shear pin for bush hog? needed?

[evofxdwg]

been doing minor maintenance to my "new" 1610D but about ready to
actually use it now. A friend was concerned that there appears to be
no shear pin anywhere in the "bush hog" PTO connections. The only
weak link i see is a standard bolt that pins the back side of the
drive shaft to the gear shaft on the bush hog. The drive shaft has a
full plastic cover so i didnt look in there. Do i have a shear pin
somewhere? Is the bolt soft enough to shear before damage to the PTO?
Do i need a special bolt or pin to prevent damage to the PTO?

 

[Inspector507]

The bolt could be a Grade 2 bolt. In that case it could serve as a shear pin. They are pretty soft. If you have doubt, get a slip clutch.

 

[normde2001]

That bolt is the shear pin. If it is a grade 2, (no marks), you are good to go.

 

[HoyeTractor]

That bolt WILL shear too! Had a customer recently engage the PTO instantly at full rpm. Sheared right off. It was a 1/2" bolt on a 20hp tractor. We had joked the week before that the tractor would never shear one of those. It did. Guess the designers knew what they were doing.

Aaron
Parts@HoyeTractor.com
(940) 438-0386

 

[evofxdwg]

OK thanks guys
The bolt has only a triangle stamped on it, no radial marks. According to internet reference i found, it is a grade 1 or 2 so im good to go.