ABB DC Machines DMP 112...180

- Clean the motor inside using a vacuum cleaner in combination with clean, dry pressure air or by wiping off the contamination.

- Measure the insulation resistance of the windings using a 500 V megger (both before and after cleaning).

- Inspect all connections including the brush flexibles.

- Lubricate or wash out bearings and repack with grease.;

- Inspect brush for wear and freedom of movement.

- Inspect the condition of brush-holders and the commutator.

- Check for vibrations. Measure near the outer bearing cover. Vibrations are also checked at the brush using an insulated stick.

- Check fans regarding bearing vibrations.

- Check the function of thermostat regulators for coolers.

- If necessary clean away oil or grease which eventually has entered into the motor.

- Exchange main air filters as well as air leakage filter in coolers.

- After 100 operating hours the commutator and the brushes should be inspected while the machine is at rest. The surface of the commutator must show a homogenous film (patina). The brush contact surface must be homogenous without patchy discoloring. If the results of the inspection are not satisfactory ABB Industrie should be consulted.;

- Irrespective of the duty time the grease must be replaced at least every fifth year.;