Validity
This Executive Order approved the specified parts on on May 14, 2003.
As of Monday, October 7th, 2024 this Executive Order has not been overturned or superceeded.
This Executive Order approved the specified parts on on May 14, 2003.
As of Monday, October 7th, 2024 this Executive Order has not been overturned or superceeded.
Models | Modification |
---|---|
1991-2002 Caterpillar 3208, 3116, 3126, 3306, 3406, C10, C12, C15, C16 (all hp). This exemption applies to 1991-2002 4-stroke heavy-duty diesel engines originally certified to meet a particulate matter emission standard of 0.10 g/bhp-hr or lower. | This exemption is only valid provided the engines meet the following operating conditions: (1) the engine exhaust temperature is greater than or equal to 260 degrees Celsius for 40-50 percent of the typical duty cycle, (2) the NOx to PM ratio is at least 8, and (3) the engine is operated using diesel with a maximum sulfur content of 50 ppmw. |