Any one have a injector pump diagram handy. I heard there is a spring in the top that sticks closed. For some reason the truck has fuel coming in the pump going out the return line but can't seem to get it to all the injectors. Only 4 are looting out fuel? Any ideas tried fuel treatment and a little atf.

 

You can go to the following URL and download the DB2 Injection Pump Operation and Instruction Manual and Torque Specifications both in .pdf near the bottom of the list:

Index of /Ford

 

This here is probably the best visual reference we have:
That video is great; the only difference between that and our pumps is we have a light-load advance cam pushing on the cam advance pin at the bottom.

 

I looked all over for a Service Manual to address an injector pump from a John Deere 50 kva three phase generator. Its a Roosa JDB model. I finally found one. Tore the pump apart and scrubbed out the dried diesel varnish residue thats been sitting since new 30 years ago. I didnt realize until downloaded the DB2 manual for my 6.9 that its basically the same pump. Almost identical in regards to disassembly and components. Adjustments vary, but not an issue. After going thru the John Deere pump, I am not so apprehensive about working on the truck pump if the need arises.