Severe Duty/Vocational - 15,000 mi / 24,000 km / 400 hrs / 6 mo
20
Air system and compressor
• Refer to Air Compressor on page 93 for maintenance instructions.
• Refer to Engine Air Filters on page 93 for maintenance instructions.
Charge Air System
• Refer to Charge Air Piping on page 93 for maintenance instructions.
• Refer to Charge Air Cooler on page 93 for maintenance instructions.
Charging/Cranking System
• Refer to Electrical Harness / Cables on page 95 for maintenance instructions.
Cooling System
• Refer to Coolant/Antifreeze Condition on page 83 for maintenance instructions.
Severe Duty/Vocational - 30,000 mi /
48,000 km / 800 hrs / 12 mo (1 yr)
Severe Duty/Vocational - 30,000 mi / 48,000 km / 800 hrs / 12 mo (1 yr)
21
Charging / Cranking System
• Refer to Batteries, Cables, and Connections on page 96 for maintenance instructions.
20
Ensure that all maintenance intervals leading up to this point are repeated during this interval prior to the completion of
those listed here.
21
Ensure that all maintenance intervals leading up to this point are repeated during this interval prior to the completion of
those listed here.
ENGINE MAINTENANCE - Severe Duty/Vocational
Y53-1166-1M1 (10/2020) 45
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