Nov 07, 2019 · Merritt said Cummins diesel engine platforms are expanding for 2020, providing customers with dependable, efficient solutions for line-haul, regional-haul, heavy-haul, vocational and specialty applications. 12 Cummins X15 engine and engine cooling TSB (Bulletin ATC2405) Bulletin Date: Feb. Common rail test bench EPS916 test Cummins X15. Cummins engines will have the engine serial number on the dataplate. The dataplate on an engine can be a great reference because it will often also include additional information, such as CPL, horsepower, and RPM rating. However, the dataplate can be hard to find, as it will be in different locations based on the model of the engine.