Open the chuck wide open. In the center is a retaining screw, they usually have left hand threads. Remove the screw. Take an allen wrench1/4" to 3/8" in size and fasten the short side tightly in the chuck. The chucks are usually right hand thread, so take a small hammer and strike the allen wrench to turn the chuck to the left to loosen it. Once you have the chuck off, verify the thread size of the drill motor shaft, then go to McMaster-Carr and choose the one you need.
Possible reasons for this behavior:
Blinks Long (Red Light): If your battery is too hot, the charger will blink the red light rapidly and for an extended duration. To prevent this, ensure that your battery is not exposed to direct sunlight or excessive heat. Give it some rest to cool down.
Blinks Short: If the battery is too cold, it will blink short and fast. This could be due to prolonged exposure to cold temperatures or the battery being idle for an extended period. Allow the battery to charge for a while or bring it to room temperature to resolve this issue.
Blinks Very Fast (Doesn't Go Away): If the light is blinking very fast and persists, it indicates that your battery has gone bad and needs replacement.
A photo would greatly help with your issue, are both wires still attached to the capacitor?? in not, the capacitor must be replaced with one of the same value,
if the capacitor is ok, look for a wire with solder on the end but nothing else attached to it, or a solder point on a card with a hole in it or a solder joint that has broken free from the card,,, if you can solder well, and have the equipment,. it is good at this point because You'll need to re-solder them back together,,
again a photo will help me greatly in telling you exactly how to fix
https://www.youtube.com/watch?v=pNDgV_6k12E
Reverse and Forward Mode: Try putting the drill in reverse mode and hit the trigger, then forward mode. If that doesn't work, tap the tip on the driveway but don't slam it. It should release .
Use a Wrench: First, make sure that the chuck is in the locked position. Next, use an allen wrench to loosen the set screw on the side of the chuck. Finally, unscrew the drill bit from the chuck .
Remove Chuck Collar: Use a wrench or pliers to loosen the chuck collar and remove it from the chuck. Then, use a screwdriver or other tool to remove the chuck jaws and any other components that may be blocking access to the stuck drill bit. Once these components are removed, you should be able to access the drill bit and remove it from the chuck .
It's going to be a zener diode, that's the easy part, you will need to know the voltage as well, only way to know that is find a good charger and measure the voltage drop across the diode with a multimeter or find a schematic.
Here are the wire placements for the switch of a DeWalt DWD520 hammer drill:
The red wire from the motor goes to the top left terminal on the switch.
The black wire from the motor goes to the top right terminal on the switch.
The white wire from the power cord goes to the bottom left terminal on the switch.
The black wire from the power cord goes to the bottom right terminal on the switch.
It's always recommended to double-check the manual or contact DeWalt customer service for confirmation, as wire placement may vary depending on the specific model and year of manufacture.
The red light flashing at the rear of your DeWalt D26501 could indicate a few different issues with the tool. Here are some potential causes and troubleshooting steps you can try:
Battery issue: If you're getting full power but the tool won't run, it's possible that the battery is not delivering the correct voltage or is not making proper contact with the tool. Try removing the battery and reseating it firmly in the tool, making sure it clicks into place. If the battery is still not delivering power properly, try charging it fully or using a different battery to see if that resolves the issue.
Trigger issue: If the red light flashes but the tool does not run when you press the trigger, it's possible that there is an issue with the trigger itself or with the wiring connecting it to the motor. Try checking the trigger for any visible damage or debris, and make sure it moves freely when pressed. You may also need to check the wiring connections inside the tool to ensure they are secure and not damaged.
Motor issue: If neither the battery nor the trigger seem to be the issue, it's possible that there is a problem with the motor itself. This could be caused by a number of factors, including a burned-out motor or a malfunctioning component inside the tool. If this is the case, you may need to take the tool to a professional technician or contact DeWalt customer service for assistance.
Overall, troubleshooting issues with power tools can be challenging, and it's important to take appropriate safety precautions when working with them. If you're unsure about how to proceed or are not comfortable working on the tool yourself, it's best to seek professional assistance.
A small part that helps the switching is probably broken.
Go to the dewalt site and the service online in order to find the faulty part. It would be cheap if you want to buy it. Your can repair it by yourself.
There is a torx headed screw inside the chuck that is reverse thread (Right hand to loosen) - remove that then the chuck will spin off standard thread (Left hand loosen)
Most of the time I chuck a 1/2" allen wrench into the chuck, mount the drill in a vise, and strike the wrench with a hammer to get the chuck off
Try some DW 40 in the switch might have something init stopping it working might flush it out . if not you may have to take a part and have a look at the switch
