What Keeps The Cranckshaft pulley on a '47 Farmall Cub

KCTractors · Feb 1, 2014

Have a guy over-hauling the engine on a Cub and he asked what keeps the crank-shaft pulley on the crank, he said there was no nut or anything on it. I looked at him kind of dumb, and said, the heck if I know. So what does keep it on?

screwstick · Feb 1, 2014

Its a press fit, kept aligned with a keyway. The entire back of the pulley must be supported before you attempt to pull it off or it will break.
[b:8aac9e6b04]http://www.farmallcub.com/phpBB2/viewtopic.php?f=141&t=34545[/b:8aac9e6b04]

old · Feb 1, 2014

Simple press fit as in almost to the pint of forcing it on. One has to be careful when puling them off or you buy a new pulley

Denny ('60 Lo-Boy) · Feb 2, 2014

(quoted from post at 23:56:17 02/01/14) Have a guy over-hauling the engine on a Cub and he asked what keeps the crank-shaft pulley on the crank, he said there was no nut or anything on it. I looked at him kind of dumb, and said, the heck if I know. So what does keep it on?

If he has to ask, he might not be the one you want to have overhauling it. :roll:

JDnTN · Feb 2, 2014

When finished, do you put it back on with a big hammer?

screwstick · Feb 2, 2014

"When finished, do you put it back on with a big hammer?"

You can if you want to damage the main bearings...

To reinstall properly, the end of the crank is threaded with 1/2-20 threads. Install a good length threaded rod and line up the pulley with the keyway. Use a plate with a hole for the threaded rod and pull the pulley on with a nut. Use anti-sieze on the crank and the threaded rod, along with a couple grease covered washers behind the nut to act as a thrust bearing. Some people heat the pulley up before installation, but its not necessary.

What Keeps The Cranckshaft pulley on a '47 Farmall Cub

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