howard rotavator J -3point attach

farmerkath · May 26, 2015

I have an old Howard Rotavator J which attaches to a little Kubota tractor. The shear bolt keeps shearing when I'm trying to till...any suggestions? I'm greasing it and replacing the bolt with a #2 3/8ths inch but so far, it doesn't last long.

old · May 26, 2015

Are you using the run of the mill bolts?? If you are you may need to go with grade 5 or grade 8 bolts since the common run of the mill bolts are real soft

farmerkath · May 26, 2015

Yes, I am running it with those soft bolts, so you think #5 bolts wouldn't hurt?

showcrop · May 26, 2015

According to Howard the shear bolt should be #2. Use of 5 or 8 could cause damage to either the tiller or the tractor.

old · May 26, 2015

I would get a few grade 5 and a few grade 8 bolts an try the first and if that does not hold up try to 2nd choice. I use a grade 8 bolt on my brush hog and it shears them from time to time

farmerkath · May 26, 2015

THANK YOU! I used a harder bolt this afternoon and I'm back in business!!

showcrop · May 27, 2015

Farmerkath, are you getting the bolts good and tight? part of the resistance to shearing is the friction between the surfaces that the bolt an nut holds together.

howard rotavator J -3point attach

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