Bosch VE injection pump problem

I serviced a Case tractor this afternoon. Replaced the fuel filter. Bled it up and then started the engine and had it running for several minutes, with no problem. I then went and changed transmission oil, went to start the engine and it would crank , but not fire.
Bled fuel filter again. Tried again, but still no start. Checked power supply to stop solenoid. It is good and solenoid is clicking when power is applied.
I cracked fuel lines and got back into the can and cranked engine. There was no one there to do it, for me, so that I could watch the lines. Got back out and there had been fuel coming out. Tightened the lines and tried to start again. Still no joy. I got out and cracked the injector lines again and one of them had fuel, continually running out of it. If I operated the priming lever on the lift pump, the flow increased. Tried tapping the pump, to see if anything was stuck, but that had no effect.
Am going back to it in morning, will bring a helper, to operate starter, so I can watch fuel lines.
Had anyone had this problem before? My thoughts are something has stuck inside , or is worn inside the pump. @thepumpguysc ,
Thanks Bob

I would check a few other simple things first, before condemning the VE pump. I’ll toss a couple ideas. The system probably just needs primed.

Check to see if the fuel shutoff solenoid is getting power and working. Should be able to feel or hear it click when you turn the key on.

Double check the fuel level and make sure you didn’t double gasket the fuel filter or forget to install the small gasket.

Does it have a fuel transfer pump? I believe it does. Might even have a lever on the transfer pump for priming the fuel system. Try that.

I’ve discovered bad transfer pumps before when changing fuel filters. The system barely works and then stops working/unable to prime after the new filters are installed. The VE has its own transfer pump. Often enough to keep it running. Until the next service.

Of course, you can’t test it, because it’s not running. It’s a diaphragm pump, I believe, so you can check the weep hole for a leak and smell for excessive diesel fuel in the engine oil. It’s not scientific. Or, if you have enough reason to believe the transfer pump is weak, it’s easily replaced.

I never mess around bleeding individual injectors. Just get good solid fuel to the injection pump and it will do the rest. Clear hose may be what you need to see if it is getting the fuel it needs without air.

Check your overflow valve for debris. Check your filters and lines for air intrusion.

If u have fuel streaming out of the lines AT THE INJECTORS by using the hand primer.. u got something wrong in the injection pump.!!!
Each cyl has a delivery valve in the piece that you screw the line to, on the pump.. the dv is held onto its seat by a strong spring.. it shouldn’t be lifted by a hand primer... so u got something wrong in the pump ..
unless you know what’s under that dv holder, I don’t suggest u loosen it.. BESIDES, it has a 1x crush gasket..

Thanks guys for your help. I went back to it yesterday morning. I took off, all the injector lines , at the pump end and turned the engine over by hand and operated the hand primer at same time. I got fuel, running out of 3, of the pipe unions. Not squirting a shot out as, it should.
I then took out the stud fitting, with the overflow valve in it and got some air. I checked the valve , using a small Allen key , to depress it and found it to be stuck. I managed to free it off and washed it out with brake cleaner. I used the primer and pumped a lot of fuel through, then put fitting back in . Tightening it as I pumped the primer.
I checked the outlets again and was still getting fuel out, only using primer pressure. I rerouted the lines, then cracked them at the injectors. Cranked the engine, till fuel came out. Tightened them up and tried starting. It started and ran ok, left it for several minutes, then stopped it and started it several times, with no bother. Farmer went and used it for an hour, as I looked at his other tractor, with no problem.
I reckon, the pump is going to fail totally, in the near future. It has done 8500 hours.
I am kicking myself, for not checking overflow from pump . I think I became fixated on fuel running out of the lines. A long day , cold and getting dark, didn't help my thought process. Sometimes, you just have to walk away for a while and come back , with a clear mind and a fresh pair of eyes.
Thanks again guys

Remember to always prime filters from the outside in. Never let unfiltered fuel enter the center hole.