This is the article clip that I am referring to.
Sicklebar Mowers
Rough cuts made easy. Double-action cutting bar makes quick work of
ditches, hay fields and varying terrain. These Category 1 hitch-compatible
mowers include hydraulic-lift cylinders for the cutting bar.
69-in. cutting width 25-50 hp SB3106
3320, 3520, 3720, 3032E, 3038E,
4005, 4105, 4120, 4320, 4520, 4720,
4044M/R
81-in. cutting width 25-50 hp SB3107
3320, 3520, 3720, 3032E, 3038E,
4005, 4105, 4120, 4320, 4520, 472,
4044M/R
92.5-in. cutting width 25-50 hp SB3108
3320, 3520, 3720, 3032E, 3038E,
4005, 4105, 4120, 4320, 4520, 4720,
4044M/R
The models 3033R, 3039R, 3046R are not in the list. The only 'R' tractor in the list is the 4044R. I was wondering if there was so kind of reason their not in the list, or if they still work on the other 'R' tractor just not listed.