Ford 881diesel; injector pump issue

Bought a "59 881 Select-O-speed
diesel yesterday (ordered manual
set due Friday). Pre-checked had
full tank of fresh diesel, and new
filter cartridge, all fluids checked.
Oil P/Eng temp green all the way.

Drove unit 28 miles to the farm,
stopping and starting her several
times, without any trouble when
it suddenly died in 9th gear,
about 2/3rds throttle only 300
yards from the gate...

I"ve determined cause to be a fuel
problem. In my troubleshooting
attempts; I first checked fuel level
in tank, then broke the fuel line
downstream of filter at pump
inlet and had flow, so I loosened
pump output fitting nut opposite
input fitting (top of pump), and
had some fuel, little flow. Broke 1
of 4 injector lines at block/injector
- no fuel.

I didn"t ID any inline elec.
solenoid fuel shutoff valve,
witnessed accelerator lever
actuating pump swashplate thru-
shaft, all fasteners and safety-wire
were in-place, no obvious leaks,
mounting bolts secure, so I
turned starter momentaril, but
witnessed no fuel output at
injector fitting.

Seeing no priming pump lever, I
applied some (1-2psi) positive
pressure in tank in a feeble
attempt , to prime, didn"t seem to
pass-through pump/piston assy. I
didn"t break the tank return line
connection.

Is it possible that a foreign object
in the tank (rust etc) might have
starved pump, if so; best way to
prime pump? Or should I assume
the coupling or pump drive
mechanism has failed, is this
common in this design? Any
suggestions on determining if
connecting drive or internal
elements have failed?

Here are thanks in advance for
your assistance - Charlie

You claim you've never posted on a forum before so here's a word of advice: slow down! You've posted this same question 5 or 6 times now.
Here's another answer:
"Any suggestions on determining if connecting drive or internal elements have failed?"
There is a "timing window" cover attached to the side of the pump with 2 screws. Remove the cover and will see 2 plates- an upper and a lower. Each plate has a vertical line machined into it. The upper plate doesn't move. The lower plate rotates when the engine is turning. Crank the engine over and if you see the timing mark on the lower plate move past the window then the injector pump drive is intact. The drive is driven by the camshaft exactly like a distributor on a gas engine. There is a drive shaft with a weak spot machined into it that is designed to shear if the injector pump head locks up. If yours has sheared the lower plate in the window will not rotate.

Hey Texas! Makes sense (both posting and inspection plate - lol)

Thanks, I'll try that first light.