PREVENTIVE MAINTENANCE SCHEDULE 5 (03/17) Y53-6077-1B1 5-39 PREVENTIVE MAINTENANCE (PM) INTERVALS SYSTEM COMPONENT MAINTENANCE TASK Recommended PM Interval I A B C D E Air Air compressor governor Replace air strainer. X Air lines Check condition and routing to prevent chafing. X System Lubricate (shown on page 5-60). X Inline filters Replace elements or clean with solvent. X Air dryer Perform the checks listed (shown on page 5-57). X Air dryer (ON HIGHWAY) Overhaul. 360,000 miles/576,000 km Air dryer (OFF HIGHWAY) Overhaul. X