Rear Wheel Rim Bolt Torque

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Clownfish
Cub Star!!
Cub Star!!
Posts: 324
Joined: Sat Dec 07, 2013 12:36 pm
Zip Code: 36578
Tractors Owned: 49 Farmall Cub
1959 Farmall Cub
2005 Massey Ferguson 1528
Circle of Safety: Y
Location: AL, Stapleton

Rear Wheel Rim Bolt Torque

Postby Clownfish » Fri Dec 18, 2015 11:19 am

I have replaced the rear wheel rim bolts with Grade 5 x1/2" fine thread sq head bolts from John Deere. The original bolts were the IH Dot head bolts which I understand are Grade 1 or 2. What should I torque the new bolts to? I know that the new grade 5 bolts will take much more torque than the old bolts but I don't want to damage the brackets (clamps) on the rim by tightening the bolts too much. Since the old bolts held for 65 years, would that value be ok for the new bolts? I have not been able to find a recommended torque value for the wheel to rim bolts.

1-DSC_0363.JPG
Original Dot Head Bolt

User avatar
Don McCombs
Team Cub Mentor
Team Cub Mentor
Posts: 12822
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: Rear Wheel Rim Bolt Torque

Postby Don McCombs » Fri Dec 18, 2015 11:49 am

Don McCombs
MD, Deep Creek Lake

Image
Proud Member of Maryland Chapter 39

Clownfish
Cub Star!!
Cub Star!!
Posts: 324
Joined: Sat Dec 07, 2013 12:36 pm
Zip Code: 36578
Tractors Owned: 49 Farmall Cub
1959 Farmall Cub
2005 Massey Ferguson 1528
Circle of Safety: Y
Location: AL, Stapleton

Re: Rear Wheel Rim Bolt Torque

Postby Clownfish » Fri Dec 18, 2015 12:58 pm

I understand the torque that the grade 5 bolt will take but my concern is the bracket/ clamp on the rim. Since the original bolt would have had only torque suitable for a Dot Head (Grade 1 bolt) will the extra torque for a grade 5 bolt damage the bracket/clamp? If I tighten the bolt too much and break the bracket on the rim I will have a problem trying to replace this bracket. I always thought that the proper torque had to consider both the bolt and what it was being connected to.

Bob McCarty
Team Cub
Team Cub
Posts: 8314
Joined: Tue May 25, 2004 8:02 pm
Zip Code: 80501
Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
Circle of Safety: Y
Location: CO, Longmont

Re: Rear Wheel Rim Bolt Torque

Postby Bob McCarty » Fri Dec 18, 2015 1:29 pm

Glenn, I would think that if you torque to the Grade 2 spec in the chart you'll be good. The bolts will have a 50% safety factor which shouldn't be needed.

Bob
"We don't need to think more,
we need to think differently."
-Albert Einstein

Clownfish
Cub Star!!
Cub Star!!
Posts: 324
Joined: Sat Dec 07, 2013 12:36 pm
Zip Code: 36578
Tractors Owned: 49 Farmall Cub
1959 Farmall Cub
2005 Massey Ferguson 1528
Circle of Safety: Y
Location: AL, Stapleton

Re: Rear Wheel Rim Bolt Torque

Postby Clownfish » Mon Dec 21, 2015 10:20 am

OK. I'll go with the Grade 2 fine thread at 41 lb-ft.


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: BJM68 and 4 guests