Originally Posted by spartacus
The pump makes life a lot easier.
Make sure the little threaded fitting on the hose fits your drain hole [yes, I did type that correctly. See below.) I suppose it would be possible to hold a hose in position and fill, but the threaded fitting means you need one less hand.
To clarify the above statement:
When draining, remove the top plug, position a catch vessel, and remove the bottom plug.
Once drained, pump fluid into the bottom hole until it begins coming out the top. Install the top plug. Then remove the fill hose and install the bottom plug.
I think they do this to prevent air bubbles from interfering with a complete fill, as the fluid is pretty thick.