PREVENTIVE MAINTENANCE SCHEDULE 5 (03/17) Y53-6077-1B1 5-21 PREVENTIVE MAINTENANCE (PM) INTERVALS SYSTEM COMPONENT MAINTENANCE TASK Recommended PM Interval I A B C D E Rear Suspension U-bolts Check the torque. Tighten to specified torque value as required (shown on page 5-133). X X Frame and crossmember bolts Check the torque. Tighten to specified torque value as required (shown on page 5-114). X Mounting brackets and fasteners Check the condition and the fastener torque. Tighten to the specified torque value as required (shown on page 5-114). X X