Section 13.3 Maintenance of Engines

Section 13.3
Maintenance of Engines

Service intervals are based upon average operating conditions. Where dusty, frequent start and stop or heavily laden operations are encountered, more frequent servicing will be required.‪

Section 13.3.1
6,000 Miles (9,650 km), 225 Hours or 3 Months Interval Maintenance (Transient Bus)

Every 6,000 miles (9,650 km), 225 hours or 3 months (transient bus), the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Change engine oil and filter. If fuel contains more than 0.05% sulfur, reduce oil change intervals. Refer to "13.4.8 Engine Oil and Oil Filter" .

  Note: The oil change interval on the transient bus is every 6,000 miles. The fuel filter replacement interval is every 12,000 miles (or every other oil change).

Section 13.3.2
12,000 Miles (19,300 km), 450 Hours or 6 Months Interval Maintenance

Every 12,000 miles (19,300 km), 450 hours or 6 months, the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Change engine oil and filter. If fuel contains more than 0.05% sulfur, reduce oil change intervals. Refer to "13.4.8 Engine Oil and Oil Filter" .
• Check coolant SCA concentration. Refer to "13.4.9 Coolant" .
• Inspect air intake piping and clamps. Refer to "13.4.10 Air Intake Piping" .

Section 13.3.3
24,000 Miles (38,600 km), 900 Hours or 12 Months Interval Maintenance

Every 24,000 miles (38,600 km), 900 hours or 12 months, the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Change engine oil and filter. If fuel contains more than 0.05% sulfur, reduce oil change intervals. Refer to "13.4.8 Engine Oil and Oil Filter" .
• Check coolant SCA concentration. Refer to "13.4.9 Coolant" .
• Inspect air intake piping and clamps. Refer to "13.4.10 Air Intake Piping" .
• Measure air intake restriction. Refer to "13.4.10 Air Intake Piping" .
• Change fuel filters according to transfer pump minimum specifications. Refer to "13.4.12 Fuel Filter and Strainer Assembly" .
• Change coolant filter. Refer to "13.4.13 Change Coolant Filter" .

Section 13.3.4
100,000 Miles (161,000 km), 3800 Hours or 24 Months Interval Maintenance

Every 100,000 miles (161,000 km), 3800 hours or 24 months, the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Change engine oil and filter. If fuel contains more than 0.05% sulfur, reduce oil change intervals. Refer to "13.4.8 Engine Oil and Oil Filter" .
• Check coolant SCA concentration. Refer to "13.4.9 Coolant" .
• Inspect air intake piping and clamps. Refer to "13.4.10 Air Intake Piping" .
• Measure air intake restriction. Refer to "13.4.10 Air Intake Piping" .
• Change fuel filters according to transfer pump minimum specifications. Refer to "13.4.12 Fuel Filter and Strainer Assembly" .
• Change coolant filter. Refer to "13.4.13 Change Coolant Filter" .
• Service cooling system for the 7.6L engine. Refer to cooling system specifications. Refer to "13.4.13 Change Coolant Filter" .
• Inspect vibration damper. Refer to "13.4.15 Vibration Damper" .
• Pressurize induction system. Refer to "13.4.16 Induction System" .

Section 13.3.5
120,000 Miles (193,100 km) or 5000 Hours Interval Maintenance

Every 120,000 miles (193,100 km), or 5000 hours, the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Adjust valve lash. Refer to "13.4.17 Valve Lash" .

Section 13.3.6
180,000-200,000 Miles (290,000-322,000 km), or 6,700 to 7,500 Hours Interval Maintenance

Every 180,000 to 200,000 miles (299,000 to 322,000 km), or 6,700 to 7,500 hours, the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Service cooling system for the 8.7L engine. Refer to cooling system specifications. Refer to "13.4.13 Change Coolant Filter" .
• Measure crankcase pressure. Refer to "13.4.18 Crankcase Pressure" .
• Inspect turbocharger. Refer to "13.4.19 Turbocharger" .

Section 13.3.7
Annual Interval Maintenance

Annually, the following components must be inspected, serviced, corrected or replaced as necessary.‪

• Inspect electrical system. Refer to "13.4.20 Electrical System" .