Newbie question on cranks

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.
10+ Years
10+ Years
Posts: 29
Joined: Mon Oct 20, 2003 10:19 am
Location: Durham, NC

Newbie question on cranks

Postby Ramon » Sun Nov 14, 2004 10:14 am

Sorry for the newbie question but what exactly do you grind on the crankshaft and does it somehow increase performance (e.g. hp) or is it just to have a smoother running machine?

User avatar
Cub Pro
Cub Pro
Posts: 24141
Joined: Sun Feb 02, 2003 12:50 pm
Zip Code: 43113
Circle of Safety: Y
Location: OH, Circleville

Postby Bigdog » Sun Nov 14, 2004 10:43 am

Ramon - the surfaces where the crankshaft rests in the bearings will wear and develop grooves after years of running. Those surfaces are re-ground to a smooth surface and specific smaller diameters so that new undersized bearings can be used. Good oil pressure is dependent partially on the tightness of the fit of the internal components of the engine. As the components wear, oil pressure drops which reduces the effectiveness of the lubricating system. That reduced effectiveness will increase the rate of wear so it is a viscious cycle. Grinding the bearing surfaces of the crank and installing undersized bearings is an alternative to buying a new crankshaft and bearings which would be prohibitively expensive.
If you can't fix it with a hammer, you've got an electrical problem.

My wife says I don't listen to her. - - - - - - - - Or something like that!


  • Similar Topics
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: FCub S. E. Tn, Johnbrcht, rockfarmer and 7 guests