Yes. The only thing that the hand pump does is move fuel from the tank through the system. The Injection Pump is what delivers the fuel to the injectors (lines) at the correct time. If you could pump through the IP with the hand pump then there would be something wrong with your IP.

__________________
'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.