@IvanK: mostly I agree with you, but there's one point which still is questionable.
The Fuel distribution system with its levers. Both manuals states that you can pump fuel from both reseve tanks into of of the main tanks! There's is nowhere mentioned that you can pump it directly in both main tanks. That is also shown in the diagrams that I posted before.
Here is the text from the BAL (single pump system)
BAL fuel.jpg
It states clearly
Quote:
"d. Fuel distribution in the flight
Lever of the surgeside of the valveswitch can on all four, Lever on the pressureside only on both foreward tanks be switched. That means contant of all tanks can be pumped into the right or left foreward tank.
intertank transfer
1. Lever of the surgeside of the Valveswitch to the right or left rearward tank.
...
2. Lever of the pressureside of the valveswitch to the right or left foreward tank (main tanks).
3. Switch ( besides valveswitch) in position "Ein" (ON).
4. enlightens restfuel warninglamp of the drained tank, then switch to "Aus" (OFF)."
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But that only counts for the early single fuel pumpsystems.
The interresting part is the text in the KBA with states both systems.
KBA Pumpventil.jpg
Last sentence on the left side:
Quote:
"By mounted new fuel system(...) only the fuel of both rear tanks will be pumped simultaneously into either the left front or right front tank."
First sentence on the right side.
"Shall the content of the rear tanks be pumped in one of the front, then lever of the valveswitch to the regarding front tank and switch the pumpswitchlever (Pumpschalthebel) to position "Ein" (ON).
Drops the fuel pressure below 1,1 atü, then through moving of the switch (besides the valveswitch) to position "Ein" (ON) activate the height pumps."
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That shows that the drawn positions on the diagrams are correct.
You can't select both front tanks at the same time. That counts at least for all C-1 and C-2 planes.
The D-series has another valveswitch, which is also in the E-series.
But since the C- and D-series run parallel it might be possible that later Cs also were fitted with the new valveswitch, but that's speculation.
For sure is, that in the repair yards the C-series planes were sooner or later also fitted with the same valveswitch as the D- and E-series. See the attachment of the KBA.
Edit: I can't write fast enough before the forum kicks me out...