There's no reason to mess with the lines at the valve body. The lines only have to be removed from the accumulators.
I'll add that my bleed screw on the valve body was frozen. I bled off the pressure by cracking a line fitting at an accumulator. Since you have to remove the line anyway, it saves a step.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13