All the more reason for the bastard to be the critical engine. The one I flew in fact did not have the optional pump. I did at one point in my training have the "luxury" of "getting" to pump the gear down. I had to circle for about 10 minutes until I got 3 green and one in the mirror. My instructor laughed at me the whole time and said that everyone should have that experience that at least once in their training.
His advice: think about slamming the gear down while the left prop is still turning providing the hydro-pump with pressure. Then once its down, feather it off and secure. Yeah...that was MUCH easier.