Maintenance Guidelines
Severe Duty
Vocational**
Normal Duty
Line Haul
Fuel Consumption
Miles per Gallon
Kilometers per Liter
Less than
6 MPG
Less than 2.6 km/L
6 MPG or greater
2.6 km/L or greater
Gross Vehicle Weight
More than 80,000 lb
More than 36,300 kg
80,000 lb or less
36,300 kg or less
Oil Drain and Filter Interval 25,000 miles/40,000 km
800 hours or 12 months
Less than 20% idle time:
60,000 miles/96,000 km
1200 hours or 12 months
More than
20% idle time:
40,000 miles/64,000 km
1200 hours or 12 months
**Vocational
vehicle applications include: Agriculture, Concrete Mixers, Construction, Crane, Dumps, Emergency/Fire, Heavy Equipment, Loggers,
Mining, Oil Field, Refuse, Pick-up & Delivery, Snowplows, and Wrecker
5
Maintenance Schedule
General Information
Perform maintenance
at whichever
interval occurs rst. At each scheduled
maintenance interval, perform all
previous maintenance checks that are
due for scheduled maintenance.
NOTE
NOTE
This maintenance
schedule is for
The crankcase
ventilation is good for
a Normal Duty Cycle engine op-
the life of the engine.
eration. Severe
Duty / Vocational
applications will
need to adjust
mileage, kilometer, hour, or time in-
terval based on the Oil Drain Interval
Guidelines listed
above.
5-4
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