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12-Volt Fuel Pump Used To Empty Fuel Tanks
Emptying his combine’s fuel tank at season’s end is a breeze for Jim Martin. He accidentally discovered that his field supply tank’s fuel pump can move fuel in or out of tanks.
  “The first time it happened, I couldn’t figure out why the fuel wasn’t pumping into the tractor’s fuel tank,” says Martin. “I went over to check the supply tank and, as I approached, the cap blew off, and gas flew into the air.”
  What Martin discovered was that the battery cables to the 12-volt pump had been switched so the polarity was reversed. Air was being pumped into the fuel tank, pressurizing it until the cap blew.
  Since then, Martin has put the information to work, emptying fuel tanks. When selling a dozer with 70 gal. of diesel in it and a tractor with 80 gal., he was able to remove excess fuel. He pumps out a 275-gal. home heating fuel oil tank the same way.
  “I insert the hose to the bottom and then pull it up 6 to 8 in. to avoid emptying out the water and sludge that can build up in a fuel tank over time,” says Martin. “If it’s going into an expensive tractor, I run it through a filter first. I also remove the fill cap on the tank I am pumping into. That prevents pressure build up and lets me see when the tank is full.”
  Martin says the two-way fuel pump has been especially helpful in the field when one tractor is running out of fuel and another has plenty in it.
  “Whether doing an emergency fill or emptying out a tank, it’s a lot easier than draining a fuel line into 5-gal. fuel cans,” says Martin.
  Contact: FARM SHOW Followup, Jim Martin, 6095 Old Hannover Rd., Spring Grove, Penn. 17362 (ph 717 225-4511).



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2013 - Volume #37, Issue #3