Will DEF harm a CUT?

[Topzide]

DEF is used in the exhaust system to lower the Nox and particulate matter. Diesel pickups started around 2010, larger trucks maybe a bit sooner and a lot of tier IV tractors.

Basically it's a form of fertilizer for use in equipment. Some people purchase out of date DEF to put on their fields.

 

[CliffordK]

DEF = Diesel Exhaust Fluid.
It is a mixture of Urea (same stuff as in Urine), and water.

I think it goes into a catalytic converter to clean up the exhaust before it gets to the diesel particulate filter. If you don't have the clean emission stuff,then you don't need it.

I'm not convinced mounting the exhaust pipe so it blows diesel smoke into one's face was the wisest design choice.

 

[Deepdrop]

Some tractors and pretty much every truck sold in the last 10 years do require def. But it doesn’t mix with the fuel ever on any machine. There’s a separate tank with a blue cap for def. Mixing def with the fuel will result in the absolute best case scenario the engine stalling out on the water. Catastrophic damage to the fuel system is likely.

So it's not combusted? What does it actually do? I saw a video that showed a guy in a diesel pickup truck, talking about how the DEF level goes down over thousands of miles.

 

[Deepdrop]

Gotta admit, just seeing the pics as presented, those are a little confusing.

Also, why would you mix On Road with Off Road? Kinda defeats the purpose, no?

I used to buy off road and I had my fuel gel several times. I switched to on road and haven't had any gelling. Maybe it was coincidence, but it was such a pain dealing with the clogged fuel line that I'm willing to pay the extra anyway. I'm superstitious.

 

[4570Man]

So it's not combusted? What does it actually do? I saw a video that showed a guy in a diesel pickup truck, talking about how the DEF level goes down over thousands of miles.

I’ve only put def in my truck one time since I bought it. It doesn’t use much. The claimed rate is 2 percent of def compared to fuel. I don’t understand the exact process but it’s injected into the exhaust not the engine.

 

[Midniteoyl]

I used to buy off road and I had my fuel gel several times. I switched to on road and haven't had any gelling. Maybe it was coincidence, but it was such a pain dealing with the clogged fuel line that I'm willing to pay the extra anyway. I'm superstitious.

I meant more about the directions saying to pick Tractor Fuel, REFR or 'Both'.

But ya, lotta times the Off-Road stuff wont have anti-gel in it unless requested, which is hard to do at a pump.

 

[Midniteoyl]

So it's not combusted? What does it actually do? I saw a video that showed a guy in a diesel pickup truck, talking about how the DEF level goes down over thousands of miles.

Its injected into the exhaust where the heat breaks it down into Ammonia and Isocyanic Acid. The Isocyanic Acid reacts with the water and forms carbon dioxide and more ammonia. The Ammonia reacts with oxygen and the catalyst in the SCR to turn the NOx into Nitrogen and Water..

edit:

 

[shirleyujest]

I meant more about the directions saying to pick Tractor Fuel, REFR or 'Both'.

But ya, lotta times the Off-Road stuff wont have anti-gel in it unless requested, which is hard to do at a pump.

Depending on supplier. Any more the difference between Off-Road and On-Road is Dye and Excise Tax. Un-Dyed fuel works just fine Off-Road.

 

[Pinecrest]

THANK YOU ALL! For saving me from a very expensive mistake. I agree that it is awfully odd to have one hose and a tank that dispenses DEF or regular diesel. I'm going to drive back and take pictures, which I'll post. I'll also talk to the store personnel to see if they can explain it to me. Thank you all again. I will follow up in a day or two.

If it is dispensed through the same Hose > anyone buying there after
someone bought DEF is getting a lot of water in their Tank/can ... think between the Valve and hose end is about a Quart. I only buy alcohol
free gas from stations that have a dedicated pump. [when I was in college a roommate would go across the street when the gas station closed and drain all their hoses think he got a Gallon a night $$]

 

[Pinecrest]

I revisited the station. The manager was not there and nobody could give me any information. I'm attaching photos and a closeup of the instruction on the pump. There is only one hose, but it looks like the pump offers DEF and diesel. Two prices are on the pump as well. I tried pushing the DEF button and nothing happened, What do you all think?

I think after someone buys DIF there is a Lot of Water in that Hose....if you only filled a 2 Gallon you would be buying a Lot of water. This is Not right and should be Reported.

 

[Hoho223]

Is DEF the reason why diesel exhaust smells like chlorine? (That’s what I smell even though the main ingredient is urea.)

 

[4x4moses]

I filled my cans at a station that apparently pumps regular diesel by default, but if you push the button, it pumps DEF. I was confused by this and put about half a gallon in my 5 gallon can. It's hard to get a clear answer by searching online so I thought I'd ask on here. Do you think it's safe to use this can that is 90$ diesel and 10% DEF on my Kioti CS2510?
Thanks for any help/advice.

POUR IT OUT! DON'T PUT IT IN YOUR TRACTOR FUEL TANK.

 

[jigs_n_fixtures]

DEF reacts with Diesel and turns it into a crystalline gel, which is very hard to get dissolved. If it gels/crystalizes in the injectors you have to replace them, and the filters, and the tank, the lines, pumps, etc. Dave's Auto Channel has a couple of videos on his YouTube Channel.

 

[dodge man]

Yes it’s definitely a separate nozzle. Just to be clear the def is injected into the exhaust system and turns the exhaust into pixie dust and Channel number 5.

 

[mbalmer28]

I revisited the station. The manager was not there and nobody could give me any information. I'm attaching photos and a closeup of the instruction on the pump. There is only one hose, but it looks like the pump offers DEF and diesel. Two prices are on the pump as well. I tried pushing the DEF button and nothing happened, What do you all think?

If you look at the pump, there is another hose behind the door on the right. That is the DEF hose. If you were buying DEF, you would insert that hose into your DEF tank and then push the DEF button. I would venture to guess that the hose you used the first time was diesel only, as the hose on the left does not access the DEF. Your fuel is ok..

 

[aircommuter]

It says raise nozzle access door. Where is that in the photo?

 

[Too many Kubotas]

I'm still trying to understand how it's physically possible to get 0.5 gallons of DEF out of a diesel pump.

Either it's all DEF or it's all diesel. Reality dictates that it's all diesel...unless aliens somehow got involved in this normally simple task of filling up a can.

 

[boatmoter]

I filled my cans at a station that apparently pumps regular diesel by default, but if you push the button, it pumps DEF. I was confused by this and put about half a gallon in my 5 gallon can. It's hard to get a clear answer by searching online so I thought I'd ask on here. Do you think it's safe to use this can that is 90$ diesel and 10% DEF on my Kioti CS2510?
Thanks for any help/advice.

Diesel Exhaust Fluid (DEF) does not contain sulfur; it is primarily made up of 32.5% urea and 67.5% deionized water. DEF is used in diesel engines to reduce nitrogen oxide emissions, and it is separate from the diesel fuel itself, which must be ultra-low sulfur diesel (ULSD) to meet emissions standards. since it does not contain sulfur if running in a older machine I would add transmission fluid to the fuel about 1 quart per 5 Gallons, to keep the injection pump lubricated. the sulfur in Diesel fuel helps lube the injection pump

 

[kneedeep]

That pump is in the truck island, diesel is for filling off side fuel tank and no nozzle for DEF on that side.
The nozzle for DEF is probably on the other side with the card reader as most DEF tanks are on the driver side of trucks and tractors.
Unless you removed DEF hose and pumped it in, maybe it is all diesel??
If you aren’t sure what is in the can, don’t use for fuel. Fire starter, cleaning parts, wash dirty tractor, etc ……….

Suggestion for fellas buying road diesel,
Get a 30 gal barrel and manual pump and buy off road only. Last fuel I bought in a truckstop was going bad and plugged up all the fuel filters and line from tank. It was the last tank (100gal) for winter storage and heavily treated, went bad sitting in tank. Bad fuel was in the bottom and after filling everything was stored inside.I ended up dumping about 50 gallons of rotten fuel and all fuel in tractors.
Very expensive lesson on buying clean fuel. Station was a NEW Dodges with fuel 20 cents cheaper than other stations.

 

[CoyPatton]

I filled my cans at a station that apparently pumps regular diesel by default, but if you push the button, it pumps DEF. I was confused by this and put about half a gallon in my 5 gallon can. It's hard to get a clear answer by searching online so I thought I'd ask on here. Do you think it's safe to use this can that is 90$ diesel and 10% DEF on my Kioti CS2510?
Thanks for any help/advice.

Do not repeat DO NOT, put that mixture through any diesel engine. The damage and repairs will cost 1000’s of times the cost of 5gallons of diesel!
Mark that container as fuel for burning debris in some manner that will be recognized by all for years to come.
In my opinion, The bit of residue that might remain in the container is not worth the risk of damage to your engine.
But a new fuel container, and be extra cautious when getting fuel in future.
Final comment it is your contaminated fuel and engine, do with it what you wish. As for me, the potential damage is not worth the cost of 5 gallons of diesel!