My dc927 chuck is jammed fully open and won't move. How can I lossen it. Regards George

Hold the chuck and run the drill either forward or in reverse until the chuck is fully closed or open then reverse it while holding chuck.

inside the chuck you will see a screw, remove the screw and chuck . A small punch with minimum forced with a small hammer to move the chuck dogs toward the end on the chuck . The chuck was opened to far and is a mechanical bind ..

The large black part of the chuck should turn left and right to extend (close) and retract (open) the three chuck teeth that hold the bit in place. Turn the chuck to open it far enough to get your bit fully in the chuck then turn it closed to hold the bit in. When the teeth make contact turn the chuck a bit further to get it tight enough that the bit won't slip. When you get used to it, sometimes it's easier to hold the chuck lightly and turn it by lightly squeezing the trigger to turn the chuck with the drill motor.

Hello, W/D here.

To remove your chuck, open the jaws of the chuck fully, but don't open them so tight that they lock in the open position. Remove the screw inside the chuck. Spray the inside of the chuck with penetrating oil. Tap around the edge of the chuck, while pulling it away from the motor.
It should come right off, with a little effort.

Best regards, --W/D--

Hello, W/D here.

Open the jaws of the chuck fully. Remove the screw inside. Apply penetrating oil to the inside. Rap the chuck with a plastic hammer, working your way around the chuck, and applying a pulling pressure.
Should come right off.

Best regards, --W/D--

Hello,

Lubricate the jaws with WD-40 or similar, and then rap the chuck with a rubber or plastic hammer. Then try to move it. It may take several tries.
Best regards, --W/D--

It's just jammed in fully open position, take a set of channel lock pliers around the chuck and unstick it .

If it won't fall out with the chuck fully open, you'll have to remove the chuck. use an allen wrench larger than the jammed bit and lock it into the chuck. Hit the allen wrench with a soft hammer to loosen the chuck. Remove chuck completely and push the bit out from the bottom.

hold the back of the chuck with channel locks or a vice and use the same channel locks on the front and open the chuck manually it should work and you can get to the screw to replace it or the hand chuck. this can be a little frustrating but hang in there and you'll be a pro shortly.

I have a DC927 and a DC926 that I removed 1/2" Rohm Supra SK key-less chucks on. This process is pretty simple. Put the drill motor in 1st gear. Put the clutch ring in drill mode and not in driver or hammer. Reverse or open the chuck all the way. Hold the chuck firmly in a vise and give the drill a good POP counter clockwise. The last step can also be done with a pipe wrench by placing the drill on a work bench and turning the chuck counter clockwise. Continue to un-thread until the chuck is removed. The replacement chuck must have the same mounting process and mechanism. Put a few drops of locktite on the threads and thread the replacement chuck back on. Tighten the chuck using the vise or pipe wrench. Place the short end of an allen wrench in the chuck and tighten down on it. Placing the drill on a work bench, strike the allen wrench with a mallet to finish tightening and locking down the chuck. Congratulations, you have just changed out your chuck.