Any Perkins diesel experts here?

I have fuel right up to the injector pump inlet, but can't get anything out of the pump. The manual stop is in the run position, the solenoid stop is removed and I've checked visually that the pump rack is in the run position.

It's a Zerex plunger type pump, one plunger for each injector. The original pump went back on the engine along with the original cam, and I replaced the old shims with new shims of the same thickness, torqued everything to spec, I'm sure the cam is timed properly, etc.

Any tips as to where to look next would be greatly appreciated.

If you are lucky enough to have injectors with bleed fittings on them, loosen each bleeder one at a time, then crank the engine with the governor wide open and the stop lever in "run" until fuel runs solid. If the injectors do not have bleeders, loosen the fuel line nut at each injector, then crank the engine as above to let the air escape.

When the air is out of each line and the bleeder or fuel line nut is retightened, that cylinder should begin firing (or at least give white smoke out the exhaust) when you crank.

Be careful! While bleeding, wrap a shop rag around the injector to catch the fuel and KEEP HANDS AWAY! Fuel can escape with enough force to puncture the skin and cause blood poisoning.

Feller at the local Perkins parts distributor thinks the pumps are shot. Says they'll get quite worn and work okay until they lose their prime, and then you can't re-prime them. I'm waiting for a second opinion or three on that, as I'm sure a replacement pump rack is gonna be a mite spendy.