I have a friend who is trying to get a few yards. He has looked at a couple of mowers. They are the Turf Tiger and Deere 757. I have the Turf Tiger and have used the deere zero before. My personal preference is the Scag all the way. We went to look at the Deere in more detail. And after comparing the two we were wondering is the Deere a single hydro???? I couldnt find but one pump on the mower and the brochure said it has a "single-body dual-unitized Kanzaki pump."I asked the dealer and he said it was a single pump but it hold alot of fluid and that was what kept it cool? Any info on the number of pumps would be appreciated.