18v dewalt when trying to use the keeyless chuck the shaft is way exposed it dosnt look right how do i get it back to normal so the srew gun will work the black part with the numbers on it is about 1 inch away from the yellow part of the gun there is a shaft showing inbetween hope u can help
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open the chuck right up and look for a Phillips headed screw at the bottom. This is a left handed screw which means that you will have to turn it in the direction as if you are doing it up to undo it. On the shaft there may be a flat section on the drive shaft that you can use a spanner on to hold the shaft and use a pair of multigrips undo the chuck normally. If there is no place you can hold the shaft you may have to take the front of the drill off to get to the shaft so you can hold it there.
The chuck on your drill was made to be taken off with a special jig and holder that cost $175+. Depending on how tight and how much lok-tite the factory used some chucks can be removed without the jig. You need a hex shaft at least four inches long and 3/8" to 1/2" wide. Lock the hex-shaft tightly in the chuck, then put the shaft in a vice with the drill straight up and down. Using very firm and steady pressure, turn the drill using the handle for leverage until the chuck breaks free. Don't bounce the pressure or use an impact wrench as this is very ******* the transmission. When you put the new chuck on, use a few drops of lok-tite and put it on as tight as you can without breaking the case. Let the lok-tite set up for at least one day.
My solution when the other mentioned ideas didn't work was this: I removed the 7 Torx #20 screws ( a common screw driver will work as well) and removed the housing half to expose the shaft. The chuck shaft bearings and gear lifts out as one assembly. Directly behind the chuck there is a half inch section of shaft exposed. I mounted a vise grip on the shaft (won't hurt it) and clamped the affair in a bench vise. With a 5/16" allen wrench mounted in the chuck and using a mallet I spun the chuck off with a solid smack counter clockwise . Very simple and easy .
this is not a common problem with dewalt. I have been using them in my construction business for years and only heard of this once or twice. I would go to their web site and get the number for their customer service. They stand behind their products and im sure they will help in every way they can to repair the drill
Here is the parts diagram. I hate to say it but I always have problems getting the chuck out of the clutch/transmission without breaking something. I havent figured out how to keep the spindle from moving while I try to turn the chuck. Sorry if this doesnt help much.
The dc925 and the current model dcd950 along with several other models of Dewalt 's line of cordless hammer drills DO NOT have a screw inside removal requires a CHUCK REMOVAL FIXTURE part # 233804-40 also you can't use a generic replacement chuck. As of 2/2/2010 the prices on the Dewaltservicenet web site are $72.74 for the tool and $69.70 for the chuck, part # 330075-90.