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DeWalt DCD771C2 Chuck Replacement

What you need

  1. DeWalt DCD771C2 Chuck Replacement, Chuck: step 1, image 1 of 1
    • Loosen the chuck until it is all of the way open.

  2. DeWalt DCD771C2 Chuck Replacement: step 2, image 1 of 1
    • Use a Torx T20 screwdriver to remove the screw in the center of the chuck.

    • This screw is left-hand threaded, so you will need to turn clockwise to remove the screw, rather than counter-clockwise.

  3. DeWalt DCD771C2 Chuck Replacement: step 3, image 1 of 3 DeWalt DCD771C2 Chuck Replacement: step 3, image 2 of 3 DeWalt DCD771C2 Chuck Replacement: step 3, image 3 of 3
    • Now take a 8mm or larger Allen Wrench with your dominant hand, and insert it into the chuck.

    • Spin the chuck clockwise to tighten the allen inside as tight as it will go.

    • Set the gear box selector switch on the top of the drill to 1.

  4. DeWalt DCD771C2 Chuck Replacement: step 4, image 1 of 3 DeWalt DCD771C2 Chuck Replacement: step 4, image 2 of 3 DeWalt DCD771C2 Chuck Replacement: step 4, image 3 of 3
    • With your nondominant hand lay the drill flat on the edge of a table such that chuck hangs off the edge. Hold the head of the drill tightly pushing it against the table (not the part with the battery).

    • With your dominant hand, take a rubber mallet and strike the Allen Wrench hard. You want to hit the Allen wrench so that it will move counterclockwise in reference to someone looking at the face of the chuck.

    • It may take more than one hit but the chuck will spin easily once broken free of the threads of the drill spindle. Use the Allen wrench to spin the chuck counterclockwise until separated from the drill.

Conclusion

To reassemble your device, follow these instructions in reverse order.

4 other people completed this guide.

Emily Passey

Member since: 04/12/16

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2 Guides authored

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Cal Poly, Team 25-5, Maness Spring 2016 Member of Cal Poly, Team 25-5, Maness Spring 2016

CPSU-MANESS-S16S25G5

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10 Comments

My chuck is ceased in the closed position and I am unable to open it.

Is there any way to open it ?

davidcartwright4155 - Reply

My chuck was stuck partially open. Could not back the retaining screw all the way out. I had to cut the chuck off with a grinder.

Gary Panepinto -

Horrible directions. “Toward you” doesn’t make sense. Establish a frame of reference (facing the chuck) and state clockwise and counter-clockwise. That does make sense.

EDMOND THOMPSON - Reply

My drill has a hex screw holding the chuck on… not a Phillips screw shown in the videos. I cannot get the 7/64 Allen wrench to loosen the “reverse thread” screw. Afraid I will break the Allen wrench.

Dwayne - Reply

I have removed the set screw from the chuck, installed a large Allen key tightened the Chuck, smacked it with a rubber mallet as hard as possible, the chuckwill not come free, just ratchets. What is the next step?

Don Godin - Reply

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