Posted by tractorsam on July 18, 2009 at 13:03:44 from (99.192.80.193):
In Reply to: MD fuel problems posted by Wilamayb on July 18, 2009 at 12:51:04:
I will try to help you but most of my experience is with a Super MD and there was some variance in the fuel systems on these so if what I say doesn't make any sense that's probably why.
First off, will the tractor run on gasoline? If so it'll make what you're trying to do a lot easier. The frontmost filter is the final filter and the rearmost is the primary filter.
The small tube that goes into the glass bowl is for draining water out of the bottom of the bowl without removing it every time. There should be a small screw with little 'wings' on it on top of the bowl, releasing that screw will drain water from the bottom of the bowl via that tube.
Fuel flows from the tank to the bowl, from the bowl to the primary (rear) filter which is bled with the tractor not running and more that half a tank of fuel. It then flows to the rear of the injection pump where there is a small gear pump (which is why you're having to pressurise the tank to get fuel to flow past this point) and a filter screen. The filter screen looks something like a 2" length of 7/8" hex bar, the end of which screws off and brings the screen out with it. It points out from the side of the tractor. It then flows from the pump to the secondary or final filter (which is normally bled with the tractor running on gasoline). It then follows the almost conventional path to the injector pump and out to the injectors.
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