PREVENTIVE MAINTENANCE SCHEDULE 5 5-20 Y53-6077-1B1 (03/17) PREVENTIVE MAINTENANCE (PM) INTERVALS SYSTEM COMPONENT MAINTENANCE TASK Recommended PM Interval I A B C D E Drive Axle (SISU) Axle Housing Change the oil in the differential carrier and the hubs, and clean the magnetic oil drain plugs. X X Check the wheel bearing hubs and adjust if necessary. X X Visually inspect for damage or leaks. X X Check the oil level in the differential carrier and hubs. X Breather Check the breather for proper operation. X Lube Filter Clean the suction filter for the optional pressure lubrication system. X S-cam brakes Overhaul the brakes; degrease all moving parts; check the bushings and seals for wear. X