12.1 Scheduled Intervals
All service intervals and maintenance operations are based on the parts and accessories expressly approved for your engine.
The scope and frequency of maintenance work are determined by the engine's operating conditions: severe duty, short haul, or long haul.
Evidence of regular maintenance is essential if a warranty claim has to be submitted.
If optional equipment is installed, be sure to comply with the maintenance requirements for these extra items.
Important: If the engine is stored for more than 18 months, the oil must be changed and the lubrication system must be primed before the engine can be brought into service. See MBE 4000 Service Manual (6SE420).
12.1.1 Maintenance Schedule Types
There are three types of maintenance schedule:
Severe Service
Short Haul
Long Haul
To determine which schedule to use, find the distance traveled by the vehicle in a year, regardless of vehicle type.
12.1.1.1 Severe Service
Applies to vehicles that annually travel up to 10,000 miles (16,000 kilometers) or that operate under severe conditions. Examples of Severe Service usage include: operation on extremely poor roads or where there is heavy dust accumulation; constant exposure to extreme hot, cold, salt-air, or other extreme climates; frequent short-distance travel; construction-site operation; city operation (fire truck, garbage truck), or farm operation.
12.1.1.2 Short-Haul
Applies to vehicles that annually travel up to 15,000 miles (24,000 kilometers) and operate under normal conditions. Examples of Short-Haul usage are: operation primarily in cities and densely populated areas; local transport with infrequent freeway travel; or high percentage of stop-and-go travel.
12.1.1.3 Long-Haul
Long Haul (over-the-road transport) is for vehicles that annually travel more than 30,000 miles (48,000 kilometers), with minimal city or stop-and-go operation. Examples of Long-Haul usage are: regional delivery that is mostly freeway miles; interstate transport; or any road operation with high annual mileage.
12.1.1.4 Maintenance Intervals
The three tables show which maintenance operation must be performed at the actual distances (in miles or kilometers) for each maintenance operation. The schedule of actual distances is based on the intervals given in the Maintenance Tables
The three maintenance tables are: referred to in section "Maintenance Tables" “ .”
Maintenance Interval Table, Severe Service ( listed in Table "Maintenance Intervals (Severe Service)" )
Maintenance Interval Table, Short Haul ( listed in Table "Maintenance Intervals (Short Haul)" )
Maintenance Interval Table, Long Haul ( listed in Table "Maintenance Intervals (Long Haul)" )
12.1.2 Schedule Use
Before placing your new vehicle in service, determine the correct maintenance intervals that apply to your intended use of the vehicle. Refer to "Maintenance Tables" “ ” to determine the distance interval at which each maintenance operation must be performed to comply with your vehicle's schedule.
When the vehicle reaches the actual distance given for an interval, refer to "Maintenance Tables" “ ”.
When maintenance is required for hours of engine operation for severe applications refer to "Maintenance Tables" “ ”. Listed in Table "Maintenance Intervals by Engine Hours" provides an engine hours conversion for applications that may require service intervals based on hours and not mileage. The intervals are based on a collaboration of field and fleet data. For a more accurate analyst of when fluids should be changed, such as engine oil, refer to publication Engine Requirements – Lubricating Oil, Fuel and Filters , (7SE270), available from authorized Detroit Diesel distributors.
Complete each maintenance operation at the required interval.