This one actually has hyd dump.. though I like the trip dump scheme too. It was actually way cheaper to setup a trip dump loader as you could simply chain the rear lift arms down, and then run a hose from the pressure test port on either the hyd cover or the pump base and then hook that right to the lift cyl.. and just use your tractor's 3pt control for lift, then just pull the line for trip dump... no extra 200-600$ valve to purchase. On the full hyd loaders like this one.. you needed a dual spool on the hyd cover.. or a seperate pump on the crank (stinger) and spool setup. Dual spools run about 600$... but you get to keep using hte 3pt. That's how i set mine up.
All the laoder frame is on one side... very easy to get on / off the tractor with no loader frame in the way. These 1 arm jobs, as I posted.. had excelent specs.. especially considering the front axle design of the tractors. They were made to be mated/unmated in 15 minutes if you used the front pump kit as it just bolted on to a carrier in the front, and you parked under a tree, unbolted the pump, threw a line over a limb.. and put a jack stand ( included ) down under the now, and then pulled 2 pins and 1 more botl.. and the laoder was off.. cut wheels hard and back away in a spiral-ish pattern.
This laoder ( 711 / 722 ) was designed to fit the fords from 1939 thru 1964, and then they modified the attachment box ( and later retro'd the bracket set so either would work ).. and then the loader fit the 65-75 2000-4000 series including some of the fordsons.
Not sure why they never caught on. i've sene 1 arm designs on other tractors before..like a farmall cub.
My guess is people may have thought they were weak? All i can say is i lift more with my 1-arm job then lots of the tube frame loaders that were made for N front axle can lift.. They made a variety of attachments.. dirt bucket, snow bucket, maneur bucket with extra capacity dirt plate and maneur forks, as well as a front dozer blade.
Soundguy