My DeWalt DWD520 Hammer Drill stopped working. Is there a breaker or an internal fuse I need to replace? The drill is only a few months old. Is this common?

Here are the wire placements for the switch of a DeWalt DWD520 hammer drill:

1. The red wire from the motor goes to the top left terminal on the switch.
2. The black wire from the motor goes to the top right terminal on the switch.
3. The white wire from the power cord goes to the bottom left terminal on the switch.
4. 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.

Open the jaws and insert a Torx 20 driver. The thread is counter clockwise.

The high-speed motor of DEWALT DCK299P2 Hammerdrill & Impact Driver Combo Kit gives you great power and precision. You can switch through three different speeding options from 0 to 2000 RPM. It provides you the access to all metal transmission. You can increase the speed with the impact driver to a maximum of 3600 RPM.

The hammer inside the drill head are most likely damaged ans/or broken, it is likely the best thing to do is just replace the tool.

Look at eReplacementParts.com and the parts diagrams

Even though it is only 6 months old, the battery could be faulty here as it seems it is not holding any charge.

The brushes might need to be replaced. You can find them on Ebay and are easily to replace.

Replacing the brushes would be the first step. You can find them on E-Bay and is easy to replace.

Yes there is I looked and the model number posted is a demolition hammer, so you might want to recheck before checking, but go to Dewaltservicenet.com and in the middle of the page it will ask you for parts or below that manual, go to manual and type in your model number and you will get an explosion and current pricing for this tool. Let me know if I can help I work on their demolition hammer on occasion. Good luck

You have burned out the drill motor, it is shorted, the battery smoked due to a direct short, one thing I don't understand why the thermal limiter didn't trip in battery pack, I would contact manufacturer and try to get hem to buy you a new drill.