C8.3 Commercial Marine and Ind [...] Maintenance Schedule Section 2 - Maintenance Guidelines Page 2-3 Charge-Air Piping - Check 4 Air Cleaner Restriction - Check 4 Air Compressor - Check 4 Radiator Pressure Cap - Check Maintenance Procedures at 500 Hours, or 6 Months 2, 3, 4 Coolant Filter - Change Supplemental Coolant Additive (SCA) and Antifreeze Concentration - Check 2, 3 Air Compressor Discharge Lines - Check 4 Maintenance Procedures at 1000 Hours, or 1 Year 4 Overhead Set - Adjust Cooling Fan Belt Tensioner - Check Air Cleaner Assembly (Engine-Mounted) - Change 4 Maintenance Procedures at 2000 Hours, or 2 Years 2, 3, 4, 5 Vibration Damper, Rubber - Inspect for Reuse Vibration Damper, Viscous - Inspect for Reuse Cooling System - Flush 2, 3, 5 Air Compressor Discharge Lines - Check 4