I have a L5460 which a quick hitch is used to grab a RCR 1272 Brush Hog. It originally had the Grade 2 shear bolt. Problem is, unlike my now gone JD 1025R, the PTO isn't a soft engage. The brush hog has lots of inertia. Even at idle, I'd get a slam on engagement. Around ten times later, the shear bolt would be toast. BTW, much of the drive shaft shrouding creates unsafe conditions when trying to lube, replace a shear bolt, etc. So for around $208, a slip clutch was installed using Grade 5 shear bolts on each end. It's a two person job because of the unsafe shroud that severely limits access. My son made the difference. Now I still engage at idle, but there isn't the "slam". It's getting smoother as the clutch wears in a bit. Bottom line, makes life work again. Kubota instructions says Grade 8 and Grade 2 shear bolts, but the dealer said just use two Grade 5's and I'm good to go.