Believe it or not there are still ALOT of people out there that think that algie growing in diesel fuel is nothing but science fiction. That being the case when they hear about bad fuel all they know to do is say, 'your getting bad fuel', or simply that the fuel is , 'full crud'. Unfortunately it's often not "just crud" if it's causing problems like you are describing. I say this because in a stationary system any "crud" or solid contaminates in the fuel are usually gonna sink to the bottom of the tank and stay there instead of getting continually sucked into the filters. Unless of course the suction tube is sucking directly off the bottom of the tank, an in that case your destined to have problems over time regardless of where the fuel comes from. Now in a mobile application the fuel is constantly getting sloshed around and solid contaminates can be held in suspension in the fuel and make it into the filters that way. Again though, in a stationary application that typically doesn't happen, so if filters are continually clogging whatever is doing the clogging is staying in suspension with the fuel, and not settling out like your typical 'solid crud' should do. What your seeing fits the profile of the way algie works to a tee.
Just to show how many people and companies don't know about the algie is, even in the equipment industry, think about this. I talked to the service guy from a one of our areas largest rental chains a few months back when he was on customers job changing filters on a machine one of my customer was renting. My customer said they were having him out at least once or twice a week and he was almost spending more time with the machine down due to clogged filters than he was running it. According to the service guy they had several pieces of equipment suffering from the same problem. I asked him about algie in the fuel and got a blank look. Asked what they had done to clean the tanks and he said they had drained them and steamed them with chemicals and were still having the same problem. Asked him if they used an algicide and he had no idea what it was. Long story short my customer had some Biobore on hand and I suggested he put some in the machine. One or two more clogged filters later and the stuff was dead and gone and he never had any more problems out of the machine during the time he had it.
When I first started working on equipment growing up, to find it in the fuel here on 'dry land' was unusual. In fact if you'll look product like Biobore were origionally targeted mainly to the marine side of things because there was a greater likelyhood of finding water in the fuel from tanks that were continuously in or around the water. Over the past ten years or so it seems to have become prevelant pretty much anywhere. It's almost a given that there will be a little bit of water in every tank, and that's all it takes for the stuff to start growing. Once it gets a start it can turn a tank of good fuel into crud within a very short period of time. The tank on my customers crane I mentioned in my first post held nearly 250 gallons and within two weeks of opening it up and steam cleaing it out, using chemicals, the stuff was back in full force and clogging the big sock filters that were used on the Murphy diesel that powered the machine.
In the end algie can and does get in the fuel. Call it what you will it is one mean critter to kill off and get rid of once it gets into a fuel system. Never figured it all out but it can just get into a system and you have no idea how it got there, or it can easily get intoroduced into the system when your getting the tank filled. Either way once there it will not go away without an algicide.
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