C7 Engines for Combat and Tactical Vehicles Caterpillar

The level of maintenance is crucial to the service life of the engine. Other major factors that affect service life are operating speed and loads.

Reduce the maintenance intervals for engines that operate under conditions that are severe.

• Frequent operation with more than 22700 kg (50000 lb) of gross vehicle weight

• Frequent low speed operation (less than 20 Miles per Hour)

• Use of API CF-4 oil

• Use of fuel with more than 0.05% sulfur

• No water separator

• Frequent operation in dusty conditions or off-highway operation

• High load factor operation (less than 6 miles per gallon or off-highway operation)

• Frequent high altitude operation above 1525 m (5000 ft)

• 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 three 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".