Recent Topics
The SR-71 Sistership
by chiefsfan1
53 minutes 20 seconds ago
Oil recommendation for 2007 Lexus IS250
by antik
Today at 02:33 AM
Summer time idling with a/c on?
by zach1900
Today at 12:41 AM
Does Toyota make the best automotive a/c?
by zach1900
Today at 12:34 AM
how to handle a poor product and poor service
by ram_man
Today at 12:27 AM
OT: Swedish snowmobile rafting. up stream!
by lars11
Today at 12:23 AM
Bermuda Triangle
by friendly_jacek
Yesterday at 11:56 PM
Where to buy TES-295 trans fluid....cheap
by Joe_Power
Yesterday at 11:56 PM
Best file transfering software
by Joe_Power
Yesterday at 11:44 PM
Thoughts on Mobil Super HM Synthetic Blend 10w30..
by gregk24
Yesterday at 10:33 PM
Fatal stand-off at local Walmart
by OVERKILL
Yesterday at 10:18 PM
Lenovo X230: dead fan?
by Quattro Pete
Yesterday at 10:17 PM
Newest Members
antik, JoeSubaru, sjr, Nicholi2789, cycleguy55
53353 Registered Users
Who's Online
24 registered (Char Baby, Boomer, 01_celica_gt, Death_Eagle_571, Grace_Jones, 4 invisible), 533 Guests and 199 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
53353 Members
66 Forums
228832 Topics
3656800 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#1683467 - 11/24/09 05:28 PM What Grade Bolt For A Bush Hog "Shear Pin"?
pharmer Offline


Registered: 03/03/03
Posts: 68
Loc: NW Tn.
I have an older Bush Hog rotary mower that doesn't have a clutch. Ran over a stump today & it sheared the PTO pin that goes into the Bush Hog gear box. Did what it was designed to do. Can't find a factory pin as my mower is over 30 yrs. old. Bush Hog dealer tells me to use a 3 inch long, three-eighths diameter bolt with a lock-nut. One dealer says to use a Grade 2 bolt, other dealer says to use a Grade 5 bolt. I don't want to damage my tractor's PTO so I'm inclined to go with the weaker Grade 2 Bolt. Any suggestions or advice? Thanx!

Top
#1683484 - 11/24/09 05:41 PM Re: What Grade Bolt For A Bush Hog "Shear Pin"? [Re: pharmer]
MGregoir Offline


Registered: 08/30/07
Posts: 1784
Loc: Bonnyville, AB
I would go with a grade 2. I think they each said a grade in reference to not being grade 8 more than anything.

Top
#1683549 - 11/24/09 06:26 PM Re: What Grade Bolt For A Bush Hog "Shear Pin"? [Re: MGregoir]
HM12460 Offline


Registered: 05/26/07
Posts: 1561
Loc: West Michigan
grade 2 bolts are generally accepted to be the norm for shear pins.
_________________________
2003 Dodge Dakota
1997 Mercury Cougar

Top
#1683555 - 11/24/09 06:30 PM Re: What Grade Bolt For A Bush Hog "Shear Pin"? [Re: HM12460]
pharmer Offline


Registered: 03/03/03
Posts: 68
Loc: NW Tn.
MGregoir & HM12460, Thanks to both of you for your quick responses. I definitely will be buying Grade 2 bolts to use as "shear pins". Thanks again.

Top
#1683580 - 11/24/09 06:42 PM Re: What Grade Bolt For A Bush Hog "Shear Pin"? [Re: pharmer]
wwillson Offline

Administrator


Registered: 08/20/03
Posts: 1566
Loc: Naperville, IL
+1 on the grade 2. I grew up chopping about everything you could think of with Bush Hog mowers - brush, corn stalks, gopher mounds, etc. The mowers are much tougher than the PTO of the tractor, especially if it's a 540rpm. You want the weakest link to be that shear bolt. I'll bet the grade 2 will be in there for years, or until you hit your next stump.

Fastener strength table

Wayne


Edited by wwillson (11/24/09 06:49 PM)
Edit Reason: added link to table

Top