The biggest disadvantage of DC motors is cooling. Most often, cooling is provided by an additional electric motor with a fan attached directly to the motor.

Motors are usually operated in harsh conditions where the air is full of impurities that pass through the motor via the cooling system. Impurities cause contact between the manifold lamellas, puncture between the commutation and the casing, uneven cooling, which causes the motor to overheat and thus lead to winding failure. Litter damages the sliding brushes, which in principle leads to a chain reaction of damage. Late repairs can lead to complete destruction of the motor.

Classic DC motor servicing includes:

  • visual inspection,
  • cleaning,
  • blasting,
  • dismantling,
  • stator washing/drying,
  • washing/drying the rotor,
  • stator implosion,
  • rotor impregnation,
  • resistance measurement with the Schleich MTC2,
  • rehabilitation of the collector - (ovality measurement, sawing, turning, louvres),
  • bearing tolerance measurement DE,
  • measuring the bearing tolerance of NDE bearings,
  • changing DE bearings,
  • changing NDE bearings,
  • replacing gaskets,
  • changing the sliding brushes,
  • tacho generator test,
  • test run,
  • RAL OEM painting,
  • Final report.