2240 Injection pump problem

gary49 · Nov 28, 2019

I bought a 2240 in July. It is a 1981 model, so the later series and a Mannheim tractor. It ran well when I bought it and have changed all the fluids and filters, cleaned the hydraulic system screen and have been fixing the issues an old tractor like this one has: new starter switch, new tie rod end and drag link, got all the lights working, etc. I think this tractor must have been used very little in the last few years, since it had a date on the air filter of 6/11 and the filter wasn't very dirty at all. Also it had a few things that were tight and somewhat rusted such as the brake tie bar. I mainly use it with a back blade to maintain my 3/8 mile long driveway and will plow snow with it. Last time I used it was a month or so ago to pull a trailer with 2 and 5 year old grandsons up the driveway very gently. Anyhow, noticed that the fuel filter was leaking while it was sitting in the shed and determined it was the filter itself, so installed a new one. Then I had a very difficult time bleeding the air out of the system. Thought it might be the screen at the inlet of the injection pump, cleaned that out, but there wasn't really much to clean out, it looked good. Also made sure the return line was clear. Finally got it to start, but it only will throttle up part way, and the idle isn't as good as it was. Some online research leads me to believe the injection pump is headed South, perhaps the governor ring is broken. I'm thinking the Roto diesel pump will need rebuilding and I might as well get the injectors done while I'm at it. Should I try to get a rebuilt pump and injectors from the dealer or find a diesel shop and get them to rebuild what I've got?

thepumpguysc · Nov 28, 2019

If its a CAV DPA pump, it doesn't have a "gov. ring" perse'.. not like the one that breaks up in a RoosaMaster/Stanadyne pump..
Its usually always less expensive to have your original pump & injectors rebuilt.. {by hundreds}
Feel free to contact me if I can be of assistance..

petryss · Oct 5, 2020

I had a similar problem. I had the injection pump rebuilt and new injectors installed. I have been using my 2240 about 2 weeks daily and all was good. Yesterday I was cutting hay and the tractor started to rough idle. My first thought was low on fuel. I shut it down immediately and filled the tank. It wouldn't fire off so I bled the injection pump til I had a steady 18" stream, then each injector til good flo. Still no start until I used a little ether. It fired off but runs at rough idle then quits. Won't start on it's own. I took the injectors out and had a diesel shop test them. They are good. I think we have a similar problem. Haven't solved mine yet.

gary49 · Oct 5, 2020

Sorry I知 not going to be much help. I still haven稚 fixed mine, but I am planning to call an injection pump shop and take the pump off for rebuilding in the next week or so. I have started the tractor a few times, starts ok, but it runs very weakly. I think I壇 call the shop that rebuilt your pump if I were you and see what they have to say, One thing I致e read is that the return lines can cause problems, but I値l bet the pump shop has some ideas about what might be wrong.

Tx Jim · Oct 6, 2020

I wonder if check valve on inj pump that fuel return line attaches to is clogged with foreign material? Loosen bleed screw on IP body then attempt to start engine. Did you check for clogged filter in the inj pump fuel inlet?

gary49 · Oct 12, 2020

I did look at the check valve and blew through the return line to make sure it was clear. Also looked at screen on inlet line at pump. Finally took pump off and took it to a diesel shop. Might be ready to pick up Friday.

gary49 · Oct 19, 2020

Got the pump back from the diesel shop, installed it, bled the fuel system and the tractor is fixed. Didn稚 do the injectors, shop suggested doing the pump first. They said the inside of the pump was pretty grungy and that I needed to clean the tank. I壇 already looked at the tank, had drained off the bottom of the tank until the fuel ran clear. I知 already using Power Service in the fuel. I added an in-line filter ahead of the factory filter, will hit the tank with some Biobor, just to make sure I don稚 have an algae problem. It痴 running just fine, ran it for about an hour and a half, good to have it back in operation.