Welcome! Please use the navigational links to explore our website.
Company Logo (800) 853-2651 Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Case Tractors Discussion Forum
:

How to torque head bolts G148B (480B)

Welcome Guest, Log in or Register
Author  [Modern View]
RC BROOKS

10-27-2013 19:54:37




Report to Moderator

I've got a 480B with the gas motor. I haven't pulled this motor apart before. How do you torque the distributor side head bolts that sit under the top lip of the head? A very cumbersome setup to say the least. I'd rather not use a u-joint as it can do funny stuff to torque settings.

Thanks for any advice!

-RC




[Log in to Reply]   [No Email]
Joe (Wa)

10-28-2013 11:29:49




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to RC BROOKS, 10-27-2013 19:54:37  
third party image

This is George Md"s pic from the archives.

Joe



[Log in to Reply]  [No Email]
Joe (Wa)

10-27-2013 20:53:26




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to RC BROOKS, 10-27-2013 19:54:37  
third party image

The original tool was an offset extension (pic). Note that the offset on both ends is the same length so there is no leverage to screw up the torque as would be the case using a universal.

This extension fits the G148 engine (and others) that was superseded by the G148B, 1/2" drive x 11/16" box end. Snap-on p/n S8663B, I don"t think they are available anymore from Snap-on.

George Md posted a pic of some torque extensions made up of welded wrench pieces awhile back that would work just fine. The key is to get the offset on both ends the same length for an accurate torque.

Joe

[Log in to Reply]  [No Email]
Alan K

10-28-2013 07:09:20




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to Joe (Wa), 10-27-2013 20:53:26  
Im looking for that style wrench for the MM heads in 15/16" size....



[Log in to Reply]  [No Email]
RC Brooks

10-28-2013 13:19:15




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to Alan K, 10-28-2013 07:09:20  
Just as a piece of information to add here, I did discover that if while using a crows foot, you keep the wrench at a 90 degree angle to the crows foot you will not need to compensate. I should have realized that, but still... I may try to fab one up. It"ll be a few days before the new gasket comes in anyhow.



[Log in to Reply]  [No Email]
Joe (Wa)

10-28-2013 18:07:43




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to RC Brooks, 10-28-2013 13:19:15  
RC, that is not true. The distance from the center of the crowsfoot square drive to the center of the fastener is lateral leverage and must be compensated with an equal distance offset at the center of the drive on the torque wrench.

On a vertical fastener the center of the torque wrench drive must be perfectly perpendicular to the center of the fastener for accurate torque.

If you want to use the crowsfoot w/o an equal offset you need to calculate the leverage. There are several sites that have basic calculations for that, do a goggle search.

Joe

[Log in to Reply]  [No Email]
RC BROOKS

10-28-2013 20:03:15




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to Joe (Wa), 10-28-2013 18:07:43  
Yes, now maybe I read wrong, but what many of those sites said was that by turning it 90 degrees (making an L out of the crows foot), you are keeping "L" (Lever Arm) the same for purposes of torque calculation. So rather than adding "x" number of inches to the lever arm, by turning it 90 degrees, you're adding 0 inches to the centerline of the lever arm.

But, I could be misreading/misunderstanding and quite possible that the sites could be mistaken.

[Log in to Reply]  [No Email]
Joe (Wa)

10-28-2013 22:13:23




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to RC BROOKS, 10-28-2013 20:03:15  
Ok RC, I am going to have to eat some crow on having the crowfoot at 90 degs.

Here is a site that proves you are right by using the calculator.

I am old but I can still learn if you beat on my head hard enough.

Joe



[Log in to Reply]  [No Email]
RC Brooks

10-29-2013 05:45:19




Report to Moderator
 Re: How to torque head bolts G148B (480B) in reply to Joe (Wa), 10-28-2013 22:13:23  
OK, well I value experience more than I do websites. The physics of it I understand, but there are always things I may leave out, so I appreciate corrections as needed.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Today's Featured Article - Product Review: Lead Substitutes - by Mike Schordine. Lead was oriinally added to gasoline as an upper cylinder lubricant. It lubes the valves and seats. If you rebuild the motor, you could use hardened seats and valves, and unleaded fuel. But if your old tractor runs good, a simple lead substitute added to the gas is a perfectly reasonable solution. And, if you are like me, your tractor is under cover, but it sits outside. So with every temperature change, the humidity in the air collects in the fuel tank, in the form of water. ... [Read Article]

Latest Ad: 2 early 1950s Dodge Pickup Trucks flathead 6 engines 4 speed stepside boxes havnt run in 35 yrs Good restoration prospects or parts Price 600 each can hold till late fall for buyer. calls only [More Ads]

Copyright © 1997-2022 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy