General Information 00 Service Schedule Table:
00–02 Service Schedule Maintenance Interval Operation Maintenance Interval Frequency Miles km Hours Schedule I * (Severe Service) vehicles that annually travel less than 6000 miles (10 000 km) Initial Maintenance (IM) first 1000 1600 50 Maintenance 1 (M1) every 1000 1600 50 Maintenance 2 (M2) every 5000 8000 500 Maintenance 3 (M3) every 15,000 24 000 1500 Schedule II (Short-Haul Transport) vehicles that annually travel less than 60,000 miles (100 000 km) Initial Maintenance (IM) first 10,000 16 000 Maintenance 1 (M1) every 10,000 16 000 Maintenance 2 (M2) every 50,000 80 000 Maintenance 3 (M3) every 150,000 240 000 Schedule III (Long-Haul Transport) vehicles that annually travel over 60,000 miles (100 000 km) Initial Maintenance (IM) first 25,000 40 000 Maintenance 1 (M1) every 25,000 40 000 Maintenance 2 (M2) every 100,000 161 000 Maintenance 3 (M3) every 300,000 483 000 Schedule IV (Long-Haul Transport for Optimized Vehicle Configuration) vehicles that annually travel over 60,000 miles (100 000 km) Initial Maintenance (IM) first 25,000 40 000 Maintenance 1 (M1) every 25,000 40 000 Maintenance 2 (M2) every 100,000 161 000 Maintenance 3 (M3) every 300,000 483 000 * For Schedule I (severe service) vehicles equipped with an hourmeter, use maintenance intervals based on hours of operation rather than distance traveled.
Use Schedule I (severe service) maintenance intervals for vehicles that operate under severe conditions, such as extremely poor roads, heavy dust accumu- lation, extreme climate, frequent short distance travel, construction-site operation, city operation (garbage truck), or farm operation. Table 1, Service Schedule Century Class Trucks Maintenance Manual, August 2017 00/2