DEF Is Related To Brake System

Hi, I'm a CDL student and I know some mechanical about trucks. I have a fellow student who said that the DEF prevent the air tanks form freezing, another said it's an additive. I Google for hours and I know both are incorrect but I didn't found anything that said in Black and White DEF is no related to brakes. I found and article that said it's not an additive. Can someone help me with knowledge. Thanks

Diesel Exhaust Fluid

Thanks for the picture and the article, but if you read my post I already know all that.

DEF is injected into the exhaust system of diesel engines to reduce Nitrogen Oxide emissions. It has nothing to do with the Air Brake System. Welcome to the Forum David. Stick around, you will learn a lot here. It will put you heads and tails ahead of your fellow students. Where are you attending Driving School?

I never heard anything about it being related to the brakes or keeping the air tanks from freezing. It's simply used to help the exhaust trucks usually let out be more "environmental friendly".

You would prevent your air lines or tanks from freezing simply by emptying the air tanks so it pushes out any water and oil that might be built up.

DEF is injected into the exhaust system of diesel engines to reduce Nitrogen Oxide emissions. It has nothing to do with the Air Brake System. Welcome to the Forum David. Stick around, you will learn a lot here. It will put you heads and tails ahead of your fellow students. Where are you attending Driving School?

Beat me to it with a better answer too.

Thanks for the respond, I been reading articles about DEF and I never found anything related to brakes, but I want it to all the expert on the field. I attend to Ferrari driving school in Astoria Queens, New York. Because it's a grant I need to complete class B to get class A, but it's ok, or maybe I find a company who help me get the class A and don't need to deal with some circumstances here.

Thanks for the picture and the article, but if you read my post I already know all that.

Wow! No need to get snappy David. If you "already know all of that", why did you post the question? This is a great group of people willing to answer any and all questions from newbies. We are not confrontational here.

Because it's a grant I need to complete class B to get class A, but it's ok, or maybe I find a company who help me get the class A and don't need to deal with some circumstances here.

You really should look into Company Sponsored Training. I have NEVER heard of needing a Class B in order to get an A. Sounds suspiciously like a money grab on the part of the School recieving the Grant Money. Search Company Sponsored Training on this site.

Paid CDL Training Programs is usually the recommended path here on TT, and it works for most people. But a lot of companies will hire people and train them for free while all you have to do is usually sign a contract saying you'll work for them for one year.

Some of them even pay you while you're getting your CDL or let you take out advances that'll be paid back over time.

I went with Schneider and although they don't have their own school anymore they paid for me to attend school to get my CDL before going to Schneider for a few more weeks of training. The only thing I bad to pay for was gas during school and food, they paid for the school and lodging costs.