Cordless Drill: Grinding or Squealing Sound
If your cordless drill is making grinding and squealing sounds, it might sound alarming, but it can actually be an easy fix. Use our list of common parts associated with this issue to determine where the problem is coming from. Our expert technician has provided solutions that you can do on your own. Always refer to the owner's manual provided by your manufacturer for information on your specific model.
Insert the proper screw driver into the drill chuck and snug the chuck up against the screw driver and remove the chuck screw remembering this screw is reversed thread. So turn it clock wise. Next, insert a large allen wrench inside the chuck and tighten the chuck down on it. Hit the allen wrench with a hammer to loosen, or place a pipe over the allen wrench for leverage. Make sure you have the transmission set to the lowest setting before removing the drill chuck and motor. Next, remove all the screws on the cover securing it to...
Insert the proper screw driver into the drill chuck and snug the chuck up against the screw driver and remove the chuck screw remembering this screw is reversed thread. So turn it clock wise. Next, insert a large allen wrench inside the chuck and tighten the chuck down on it. Hit the allen wrench with a hammer to loosen, or place a pipe over the allen wrench for leverage. Make sure you have the transmission set to the lowest setting before removing the drill chuck and motor. Next, remove all the screws on the cover securing it to the housing as well as the screws securing the transmission clutch assembly. Remove the cover and the transmission clutch assembly. Pull the gear selector switch out and separate the motor from the transmission. The two should just pull apart; you may have to twist a little.
With most models, the planetary gears are visible when you separate them. Inspect the gears for damage. If there is damaged on the gears then replace the transmission. If you can, spin the transmission with your fingers and get a feel and a listen. If you suspect the inner workings are badly replaced. Marry the motor to the new transmission or the old one that you have cleaned out.
Reinstall the gear case and motor back into the housing aligning it up properly to lock into any grooves in the housing. Reinstall the gear selector switch. Reinstall the cover back onto the case making sure all the wires are tucked inside the channels inside the housing. Reinstall the transmission clutch assembly to the case. Snap the brush springs back into place and reinstall the rear cover. Reinstall the drill chuck hand tight. Install the screw back inside the chuck remember it is reverse thread so turn counter clockwise to tighten.