DEF_Specifications_for_Cummins_SCR_Systems.pdf

This document is a Cummins Service Bulletin detailing Diesel Exhaust Fluid (DEF) Specifications for Selective Catalytic Reduction (SCR) Systems, issued on 27-AUG-2012 with the service bulletin number 4021566. The document provides comprehensive guidelines for handling, storing, testing, and using DEF in Cummins engines, with a focus on maintaining fluid quality and preventing system damage. Key specifications include a required urea content of 32.5 percent ± 1.5 percent by weight, compliance with International Standard ISO 22241-1, and recommendation of DEF certified by the American Petroleum Institute (API) for engines operating in the United States and Canada.

The bulletin emphasizes critical handling practices, including using only approved containers made of polyethylene, polypropylene, or stainless steel, storing DEF at temperatures between -5°C to 25°C, and maintaining an 18-month minimum shelf life under proper conditions. Important warnings include never adding water or unauthorized fluids to the DEF tank, avoiding chemicals/additives to prevent freezing, and using proper cleaning practices to prevent contamination. The document provides detailed first aid instructions, disposal guidelines, and testing procedures, with a Cummins DEF refractometer recommended for concentration verification. Materials that may corrode when in contact with DEF are specifically listed, including carbon steel, zinc-coated carbon steel, nonferrous metals, and certain alloys.