Ok, so I’ve run into a huge problem. My little run around farm tractor, a John Deere 755, won’t start. The motor has compression, everything electrical seems to work, with the glow plugs working too. However, while trying to turn it over, no diesel comes through the line. I have some clear fuel line on in different places, and there’s no sign of fuel being pulled through the pump and sent to the injectors. The connections to the pump appear to be intact and working, but I’m not sure, so I’ll check again. There’s no obstructions in the line and no air, as I’ve bleed it twice. It won’t start on starter spray either (diesel formulated). The pump used to make a electric noise when turning the key before starting, which I believe was to prime itself, which it no longer does. I’m thinking the pump is toast and I need a new one. Has anyone had experience with this or can confirm my diagnosis? Please help me figure this out.