BIT 2690372 - Caterpillar

To prevent possible personal injury, make sure all the pressure in the system has been released before any air lines are disconnected.
2. Open the drain valve on the air tank. 3. Disconnect line (1). Cap or plug immediately.4. Disconnect line (2) (not shown). Cap or plug immediately.5. Disconnect two hoses (3). Cap or plug immediately. 6. Remove five bolts (4).7. Remove air compressor (5) and gasket (6) (not shown). Check gasket for wear or damage. Replace if necessary. When installing gasket, make sure all gasket surfaces are clean and free of dirt. For installation of the air compressor, reverse the removal steps.8. Fill the radiator with coolant to the correct level. See the Operation & Maintenance Manual.