Dynabrade Sander Repair - How to Replace the Drop in Motor 

thankful for explained

Forma como nao desmontar e montar a ferramenta pneumatica

Any tips on unsticking the trigger button?

Estoy arreglando uno pero batallo para abrir, arreglo la que tiene doble función.

Tanks , estaba buscando como desarmarla

Never remove the motor lock ring with a flat head screwdriver and hammer. There's a good chance you'll either damage the motor lock ring or potentially cause injury. Purchase the OEM motor removal wrench, it'll save you from injury, time and potential damage caused to the tool.