Posted by Hal/Eastern WA on June 26, 2012 at 11:29:09 from (97.119.244.50):
In Reply to: Drain diesel posted by jac69 on June 26, 2012 at 10:43:57:
Probably the easiest way would be to just open the air bleed on the diesel filter housing, and let the old fuel drain out. It might get messy, so you would want to be ready to catch the draining fuel. I would use a clean container, to see what the fuel looks like, and as I am definitely cheap, I would probably use it for something, if not in the tractor.
When it is drained out as much as possible, I would change the diesel filter cartridge. I would also open up the old cartridge to see if it has much mess in it. Before adding fuel to the tank, I would get a small flashlight and look into the tank to see if there is crud in the bottom. If there is, you probably should consider removing the tank and cleaning it out with a solvent like lacquer thinner. When I have cleaned out tanks, I add a bunch of drywall screws and shake them around with the solvent. The sharp edges on the screws seems to help remove the crud in the tank, and then they are fairly easy to get out with a magnet.
With your cleaned tank reinstalled properly, add a couple gallons of diesel to check for leaks. Then open the air bleed on the diesel filter housing and let all the air escape from the new filter and housing until only diesel comes out of the bleeder. While there still might be a tiny amount of air in the system, it shouldn"t be a big problem.
As I typed this, I have been wondering how you know the diesel in the tank is bad? In 4 years gasoline will evaporate a whole bunch, leaving a messy, smelly residue that might very well cause carb problems if you try to use that fuel. But diesel does not evaporate nearly as bad. I have heard of problems from algae in diesel, but have never experienced it myself. I also have never tried to start a diesel that has not been run in nearly as long as 4 years. But I guess I still think that the diesel in your tank might be just fine as is, unless it looks bad or smells a lot different than new diesel.
But, if it really concerns you, draining the tank is probably the safest thing to do. And a new diesel filter is ALWAYS a good precaution in an unknown situation.
Good luck with your 861D. I have enjoyed my 641D for many years and would LOVE to have one with live PTO!
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