574 no diesel from fuel tank

[Hattrick]

I have a 1976 574 tractor that is not getting any diesel fuel to the filters. I ran some air backwards through the feed line at the top of the filters. It was hard to tell if it was plugged or not so i took the line off the output on the bottom of the tank and no flow. I then ran air backward through that bottom fitting into the tank and with the filler cap off it spayed diesel out the filler hole but still no flow. Hard to see in the tank as i just put 10 gallons of fuel in it. What am i missing? I have read in a few other threads online that this can happen with the tank but i was assuming they meant it was plugged. Before i drain the tank and take that bottom fitting off i wanted to see if anyone had any ideas or has seen this before. Is that bottom block on the bottom of the tank just an open gravity feed 90 degree fitting or it there more too it?

 

[Hattrick]

I figured out my problem. The fitting at the bottom of the tank i was plowing air in was the return valve. That must be a one way valve. And the hose i was blowing in at the filter was not the same line i was testing at the tank. This tractoe is new to me. I will figure it out.

 

[bob p mn]

I ran into that on a 884 I believe it was, the tractor had sat for several years and we got it running and then it quit. No fuel out of the tanks, took the lines off and they were oozing a black pine tar like substance, luckily it didn't get into the filters so we had the tank cleaned and cleaned the lines and everything was good. That tractor had the H type tank with 2 lines one may have been a return I don't remember any more but the fittings on the bottom were just elbows if I remember correctly.

 

[JimB2]

On that series of IH/CIH 54,74,84,85,95,32xx,43xx without a cab tractors with the "H" tank, looking from rear, the bottom right tank outlet is the primary filter input line, the bottom left is the return line from the "T" in front of the battery firewall that comes from the injection pump and the injector return line. There is also a cross over line on the rear between the two sides of the "H". The cross over is supposed to keep fuel level equal on both sides of the "H". Usual problem is junk in the bottom right of the "H" blocking the outlet of the tank to the primary fuel filter.

 

[Hattrick]

On that series of IH/CIH 54,74,84,85,95,32xx,43xx without a cab tractors with the "H" tank, looking from rear, the bottom right tank outlet is the primary filter input line, the bottom left is the return line from the "T" in front of the battery firewall that comes from the injection pump and the injector return line. There is also a cross over line on the rear between the two sides of the "H". The cross over is supposed to keep fuel level equal on both sides of the "H". Usual problem is junk in the bottom right of the "H" blocking the outlet of the tank to the primary fuel filter.

Thank you for the reply. It took me a bit to figure that out. The challenge is that the fuel lines kind of disappear and comw out on the other side. No i have fuel to the filters and to the pump. I need to try to bleed the air out of the pump as it has been sitting for 6 years. Somw debate online on how to do that. I have a few things to try at least. Also curious if the plungwr is stuck if i can somehow free it with not too much effort.

 

[JimB2]

Words of caution on the Bosch VA injection pump on the 574 with German D-239 Diesel engine:
1) Replacement parts are very rare, seal kits are still available.
2) Do not force the STOP/START/RUN lever on the side of the pump or it will shear off a pin that controls the metering valve.
3) Their is a site member @Dieseltech that rebuilds these pumps and gives good advice.

 

[Hattrick]

Words of caution on the Bosch VA injection pump on the 574 with German D-239 Diesel engine:
1) Replacement parts are very rare, seal kits are still available.
2) Do not force the STOP/START/RUN lever on the side of the pump or it will shear off a pin that controls the metering valve.
3) Their is a site member @Dieseltech that rebuilds these pumps and gives good advice.

I got the tractor running now. Runs real good. It idles too high and has no throttle control. I suspect that pin is broken off but i suspect that was done before i got it. This pin can be repaired without taking the pump off. It is a 2mm x 12mm pin and can be replaced pretty easily from the looks of it. I called Central Fuel Injection in Iowa as they had rebuild my injectors foe my MD some time back. They can rebuild them and can get some parts if needed. I won't be needing that at this point.

 

[JimB2]

If you want to download a free set of European IH Manuals for the IH 54/74 Series tractors built in Doncaster, UK in PDF format go to the link below. If your 574 serial tag says made in the USA then it was a crate unit shipped from Doncaster, UK to IH Louisville, KY, USA where the final assembly was completed. There will be some differences with the Louisville, KY tractors like the electric system will be Delco not Lucas, the remote hydraulic valves are different, the power steering is different but all the power train is the same.
Link: https://www.redpowermagazine.com/forums/topic/121219-d239-674-engine-manual-pdf/

 

[Hattrick]

If you want to download a free set of European IH Manuals for the IH 54/74 Series tractors built in Doncaster, UK in PDF format go to the link below. If your 574 serial tag says made in the USA then it was a crate unit shipped from Doncaster, UK to IH Louisville, KY, USA where the final assembly was completed. There will be some differences with the Louisville, KY tractors like the electric system will be Delco not Lucas, the remote hydraulic valves are different, the power steering is different but all the power train is the same.
Link: https://www.redpowermagazine.com/forums/topic/121219-d239-674-engine-manual-pdf/

Thank You. Mine is a 1976 US model based on the “U” in the serial number.