PREVENTIVE MAINTENANCE SCHEDULE 5 5-16 Y53-6077-1B1 (03/17) PREVENTIVE MAINTENANCE (PM) INTERVALS SYSTEM COMPONENT MAINTENANCE TASK Recommended PM Interval I A B C D E Front Suspension Front Spring Inspect for cracked leaves, worn bushings, and excessive corrosion. X Spring Pins and Shackles Inspect for worn parts and excessive joint clearance. Shim or replace as required. X Shock Absorbers Inspect for leaking, body damage, and damaged or worn bushings. Replace as required. Check the shock mounting stud torque. X Spring Pins Lubricate with approved grease. X Check for proper function. X U-bolts (ON HIGHWAY) Check the general condition and the tightness of the nuts.
Tighten the nuts to the specified torque value as required (shown on page 5-118). X X U-bolts (OFF HIGHWAY) Check the general condition and the tightness of the nuts. Tighten the U-bolts after the first day or two of operation. Then tighten the nuts to the specified torque value as required (shown on page 5-118). X