PREVENTIVE MAINTENANCE SCHEDULE 5 5-28 Y53-6077-1B1 (03/17) PREVENTIVE MAINTENANCE (PM) INTERVALS SYSTEM COMPONENT MAINTENANCE TASK Recommended PM Interval I A B C D E Cooling Hoses Check the radiator and heater hoses for leaks. X X Extended Life Coolant (ELC) Check the freeze point (shown on page 5-83). X Check for contamination using test strips (shown on page 5-82). X Replace blank water filter if applicable. X Perform lab analysis (shown on page 5-82). If lab analysis shows coolant is unsuitable for continued use: Flush, drain, and refill (shown on page 5-82). Add ELC Extender (shown on page 5-82). X Flush, drain, and refill with new coolant (shown on page 5-82).
X Fan clutch Check for air leaks. (shown on page 5-106). Check the fan drive bearings (turn the sheave in both directions to check for worn hub bearings). X X Solenoid valve Check the fan drive for proper engagement and disengagement. X X