GHG17 DD Medium Duty Operators Manual Excessive fan run time due to higher Charge Air Cooler (CAC) outlet temperatures resulting from low air flow through the CAC Increased fuel consumption Failure of the DEF system heaters to turn on when needed due to incorrect temperature calculations resulting in fault codes, poor performance of the Aftertreatment System, and power reduction Failure of critical emission equipment that will result in vehicle speed inducement to a maximum of 5 mph Use of a winter front should be avoided as this has been shown to cause false fault codes with the engine and aftertreatment system.
This has also been linked to specific component failures that will cause vehicle downtime and lost productivity. There are two specific situations where a winter front may be temporarily needed: To improve cab heating while idling under extreme cold ambient temperature When the ambient temperature remains below -30°C (-22°F) and the engine is unable to maintain running coolant temperature of 80°C (175°F) during normal over-the-road operation If either of the above situations is encountered, then a winter front may be temporarily used. A minimum of 25% of the grill must be open in sectioned stripes that run perpendicular to the charge air cooler tube flow direction.
This assures even cooling across each tube and reduces header-to-tube stress and possible failure. All information subject to change without notice. 31 DDC-SVC-MAN-0192 Copyright © 2017 DETROIT DIESEL CORPORATION