MAINTENANCE - PACCAR 20k Front Axle Lubrication Intervals 1 PACCAR 20k Front Axle Lubrication Intervals Steer Axles Steer Axle Wheel Ends 6 Y53-1280-1A1 (05/08/2018) Type of Lube System Lubricant SAE Change Interval for Line Haul Change Interval for Vocational Kingpin Joint Grease / Tie Rod Ends Heavy-Duty Multipurpose Lithium Based #1 Grade or #2 Grade 25,000 miles (40,000 km) or 6 months Every 50 hours Type of Lube System Lubricant SAE Change Interval for Line Haul Change Interval for Vocational Steer Axle Oil Bath LMS Synthetic SAE 75W-90 500,000 miles (800,000 km) or 5 years 120,000 miles (193,000 km) or 2 years Steer Axle Oil Bath (Adjusted) Synthetic SAE 75W-140, SAE 50 120,000 miles (193,000 km) or 1 year 60,000 miles (95,000 km) or 6 months