Maintenance of Compressed Air Motor for Peak Performance

by Ben Parker · March 23, 2016

Just like most industrial tools, your air compressor also requires a proper periodic maintenance to operate at peak performance. Irregular and incompetent maintenance can significantly diminish the efficiency of the air compressor, increase energy consumption and increase air leakage. Although these are all minor problems (and can usually be taken care of with cleaning or adjustments), inadequate maintenance of compressor drive or motor, can cause an equipment fail before expected lifetime.

In case of motor fail, you want to replace the part with the original equipment, be it a main drive or fan motor. Remember, every compressed air motor is specifically designed for use with specific brand, meaning not every motor replacement will work on your compressor in regards to mounting arrangements, frame size and bearing configurations. Therefore make sure you know the make and model number and have your manual, in order to get the correct replacement compressed air motor designed to fit your equipment.

Air compressor motor helps keep your operation smooth and without any downtime. Depending on the type of compressor, be it portable or stationary, commercial-duty motors can meet the needs of high-loads applications. If maintained periodically that is. The two important elements of proper motor protection are cleaning and lubrication.

Motor efficiency is directly related to heat dissipation. To ensure heat dissipation rate is not less than generated heat, regularly clean the air passages to ensure they are free of any obstruction. Also, clean cooling fins of any debris to minimise the chances of increased winding resistance and motor temperature.

Compressed air motors should be regularly lubricated, usually every 6 to 18 months. Some may even require lubrication every 2 months; it all depends on the speed of the motor and monthly hours of operation. Before you add new grease, remove the drain plug and clean the fitting. Refer to manufacturer’s manual regarding the lubrication level– too much or too little grease can lead to increased energy consumption and cause premature motor failure. Also, use the lubricant that is of proper viscosity and has the right additives.

To keep your compressed air system working properly you need to establish regular preventive maintenance program and perform it on schedule. It is best to appoint one person to keep track and document every performed maintenance. Aside from cleaning and lubricating air compressor motor, preventive maintenance should also include:

checking and changing filters (clogged filters lead to increased energy consumption due to increased pressure drop);
checking belts (belt wear can cause energy waste and excessive bearing wear).