A bus compressor is a device that is used to compress the air that is used to operate the brakes on a bus. The compressor is located in the engine compartment of the bus and is driven by the engine. The compressor takes in air from the atmosphere and compresses it to a higher pressure. The compressed air is then stored in a tank on the bus. When the brakes are applied, the compressed air is released and goes into the brake system. The air pressure in the brake system activates the brakes and brings the bus to a stop.
One of the most common reasons bus compressors fail is due to a build-up of dirt and debris in the unit. Over time, this can cause the compressor to overheat and eventually die. In some cases, the compressor may also become frozen due to the accumulation of dirt and debris, preventing it from properly functioning. In addition, bus compressors can also fail due to a loss of lubrication, which can cause the unit to seize up and die.