Search Results

Engine cooling fan systems for off-highway machinery require a significant amount of horsepower and contribute to the overall noise level of the machine. Reducing fan speed in times of low cooling demand provides a means to reduce vehicle noise levels and divert engine horsepower from the fan to do productive work. The fan must, however, continue to provide adequate airflow when demanded by the cooling system. Electronic fan controls that modulate fan speed to meet changing cooling system requirements provide the above advantages.

Field testing of an extended life coolant technology in Class 8 trucks, equipped with Caterpillar C-12 engines revealed excellent coolant life with negligible inhibitor depletion to 400,000 miles with no refortification and no coolant top-off. In separate evaluations in Caterpillar 3406E equipped trucks, extended corrosion protection and component durability were established out to 700,000 miles, without the need for refortification other than top-off.