Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Farmall & IHC Tractors Discussion Forum
:

torque to spin crank with new bearings question

Welcome Guest, Log in or Register
Author 
riverbend

03-21-2008 11:33:06




Report to Moderator

I'm putting new bearings in my Super C. When I try to turn the crank, it seems really tight at first and then get easy once it starts to move. It takes 30-35 foot pounds of torque to get the crank to start to turn and then it drops to around 10 ft.lb. or less.

Anybody know if this is typical ?

Anybody know how much torque it should take to turn the crank when the rods, pistons and rings are installed ?

Thanks

Greg

[Log in to Reply]   [No Email]
El Toro

03-21-2008 14:33:14




Report to Moderator
 Re: torque to spin crank with new bearings question in reply to riverbend, 03-21-2008 11:33:06  
If you had your local machine shop to measure your crankshaft and they furnished all the bearings you're probably good to go. Squirt some more engine oil into the cylinders and crank her over with the starter until you see oil pressure on the gauge & then start her up. Hal



[Log in to Reply]  [No Email]
Roger46

03-21-2008 14:23:15




Report to Moderator
 Re: torque to spin crank with new bearings question in reply to riverbend, 03-21-2008 11:33:06  
Did you check the bearing clearances when you put it together. I always use Plastigage to make sure I have the correct running clearance. It is a little more effort; because you have to torque the bearings down an extra time with the Plastigage in between. Have you ever used Plastigage? You can buy at any auto parts store. Roger



[Log in to Reply]  [No Email]
ihc49er#2

03-21-2008 12:57:17




Report to Moderator
 Re: torque to spin crank with new bearings question in reply to riverbend, 03-21-2008 11:33:06  
feels good to me.initial torque to get it turning will be higher.



[Log in to Reply]  [No Email]
Bob

03-21-2008 12:16:28




Report to Moderator
 Re: torque to spin crank with new bearings question in reply to riverbend, 03-21-2008 11:33:06  
It sounds like you have the pistons installed, so it's PROBABLY normal. Are the bores well-oiled?

The crank, itself, should almost SPIN freely in the main bearings.

Does the crankshaft have a little endplay, and can you slip the indiviaual rods back and forth a little on the crank throws, in other words, they are NOT binding?



[Log in to Reply]  [No Email]
riverbend

03-21-2008 17:36:38




Report to Moderator
 Re: torque to spin crank with new bearings question in reply to Bob, 03-21-2008 12:16:28  
I did not have the pistons installed, and found that the front main cap had a bright spot on the bearing. The plastigage had said it was okay the first time.

Re-cleaning the cap with a scotchbrite pad and rechecking gave 0.0015 for clearance. After oiling it and putting it together, it turned much better. Now (with pistons installed) it takes about 40 ft.lb. to get it started and 20 or less to keep it going.

Thanks guys

Greg

[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


Copyright © 1997-2023 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