"Neil" wrote:

Whitedog, get a rubber 5" cap from Home Depot, fit a Schrader valve in it, then inflate the fuel tank to 5 psi (or cut out a valve and suitable amount from an inner tube and use a pipe clamp to secure it over your fuel tank filler. That pressure will definitely get your tractor running if nothing else is wrong, even if the transfer pump is worn and ineffective. You can check by opening the bleeders and let that air pressure push the fuel through.

That's what my fuel pressure it. It doesn't even register on my fuel gauge and my tractor starts easily. The gauge only starts to notice once the main engine is running and it stays firmly in the white range.

That's a quick easy test and you can use your gauge to confirm that you're getting that pressure. If you're not getting it on that gauge you fitted, then either something is blocking between the fuel tank and the gauge, or the gauge is ineffective.

I like the cap idea.drill and tap for 1/4 NPT and screw in a quick coupler. I have a regulator set up so I can put air to it.

So the Cat is now at my shop. The good news is that I bought an injector tester today. I have a DT466 international engine that I need to check the injectors, so I'll be able to get some use out of this.

Anyway, I put the injectors on the tester and they just don't look good at all. Lots of dribbling. One opened at less than 1000 PSI and one didn't open until over 3000 PSI. I don't recall the number, but it was way off base. It seems that I read that they should open at something like 1800-2000 PSI?

I was thinking of pulling the caps off of them to see if I can adjust the high one and low one just to see if I can get them to change.

Also, as it was running, I had the fuel lines hooked up and they were squirting much father than they ever were before expect for #3. It wasn't very excited at all compared to the others.

So, I think I will put the injectors back on the lines and a gauge in the port and see what I get. Heck, I may even install them and see what happens.
But first, I have a John Deere Backhoe to work on. Finally, something I am familiar with.

Congrats on getting it home and running. #3 might just be lazy for a bit. Also I would run it for awhile before I tried to adjust anything. Everything is sticky yet and when it does free up your adjustments will make it worse.

I see what you are saying about making it worse but I think I'll try the one that really high just to see if I can make it change, then turn it back. Maybe turn it one turn out, try it, then one turn back in.

I got out to fiddle with this again. I put the injectors on the lines hanging out in the air and fired up the pony motor. All of the injectors were squirting but once I knew the pony was going to stay running, I climbed down and only #4 was squirting. I installed my gauge and had about six PSI. I opened the bleeders on the pumps and had a stream of fuel at each one, but I recall before I pulled apart the tpump when I opened them, fuel was squirting out, not just a pathetic stream.

I definitely have fuel from the tank, so the problem has to be between the inlet to the TPump and the injection pumps. Everything after the TPump is clean, so that points to the tpump but everything in there looks good. There is alot of rust in the tank, so maybe it's getting to the relief and holding it open.

Hi Team,
if you have rust in the tank then you will likely have crud holding the Transfer pump bypass/relief valve open unless you have a pre-filter of some type in the tank line--crud will also settle in any low points of a supply line and slowly clog it too.

Crud can also clog up the tank tap/valve if large enough.
Looks like you are whittling it down and learning along the way.

Cheers,
Eddie B.

Get that rust and or any other crud out of that tank. You don't want any kind of crud in that tank but clean diesel fuel. You have to start at the tank and get it clean first. catskinner

Finally found some time to look at this again today. I have a clean, plastic jug with fuel in it as my fuel tank. I pulled the pump to check and clean the relief valve, put it all together and still no fuel pressure. I can pull the top filter bleeder screw out and fuel just dribbles out.

It's gotta be the lift pump.

So it's doing better now. I didn't put a Gage in it but the injectors are firing - kinda. I took a video of it with just the injection lines squirting then another with the injectors installed on the lines. Here are the links. (Maybe)