George....I've made several vents for friends. I dont have one cause I have a 110v diesel pump mounted on a 55 gallon poly drum. When empty, I load it up on the trailer and take it into town and fill it with diesel. I do have a couple vented red gas cans thou. So, I've never built one for myself. What I've done is, take a 3/4" long bolt and drill a hole down the middle. With the bigger diameter bolt, the larger the hole you can drill. I then took the bolt and put it in a lathe and machined about three or four threads off at the head end. Then get you two "hydraulic" type O-rings. If you get a big enough bolt, you can drill a rather large hole all the way through the bolt, you can also run a tap down the hole and then screw a stud into the hole when you get done fueling your tractor. Once you get the bolt drilled and tapped for threads and you have three or four threads cut off by the head of the bolt. You then drill a hole in your fuel can. Remember when cutting the threads off, just cut the threads off enough so that you get the same pitch diameter as the threads. Use a dial caliper. It will tell you the inner OD of the threads. When you do this, screwing the threads of the bolt into the hole of your fuel can, it wont enlarge the hole that you already drilled. Then put one hydraulic O-ring on the bolt, fish inside of the fuel can. Once you get the bolt into the hole, put the other hydraulic O-ring on and then screw a nut and tighten the nut enough so that you dont rip or mess up the O-ring. When you get a bolt and nut, make sure you get stainless steel. A stainless steel bolt and nut will nut rust and the hydraulic O-rings will handle diesel fuel. Also get a stainless steel stud. Its not a hard vent to make. The hardest part is fishing the bolt into the fuel can and screwing it into the hole. Every so often, check the tightness of the nut. If it does not stay tight, put another nut on. It will stop the other nut from loosening up.
I do have another method of building a fuel pump and a electric motor. But most would say it dangerous. I've built a pump (gear driven) and electric motor when fueling my waste oil burning stove. This pump and electric motor could be used to pump diesel fuel. I have a you-tube video of it. It will move 6 gpm of waste motor oil. I'd say it would move 10 gpm of diesel. The video does not show it pumping waste motor oil, but it will give you an idea. Under my you-tube name at the top right, click on "
more info". That will explain what I used in making this pump and electric motor.
Maybe something for you to think about.
YouTube - Waste Oil Burning Stove Oil Transfer Tank And Pump
Thanks,
Cliff
