Re: Air or trash in diesel fuel system on IH574

Subject: Re: Re: Air or trash in diesel fuel system on IH574

Comments:
: : I just bought this tractor 2 weeks ago and I have : : this fuel problem I cannot figure out.The tractor : : has not been run very much in the last 2 years : : but right before that time the injector pump and : : the 4 injectors were rebuilt.The motor was re built at that time also.I drained the old fuel out of the tank and changed the 2 fuel filters : : and the tractor started and ran fine for about 2 hours.Then while bushoging it began to run like you were operateing the throttle back and forth real fast and would not steady out untill I throttled it down some.I noticed before and after : : this the maxium rpm's would vary.I hope this is a hint to problem when I installed new filter elements and bleed the system by unscrewing : : the bleeder screw on the secondary filter : : these 2 filters are side by side and have glass : : bowls on bottom the primary filter filled up fine glass bowl first like its supposed to but the fuel ran out of the bleeder screw on the secondary filter before fuel was seen in the glass bowl on the sconday filter.I had to open the bottom on the glass bowl to fill it up. : : the tractor is currently running good but real hard to start?PLEASE HELP!!! : Steve, When a tractor sits more without running it always has more problems with moisture condensing in the fuel and bacteria developing in the moisture contaminated diesel. The bacteria developes into a black mess in the bottom of the fuel tank. : You should pull the bottom fuel shut-off valves, the fuel level sending unit and the tank cap and flush out the tank with clean diesel. A long air nozzle will sometimes help break up more debris hanging around the insides. : Also on fuel, I always think it's best to stay with the origional brand that came with the tractor. No willfit filters have been as good. Also check on the glass bottoms to see if any water is floating in the bottom of the filters. Clean it good! : Also check the fuel return line coming from the injectors back to the line on the left side of the engine. There are several types, but these can get cracked and let air into the system to cause harder starts etc. : Don't reuse a fuel filter if you see the black bacteria in the tank. Park a tractor in a shed if you can to help the problem not develope again as quickly. : Milan : Milan

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