3116 and 3126 HEUI Truck Engines Air Compressor Maintenance

The function of the air compressor pressure relief valve is to bypass air when there is a malfunction in the air compressor system. The pressure relief valve releases air pressure at 1723 kPa (250 psi). It is very important that all personnel stand clear of the pressure relief valve when compressed air is released. All personnel should also stand clear of the general vicinity of the air compressor when the engine is operating and the hood is raised.

Air Compressor Air Filter – Clean/Replace

One of the single most important aspects of air compressor preventative maintenance is the induction of clean air. The type of maintenance that is required for the air compressor and the maintenance interval depends upon the type of air induction system that is used. More frequent maintenance will be required for operation in dusty or dirty environments.

Refer to the Service Manual for the type of air compressor that is installed on your engine. Follow the maintenance recommendations that are provided by the OEM of the air compressor.

Inspect the Air Compressor

Refer to the Service Manual for the type of air compressor that is installed on your engine. Visually check for fluid leaks and listen for air leaks. Inspect the air compressor as instructed by the literature provided by the OEM of the air compressor. For more information on how to check the air compressor, refer to the Service Manual. Consult your Caterpillar dealer for assistance.

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