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Re: How to Remove Drill chuck from LxFD01 Makita drill
The screw in the bottom of the chuck is reverse threaded (left tight, right loose). It is also lock-tited so will be hard to remove. Make sure you have a screw driver well seated in the screw and turn it backwards (clockwise) to break it free. Once that is out, lock the short end of an allen wrench (at least 3/8" to 1/2") in the chuck. You'll have to lay the drill on a bench with the long end of the allen wrench hanging over the edge so you can hit it with a hammer hard enough to break the chuch free from the anvil. The chuck is threaded left loose, right tight so hit the wrench to turn the chuck counter clockwise. When you replace the new chuck use a small drop of lock-tite on the anvil threads and screw if it doesn't have some on it already.
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Sometimes if you happen to have the right size bit, it will stick into the bolt that holds the chuck on if the chuck wasn't tight enought to keep it from slipping further into the chuck. Clamp drill bit in vice and tap chuck with soft hammer to pull it free.
I think you will find that if you open the chuck fully you will see a cross head screw inside the chuck which you need to undo before removing the chuck. this secure the chuck from unscrewing while being used in reverse to undo screws. Once this screw is out a spanner is used at the base of the chuck to unscrew it from the shaft. this may need a short sharpe shock to get it to move.
if its a reversible drill there will be a screw in the bottom of the chuck, open the jaws as far as they will go and you should see a screw head, it is a left hand thread so put the drill in low speed selector this will stop chuck turning as easily, then turn screw clockwise as your looking at the chuck, when its out put an allen key in and tighten up the chuck hit with hammer now in a anti clockwise direction it should unscrew. repeat in the reverse procedure to fit new chuck....
Place drill in vice with chuck in vice facing up . Clamp chuck lightly but with enough force to hold firmly. put allen wrench in chuck and lightly tap down to make good fit to allen screw head.Clamp chuck jaws down onto allen wrench lightly to hold wrench steady. Take piece of pipe to end of wrench,10". These chuck screws are tight. Hammer clockwise until screw brakes loose.Open chuck completely and remove screw.Chuck is threaded to spindle shaft . Place allen wrench with long end facing out of tool in chuck and tighten chuck securely. With hammer tap allen wrench sharply counter clockwise ( normal thread.)
open the chuck all the way, insde there may be a screw in the bottom it's lefthand thread turn it clockwise to remove, the chuck is also threaded, right hand thread. close the jaws on the short end of an allen wrench and strike the long end with a hammer to break it free
If this is a newer tool it is probably a Torx drive screw usually a T20. The screw is LH thread and after removing it you will need to put some screws back in tool to remove the chuck. First shift the gear selector to the low setting and the clutch to the drill only. Next get a bent handle allen wrench about the capacity of the chuck install the short end of wrench in chuck and tighten. Put the chuck on a block or wood or a workbench to support is and turn the wrench to about a 30 degree angle in the counterclockwise position. The chuck has standard threads so you want to hit the wrench with a hammer to loosen it. This might take a few tries but it will work. Good luck