INSTALLATION GP-HARDWARE 7X9604 - Caterpillar

Extended Idle at Cold Ambient Temperature
The engine may automatically change speeds when the engine is idling in cold ambient temperatures (typically less than 0° C (32° F) for extended periods. The purpose of the automatic speed change is threefold: to maintain the desired operation of the NOx reduction system, to maintain the desired operation of the regeneration system and to keep the engine coolant warm. The engine speed may rise to 1600 rpm for as long as 20 minutes.The high exhaust system temperature lamp may illuminate during extended idling conditions. This illumination signals that a diesel particulate filter (DPF) regeneration is in progress. Regenerations during cold ambient extended idling may only last up to 10 minutes.