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Isuzu C240 Diesel Engine Troubleshooting
Sorry to hear about the dead Isuzu!! Thought that was nearly impossible, great engines. Here is a pdf file on the web. No text descriptions but you can zoom in and follow the fuel piping.
Maybe get on the phone with a parts distributor and sort this out. It has been too many years since working on one of these. But, if you are able to bleed the injection lines, the fuel feed pump and filter system should be OK.
Does it have an electrical or manual fuel shutoff on the injection pump? If electrical are 12 Volts present? Or has some interlock tripped, ie oil pressure, coolant temp or fuse. If manual shutoff, is linkage adjusted correctly?
These Isuzus self bleed the injection pump and injector lines very well. If you get fuel to the primer pump, they will usually start.
Hope this helps.