Michigan 175A, GM ?Detroit? Diesel won't run. Bleed injectors?

I have this loader that has been sitting for ~10 years. Trying to get it running.

Fuel tank had ~an inch of fuel in it. Looks like OK stuff. Poured in another 5 gallons.

Cranked the engine over. Gave it a sniff of starting fluid and it started right up. :) Yay.
It ran for ~ one minute and started loosing power, wouldn't rev anymore, finally died. :(

Took the fuel filters off. They look good. Filled them up with new fuel and put back on.

I pressurize the fuel tank and got fuel to the fitting on the end of the tube coming from the tank. (RED line in my picture)
I got fuel to the outlet of the first filter, so the filter is filled. (Start of BLUE line in my picture)
I got fuel to the other end of that (BLUE) tube to the ?intake? of the ?pump?. (Filled the BLUE line in my picture)
I got fuel out the other side of the ?pump?. (Start of PURPLE line in my picture)
I got fuel to the fitting at the top of the (PURPLE) line to intake of the ?secondary? filter. (Filled the PURPLE line in my picture)
I got fuel to the outlet of the second filter, so the filter is filled. (Start of GREEN line in my picture)
The other end of that (GREEN) tube goes into the block somewhere.

I kept air pressure in the fuel tank and tried starting, NO GO. :(
A sniff of starting fluid in the air intake and it almost acts like it might run but no kick.

NOW WHAT?

Do I need to bleed injectors somewhere? I don't see coiled tubes from a pump going to individual injectors.
I see allen head plugs on this left side of the engine but nothing that looks like injectors or covers.
Are there injectors inside the covers on the right side of the engine? I expected that was valves. Didn't crack them open.

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