I pull a 630 pound/60" "Bush Hog" (made in India) Rollover Box Blade behind my Kubota B3300SU. (( 33-hp/1,800 lbs., industrial tires )) No drama going forward with either the rippers or scraping/pulling dirt. However, when I bulldoze in reverse I get nervous about the potential to
bend the lift arms, which of course are engineered to PULL, not push. I ordered rigid, pin adjustable "check chains" from Stabilworks in hope that this reinforcement will relieve my apprehension.
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I do not know about stress on Rollover Box Blades Vs. "normal" box blades but be sensitive to the POTENTIAL for stressing your lift arms operating in reverse with a heavy box blade.