Hey!
I have a problem with the 2015 Makita DDF482, it works, but it smells like burning wires or something like that, listening how drill works, the turns seem to fluctuate. What could be the problem?
Hi,
The smell of burning /ozone could be something as simple as a dirty commutator. The carbon brushes are worn out and do not make good contact with the copper in the commutator, this produces the excessive sparks at the back of the drill, the carbon builds up and sparks as the drill turns and give the peculiar smell. Try cleaning the drill vents and commutator, oil, grease, dust, solvent, etc are a NO! NO! in this area, if that does not improve, change the brushes. Buy good quality replacements and clean the whole area again before replacing them. Bear in mind the new brushes will need to "bed in" so don't despair if at first you see some sparks. Assuming there is nothing really wrong with the drills electronics (it is relatively new drill), the fluctuation in RPMs could be a combination of the worn out brushes and/or depleted battery pack. Depending on the charge/ discharge cycles the battery pack has undergone, it could be that some NiCd batteries do not fully charge or hold their charge for long. The result is that as the drill operates at a lower voltage than rated and with fewer amps available, the battery pack struggles to deliver the power needed to turn the motor, so you notice some fluctuation. Does the drill struggle to drill through thin metal? Does it get stuck? There is a possible answer
Check the lubrication of the planetary gears assembly, poor lubrication/ dry grease will further load the motor, making it run slower.
Hope this helps you resolve the issues
