how can ULSD gell at 105 degrees?

   / how can ULSD gell at 105 degrees? #1  

WTA

Platinum Member
Joined
Aug 31, 2007
Messages
750
How can this possibly happen? I keep a very clean 55 gallon steel drum in my air conditioned garage filled with the red stuff normally. I needed some on Sunday and couldn't get the red so I went and filled up my barrel at the gas station. A very busy station that has diesel shipments every day too.

I got home and a few hours later put it in my tractor and it promptly died. I found both filters completely clogged with jelly like fuel and every fuel hose leading from the pump and filters and to and from the tank was clogged solid.

Anyone know how this can possibly happen in 105 degree heat so I can take steps to prevent it again? That was a very expensive screw up on someones part. My tractor is stored outside for the time being but we haven't had any rain in a couple weeks and I've been running about a tank full through it every two days since then. I don't understand it.

I don't think it had anything to do with gradual buildup in the filters but it's possible.

I drained my tank and took fuel samples. The samples were clear and bright off the tank but when I got the tank drained and stuck my hand in there the bottom inch or so of the tank was thick rasberry jelly looking junk. Same as what I found in the filters. I've always been really careful about keeping the fuel clean and not allowing any water to get in it so I'm baffled here. I changed the filters at 50 then 100 hours. The 50 hour mark was called for in my owners manual, the next one wasn't scheduled till 600 hours but I did it anyway at 100. I have 200 hours on it now and it's got another fresh set on. I also drain them every day but I have never once seen any water come out.

I also put power service fuel conditioner at the recommended rate in every barrel full I buy. It's always in there.
 
   / how can ULSD gell at 105 degrees? #2  
Are ya sure it is gell. . or was it bio-matter..

I'd ahve saved some in a jar for a looksiie at what happened in direct sun... or if it continued to 'gel' if I added more diesel..

soundguy
 
   / how can ULSD gell at 105 degrees? #3  
Yup, my thoughts are you may want to talk to the fuel supplier. USLD shouldn't have anything to do with gelling of the fuel. They may have got a bad batch or someone may be tampering with the fuel.
 
   / how can ULSD gell at 105 degrees? #5  
It sure ain't coagulated alkanes or paraffin waxes at those temperatures.

Most likely it is living bacteria and algae having a good swim while degrading your contaminated diesel fuel tank!
 
   / how can ULSD gell at 105 degrees?
  • Thread Starter
#6  
There was some water in it but no particulates that I could see. What I shook out of my filter looked almost like raspberry jelly. It wasn't what I typically have seen with water in fuel. It must have been contaminated with something. I just don't know what. I'm going to take the sample I pulled to the distributer today and see what he has to say.
 
   / how can ULSD gell at 105 degrees? #7  
Water in fuel lets the algea grow... Sounds exactly like what has hppened.

soundguy
 
   / how can ULSD gell at 105 degrees? #8  
WTA said:
Anyone know how this can possibly happen in 105 degree heat

Was it a dry heat...
 
   / how can ULSD gell at 105 degrees? #9  
Try dissolving some in kerosene. If it's wax, it'll dissolve, particularly if you warm it up a little bit (by sitting a container in hot water, not over a flame).

If it doesn't dissolve, it's probably a algae gel.

Ralph
 
   / how can ULSD gell at 105 degrees? #10  
Yup, pick up some additive for algae. Happened to me one year. I treated my bulk tank and ALL my tractors. Still have some of that stuff on the shelf, just in case. Buddies father's tractor had issues and I went over and treated his tank. Said it ran fine after I treated it....
 

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