To replace the old keyless chuck with an electric drill with a new one, it is not at all necessary to take the tool to a service center. You can do it yourself.
Inside the cartridge itself is a bolt with a left-hand thread. And the first thing you need to unscrew it. We insert a screwdriver into the cartridge, and twist it clockwise.
Further, in order to remove the keyless chuck, it will be necessary to disassemble it to the metal part. To do this, between two plastic movable parts of the cartridge we start a flat screwdriver, and push them apart.
The main stages of work
After it was possible to slightly push the two parts of the cartridge with a screwdriver, insert some piece of steel plate into the gap formed and remove the upper part.
After that, remove the two halves of the clamping ring, as well as the thrust bearing. This can be done with your hands.
At the next stage, we disassemble the electric drill body and remove the shaft itself, on which the cartridge "sits". If this is not done, then removing the cartridge will be very problematic, since there are no flats on the shaft to grab it with a key.
Then the shaft needs to be fixed with clamping pliers ("dog"), and the metal part of the cartridge can be wrapped around with a gas wrench, after which we unscrew it counterclockwise.
Details on how to remove the keyless chuck from a drill can be seen in this video.
