If the speed control is the trigger, it is basically pushing the slider of a potentiometer up and down the track varying the control voltage to the speed control module.
Basically it is no different in principle to an old fashioned rotary or in-line volume control and just like a volume control the track can become dirty or wear out in places producing unpredictable and erratic operation.
Sometimes a thorough soaking with switch cleaner will restore the function.
Remove the chuck dc970
I'm assuming you have a DCD970 as DeWalt doesn't have a DC970 and the DW970 is an impact driver. The chuck on your drill is a new design that doesn't have a lock screw inside the chuck, they are put on very tight with lock-tite to hold them on. They are made to be taken off with a special chuck holder and vice jig that only service centers have. The allen wrench method used on older chucks won't work as the chuck will just loosen when you hit the allen wrench. I have on occasion removed one by doing the following: Turn the chuck fully open then secure it in a vice with the drill straight up. Holding the drill body and using the handle for leverage, turn the drill counterclockwise, as you are looking down on it, with steady, strong pressure. If the chuck breaks free it will spin off easily. If you are at all afraid you may break the handle you may have to take or send it to a service center to have it removed.
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