Cody Christopher discusses the essentials of adding DEF to your Tier 4 machines to ensure continued peak performance

During the past decade, diesel exhaust fluid (DEF) became increasingly prominent in the construction industry. Its function is to reduce the nitrogen oxides in diesel exhaust emissions.

“Less harmful emissions are better for the environment,” stated Cody Christopher, Regional Product Support Sales Manager at Kirby-Smith Machinery Inc.’s (KSM) Abilene, Texas, branch. “It’s a consumable, so it’s not changed. You simply add it just as you would diesel fuel, and like fuel, there is a gauge in the machine that lets you know when it’s low. Typically, the tank is located on the right-hand side of a machine and is distinguishable by a blue cap that signifies DEF.”

Christopher emphasized that cleanliness is essential in the filling process, which is simple.

“Take a wet rag, or a bottle of water and a rag, and clean off the cap and the area around it before you remove the cap, and try to get any contaminants away,” said Christopher. “Once you get contamination in the tank, it can be a costly repair. DEF usually comes in a jug with a spout inside. After removing the lid, screw the spout on and carefully pour directly into the tank. Replace the cap.”

Store properly

Temperature and sunlight can affect the quality of DEF, so it should be stored indoors in a climate-controlled environment, ideally between 23 degrees Fahrenheit and 85 degrees Fahrenheit.

“It’s not good to have containers in the bed of a pickup,” stated Christopher. “Where and how it’s stored affects shelf life. You should never use DEF fluid that has exceeded that or if there is a question of its age and quality. It’s not worth the risk.”

Christopher added that each KSM location stocks DEF, so customers can stop in and pick some up.

“We typically have plenty on hand,” he noted. “If a customer wants any information about DEF and how it affects their machine, or about other parts and service-related items, they can always give their PSSR (Product Support Sales Representative) a call. We’re here to be a resource for their needs.”