Shear Pin Shocker

[mwood]

This seems to be a case where proprietary setups cost everyone more in the long run. Why can't they standardize a system for something as simple as shear pins?

By the way, I have seen this setup on many applications where they not only hit you for $ at the beginning, but every time something as simple as a shear pin snaps, they gouge you again! Very agrivating....

 

[Hoeman00]

Why not drill it out to 3/8 and use 3/8 all-thread, this has a minor diameter of 5/16 which would be a little easier to shear.
Bolt houses sell 3,6,12' lengths and 6' is than 1 shear pin.

 

[Henro]

<font color="blue"> Henro.. I was wondering.. w/ the slipclutch.. how many shearbolts have you gone through? </font>

Maybe someone with more holes under thier beit and a slip clutch on thier post hole digger can chime in here. I don't have enough holes dug to really know how well the slip clutch actually works. I got it because my neighbor recommended that I get one.

Only dug about ten or twelve holes with mine so far...

Anyone out there have some real experience with a slip clutch on a phd? Worth it? I guess it is but ... but that is just opinion really. We some experience to do the talking /forums/images/graemlins/smile.gif

 

[gerard]

i have a low end phd but I can use cheap grade two bolts with lock nuts, Takes about 30 seconds to swap when they shear and they cost around 30 cents each. If I had to pay $8 I'd have one hell of a lot of $50 post holes!!!!!! I wouldn't even think twice about getting a slip clutch. You can get them for about $100 and at $8 each it'll pay for itself pretty quickly, especially if you have rocky ground. I just did 5 holes for an addition on my land. Took me 5 hours and handdigging. Did 8 holes for a friend and it took about 25 minutes for all of them. He didn't have a rock bigger than an apple on his land!! My luck I have a rock farm.................

 

[kemartin3]

An update with a little more information. As I had said earlier, my PHD2101 came with a 3/8" grade-5 bolt in the shear bolt hole. I verified with the dealer that the person setting it up had not drilled out one side of the yoke. So I sent a note to Bush Hog via their web site. I got a call from BH tech support in Selma, AL the next day. Henry, the BH rep, was very helpful. He confirmed what Jerry has been saying: the PTO shaft supplied won't stand up to the double shear (both sides in shear at once) of a full 3/8" bolt, even grade-2. That is the reason for the stepped pin. The PTO shaft is a model T10 (Comer brand I believe, as least the manual that came with the unit that discussed the PTO shaft was from Comer, who supplies the gearbox). He told me to have my dealer order a replacement shaft assy and send the warranty claim to his attention. He suspects that the supplier had put the wrong/bad yoke on mine. Excellent customer support.

As an aside, I've used my 2101 with an 18" auger (BH only specs the 2101 for up to a 9" auger) to drill nine 48" deep holes. Granted the dirt was soft and I didn't hit very many rocks, but I have not sheared any of the stepped shear pins.

Hope this helps,
Kevin