You might be able to avoid all this battery-killing cranking by hooking up a mityvac to the appropriate fuel line and suck the fuel through the system manually. My fuel system is all re-plumbed for my WVO system, so it's hard to tell you which line you should use, but the line just before the injection pump would at least pull the fuel to that point. Maybe the return line coming out of that banjo fitting on the secondary filter would suck it all the way through? Maybe someone else could chime in here...

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1987 Mercedes 300D ~200K (Greasecar & Biodiesel)
1993 Ford F-250 7.3 IDI diesel 165K (Biodiesel)
1996 Thomas/International Bus with DT466 engine