Re: 1100 shuts down while running.

I'd check the supply pump FIRST before messing around with the tanks. Question, with engine running does fuel shoot out the injection pump TOP COVER bleed screw? If not,
filters MAY need changed or supply pump is NOT working right. I've seen one of the two supply pump check valves fail, and when that happens engine WILL shut down for no
apparent reason. The constant bleed orifice on the filter base MIGHT be plugged too, and not letting trapped air out of the filter base as it should. If ANY air then
gets into injection pump engine WILL shut down.

Thanks for the reply.

I was only starting with the tanks because I didnt know where to start. I will take your advice and start with the supply pump. Im not sure about the top bleed screw. I dont recall having opened it with the engine running. I will do that tomorrow. The filters are brand new, so that will help point to supply pump. Those check valves were mentioned to me by someone else. That was going to be my next stop after the tank. I have supply pump in the parts pile if I need it.

Can you elaborate on the constant bleed orifice and its location? I tried to search for an exploded diagram, but havent been able to find one. I also was going to check out Agco parts books, but its down at the moment.

The constant bleed orifice can either be a banjo bolt OR a straight fitting on top of one of the filters, usually has a small line that ties into the injector top leak
off line. The bleed hole is about .020 inch and MUST be open to let any trapped air in the filter top can get out. When it's plugged air WILL get into injection pump
inlet and cause engine shut down until air bled again. Also, if NAPA/WIX fuel filters are used MAKE SURE there's NO O ring in the filter top outer groove, that's the fuel
inlet passage on those filters and MUST remain open. Lots of service calls to correct that common mistake..

(quoted from post at 22:22:45 01/23/21) The constant bleed orifice can either be a banjo bolt OR a straight fitting on top of one of the filters, usually has a small line that ties into the injector top leak
off line. The bleed hole is about .020 inch and MUST be open to let any trapped air in the filter top can get out. When it's plugged air WILL get into injection pump
inlet and cause engine shut down until air bled again. Also, if NAPA/WIX fuel filters are used MAKE SURE there's NO O ring in the filter top outer groove, that's the fuel
inlet passage on those filters and MUST remain open. Lots of service calls to correct that common mistake..
<img src="https://www.yesterdaystractors.com/cvphotos/cvphoto72463.jpg">

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Understood. Ill check what I can tomorrow and report back.

I checked what I could today.

The top bleed on the injection pump is consistently squirting fuel with the engine running. I cracked open the line on the constant bleed line off of the top of the filters too. At 1800 rpm I had to back off the nut several rounds before I could get fuel to seep out, and thats all it would do is seep. I expected more fuel than that, but I didnt have time to pull the line and check it and the orifice. I will dig deeper when I get a day off.

After today I'm confident that fuel is making it to the injection pump.

Me and a friend that is much more experienced with old tractors than I took each line loose from the tank to the injection pump and blew through them to make sure they were clean. We pulled the constant bleed orifice. I'm not convinced that it was flowing fully, but it is a tiny hole. I know that it's clean now. Everything is flowing well, at least while pumping it by hand.

I still have to check the seals on the filters and bowls. I feel like they're good, but I want to know.

The throttle surge is still there though. We adjusted the minimum throttle speed to about 850 RPM like the manual calls for. At max throttle it was around 2500 but when you pulled it back to minimum it wouldn't go below 1300 RPM. It's just really inconsistent. If you rev it up it just eases back down. It just floats. My other 1100 isn't like that, so I wonder about the integrity of the injection pump. The wire across the little front cover has been cut. Who knows who's been in it and what they've done to it.

Anyway. I'll check the filter seals and hook the bush hog up to put some load on the engine. May be a few days with work and the weather, but I'll let you know how it goes.

I got to run it today. No problems starting or idling around hooking up the bush hog for 20 minutes or more. It ran 10 minutes under load before it shut down. This time however, we had to prime the whole fuel system before it would start again.

I started watching when it started cutting out. Theres no visible air in the filter bowls. The filter gaskets arent blocking flow.

All I can think about now is the fuel tank. I mightve said I cleaned the tank strainer, but I didnt. When I pulled the right tank I used the left side drain because I knew it had a strainer in the right side.

Does anyone else have any more ideas?

I had the injection pump rebuilt and that stopped the weird throttle response issues.

Pretty sure the problem is that the tanks have a bunch of trash in them. I pulled the tank strainer, and it was really plugged up. I cleaned it and ran it for 30 minutes and it shut off again. I pulled the strainer again and it was plugging up.

I pulled the drain from the other tank and just kept pouring diesel in and catching it as it came out. Once the trash settled out, I poured the diesel back in and did the process all over again until the wasnt much trash coming out.

So far, so good. Ive probably got an hour and a half run time with no issues. It may have to be cleaned again, but I feel pretty confident this is what the problem is. Probably shouldve tried that before I started the thread.

Thanks for the help.