The fuel feed and return lines should still be installed unless you also removed them for another reason. They are both at the fuel filter. Feed is into the pre-filter and return is the hard rubber line comming off of of the main filter housing. You'll have lots of fuel, turst me.

I think pumping wiht the metal lines disconnected from the injectors would be cleaner than pumping out of the del vavles but both will work.
Dont take anything else out of the valve other than the washer and spring. The diagram is not accurate....the washer and spring will be on top and the sprring will fall and get lost if you arent careful when you lift the valve body off the IP. You dont want to mess with anything below the spring, bad things will happen.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)