Indeed it was, it filled like a beauty yanking back slowly on that chain with no mess or grief whatsoever. I put the dispensing head back on and released the lower control valve and it bled perfectly.
It is even easier than that. The piston that pushes the grease is free floating, another plunger pushes against it under spring pressure but isn't fixed to it, so pulling back the chain doesn't create a vacuum. Just pull back the chain and lock it and push the cylinder into the grease, the floating piston will be forced back up the tube.
Thanks for reminding me to get one of these excellent devices.
