Recent Topics
2014 WSBK Laguna Seca Photo Show...
by BusyLittleShop
07/22/14 01:50 AM
What Cologne Do You Wear?
by Cooper
07/22/14 01:38 AM
Wix filter manufacturing changes ?
by CELICA_XX
07/22/14 01:07 AM
Valvoline Conv. 5 qts 10W30 $14.39 Amazon
by Warstud
07/22/14 12:06 AM
1997 Audi A4 Quatro engine oil recomendations
by Nevets91
07/21/14 11:44 PM
Men's Body Spray
by MolaKule
07/21/14 11:07 PM
Real mechanics don't use Walmart oil filters
by SilverC6
07/21/14 10:12 PM
Canceled my Chase card (fraud alert)
by gathermewool
07/21/14 09:58 PM
Cause of Purolator Media Tears
by slalom44
07/21/14 09:49 PM
Denso Filters
by Clubber_Lang
07/21/14 09:44 PM
Coolant color has changed to light brown
by DarylZero
07/21/14 09:32 PM
Dumping Used Oil Question......
by qwerty1234
07/21/14 09:16 PM
Newest Members
Moral, momay, MatBo911, platypus20, rcube
50704 Registered Users
Who's Online
21 registered (FastGame, Clubber_Lang, exxr, chrisri, coach477, 97prizm, 2 invisible), 686 Guests and 214 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
50704 Members
64 Forums
216617 Topics
3408635 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: 1448
Loc: West Michigan
grade 2 bolts are generally accepted to be the norm for shear pins.
_________________________
2003 Dodge Dakota
"Hot Rod Dodge"

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: 1533
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