What does DEF mean? DEF stands for diesel exhaust fluid which is a non-hazardous solution. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water.

Click here for helpful hints on how to properly fill the DEF tank on your equipment.

Remember: DO NOT fill the DEF tank with diesel fuel. If this mistake happens, this fuel contaminates the entire system and will have to be completely removed and replaced immediately. The repair costs roughly $10,000 – 12,000.

Have you never seen DEF equipment before? Do you have questions?
Ask your foreman, regional fleet manager or the Fleet Department. They would be happy to answer any questions and save the cost on this repair!