DD8 Severe Service
Severe service applies to vehicles that average below 6.5 miles per gallon or that operate under severe conditions. Examples of Severe Service are idle time over 40%, load factor over 55%, operation on extremely poor roads or under heavy dust accumulation; constant exposure to extreme hot, cold, salt-air, or other extreme climates; frequent short-distance travel; construction-site operation; or farm operation. Only one of these conditions is necessary to categorize an application as Severe service.
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DD8: Severe Service Maintenance Intervals GHG17 with ULSD Fuel GHG17 Using DFS 93K222(CK-4) or 93K223(FA-4) Approved Oils |
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| Lubricating Oil | Replace every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* | ||||
| Lubricating Oil Filter | Replace every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* | ||||
| Coolant - Standard Life |
Inspect every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* Replace every 300,000 miles (480,000 km) (3,000 hrs) (24 months)* |
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| Coolant - Extended Life |
Inspect every 90,000 miles (145,000 km) (1,500 hrs) (12 months)* Replace every 600,000 miles (965,000 km) (6,000 hrs) (48 months)* |
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| Fuel Filters (frame and engine) | Replace every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* | ||||
| Engine Steam Clean | At every oil change to remove particle buildup, grime, salt and normal fluid seepage, see How to Clean an Engine | ||||
| Valve Lash Adjustment | Adjust every 90,000 miles (145,000 km) (3,000 hrs) (24 months)* | ||||
| Belts |
Inspect every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* Replace every 135,000 miles (217,000 km) (4,500 hrs) (36 months)* |
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| Air System | Inspect every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* | ||||
| Air Cleaner | Refer to vehicle maintenance procedures | ||||
| Exhaust System | Inspect every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* | ||||
| Aftertreatment Devices | Inspect external hardware and connections every 6 months or at oil change intervals.* | ||||
| Diesel Particulate Filter** |
A Check Engine Indicator or mileage/time intervals indicate when ash cleaning is required. Use DETROIT Diesel Corporation’s authorized DPF cleaning procedure. Failure to follow this procedure could result in engine and/or aftertreatment damage, causing degraded vehicle performance including excess fuel consumption and decreased engine life. Normal DPF ash clean interval is every 150,000 miles (241,000 km) (5,000 hrs)* |
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| DEF Pump Filter | Replace every 500,000 miles (805,000 km) (10,000 hrs) (3 years)* | ||||
| Air Compressor | Inspect every 45,000 miles (72,000 km) (1,500 hrs) (12 months)* | ||||
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*Whichever comes first. Note: Reaching the Davco change line supersedes these intervals. **Detroit highly recommends exchanging the DPF with a Detroit™ genuine DPF to ensure maximum life. |
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