BEARING (inner) 8P6652 - Caterpillar

Operation and maintenance practices affect the service life of the components when the engine is operated in severe service applications.The following factors are crucial to the service life of the engine:
The level of maintenance
Operating speeds
Operating loads
Gross vehicle weightsReduce the maintenance intervals for engines that operate in severe service applications. An application is a severe service application if any of the following conditions apply:
The weight is higher than the weight that is listed in the table.
The average mpg is less than the mpg listed in the table.
The average kilometer per liter is less than the kilometer per liter listed in the table.
Table 1
Severe Service Applications (1)(2)
Engine Model Gross Vehicle Weight Average Miles per Gallon Average Kilometer per Liter Average liters per 100 km
C7 On-highway Engine 22680 kg (50000 lb) 10 4.3 23.5
C9 On-highway Engine 27215 kg (60000 lb) 8 3.4 29.4
C9 On-highway Engine (Urban transit bus application)(3) 27215 kg (60000 lb) 4 1.7 58.8
C13 On-highway Engine 36287 kg (80000 lb) 6 2.6 39.2
C15 On-highway Engine 36287 kg (80000 lb) 5 2.1 47
(1) An engine is operating in a severe service application when the gross operating weight is higher than the gross operating weight in this table.
(2) An engine is operating in a severe service application when the fuel consumption is greater than the fuel consumption in this table.
(3) An engine for an urban transit bus generally operates in severe service conditions..
Frequent low speed operation (less than 20 Miles per Hour)
Use of fuel with more than 15 ppm sulfur
No water separator
Frequent operation in dusty conditions or off-highway operation
Off-highway operation
Frequent high altitude operation above 1525 m (5000 ft)
Extreme ambient temperature conditions that may cause the lubricating properties of the fuel to diminish
Frequent plugging of the fuel filter
Extended maintenance intervals of the fuel system
Inadequate maintenance of fuel storage tanks (excessive water, sediment, microorganism growth, etc.)
Extending maintenance beyond the recommended maintenance intervals
Use of fuels, coolants or lubricants that are not specified by Caterpillar in Special Publication, SEBU6385, "Caterpillar On-highway Diesel Truck Engine Fluids Recommendations"
Frequent operation at low idle (more than 20%)
Frequent cold starts at temperatures below −18 °C (0 °F)
Frequent dry starting (starting after more than 3 days of shutdown)
Frequent hot shutdowns (minimum five minute cool down periods after high load factor operation)
If the engine is stored over 3 months, see Special Instruction, SEHS9031, "Storage Procedure for Caterpillar Products".For additional information about severe service applications, consult your Caterpillar dealer.