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DynamaxGS

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  1. Charlie - Thanks, and yes, you only have to get doused once on the truck pumps to know that they have way too much volume. I have consistently used the auto diesel pumps since that first dousing. It seems to me that a properly designed fuel system should allow you to insert the fuel nozzle in the fiiller tube, set the latch to the slowest fill rate, and expect it to shut off properly without a spill. This isn't possible with my tanks. I use the smaller pumps, pump fuel manually as slow as I can and I still get fuel blowing out the filler tube. I've started to use a small flash light to see into the filler tube and I'm learning to "listen" to the fuel to know when it is getting to the maximum level. This can't be even close to right. After some research and assist from other contributors, I'm pretty sure there is a major problem with the venting in my tanks. Thanks again for the comments.
  2. Brett - Thanks for looking into this. Your suggestions, plus some sources provided by Wayne suggests that this is a venting problem. I will check soon to see if the vent tubes are properly sized and connected to the filler tube ports. From what I've read it appears that the worst case is that the service center has to drop the tanks and install a larger vent tube and check valves. Hopefully I have a kinked/blocked vent tube that can be easily rectified.
  3. I'm a new owner of a 38 ft 2004 Dynamax Grand Sport on a Freightliner FL-70 chassis. It is a beautiful rig with less than 15K miles on it but it has one aggravating flaw: the rig cannot be fueled normally by inserting the fuel nozzle in the filler tube and setting the latch to fill and cut off automatically. At some point fuel will spurt out of the filler tube in a big gush before the nozzle can detect the fuel and shut off. You only have to get doused with diesel fuel once to know that you have to figure out a way to prevent it. I've tried opening the other tank filler tube (it has two 45-gal tanks with fillers on each side of the cab), filling as slowly as I can, etc. but it always tends to overflow. It takes a good half hour to get as much diesel in the tanks as I can but I can never get it more than about 80% full and I'm not making any friends with my RV colleagues who are waiting for the pump. I've started to fuel only at off hours or where there are many free pumps so as not to alienate others. I can't believe that Freightliner designed this system this way; there has to be some glitch somewhere (venting, interconnecting tube from tank to tank, etc.). The previous owner briefed me on this. I went ahead and bought the rig because it is so outstanding otherwise, the price was right and on the theory that I could find the problem and fix it. The previous owner had taken the rig to Freightliner during the warranty period but they said they could not find anything wrong with it. Before I take it to another Freightliner facility, I thought it would be worth checking this forum to see if anyone else had ever experienced this type of problem. Any ideas?
  4. Dave - I'm a new owner of a 38 ft Dynamax Grand Sport. I plan to tow a 2009 Honda CR-V but have not yet invested in hitch or braking system thus my interest in this forum and particularly your comment about the air brake option being the best way to go. Can you tell me a bit more about how this works? I have a separate air brake line for a tow with air brakes, but how is the CR-V modified to connect to this? Thanks in advance.
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