I started my David Brown 780 to warm up a bit then shut down and replaced both fuel filters. I bleed according to the service manual order but I get no fuel at the injectors. I have air-free fuel at all bleed points but nothing at the injectors or the injector pump outlets. The fuel cut-off lever is open and the throttle wide open but no fuel from the injector pump while cranking the engine. I've gone through all the bleed points in order three or four times while using the fuel pump lever, captured fuel in a container to verify no air bubbles but still no luck. Here are the bleed points in order:
1. Vent plug between the two filters
2. Filter outlet
3. Injector pump vent plug #1
4. Injector pump vent plug #2
5. Injector pump inlet (from filter outlet)
I'm stumped. Any ideas? Thanks.
1. Vent plug between the two filters
2. Filter outlet
3. Injector pump vent plug #1
4. Injector pump vent plug #2
5. Injector pump inlet (from filter outlet)
I'm stumped. Any ideas? Thanks.