PREVENTIVE MAINTENANCE SCHEDULE 5 5-38 Y53-6077-1B1 (03/17) PREVENTIVE MAINTENANCE (PM) INTERVALS SYSTEM COMPONENT MAINTENANCE TASK Recommended PM Interval I A B C D E Aftertreat- ment Sys- tem System Check for leaks and proper support (shown on page 5-123). X Diesel particulate filter Clean filter. Refer to the Engine Maintenance Manual. Diesel exhaust fluid tank Inspect the tank, straps, brackets, hoses and fittings for abrasion damage, leaks, tightness and fully engaged connectors. X Diesel exhaust fluid supply module Replace filter. Refer to the Engine Maintenance Manual.