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Old 07-31-2019, 06:51 AM   #1
marty in Ohio
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Default Crankshaft pulley question

I'm reading about the difference in a one piece pulley vs. a two piece pulley. The two piece can be removed without taking the radiator out? I assume the two piece can only be initially installed with the engine or the radiator out. Am I right? A friend is afraid his pulley is wobbling and we don't know which pulley he has. We have access to the "special wrench" but not sure there really is a problem. How can we tell which pulley we are looking at?
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Old 07-31-2019, 07:57 AM   #2
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Default Re: Crankshaft pulley question

If the big nut is tight, and pulley is still loose, it has to come off. If it is broken, it can wipe out both of your rope seals and that is a bigger job. Take off the nut and see what you have.
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Old 07-31-2019, 11:11 AM   #3
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Default Re: Crankshaft pulley question

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Originally Posted by Jacksonlll View Post
If the big nut is tight, and pulley is still loose, it has to come off. If it is broken, it can wipe out both of your rope seals and that is a bigger job. Take off the nut and see what you have.
That is good advice. If the pulley cannot be snugged up with the bolt then both need to be inspected. There were some bolts sold for a time that were too long on the threaded portion and could not be snugged up to the pulley. Tightening them further unfortunately caused the crankshaft snout to break, a very big problem.
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Old 07-31-2019, 04:48 PM   #4
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Default Re: Crankshaft pulley question

You should be able to see a line where the 2 pieces join if you clean it off. If it is a 2 piece.
As said,if loose remove it.

https://www.brattons.com/two-piece-c...ft-pulley.html

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Old 07-31-2019, 06:41 PM   #5
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Default Re: Crankshaft pulley question

Most two piece pulleys are done in a sort of square "dog-clutch" arrangement marrying the two parts. These are easy to spot both with and without the nut in place. (Maybe less easy to see if you have the 1-1/2" nut and not the 1-3/16")


Another variant in two piece exists in a "screwed together" version. I imagine this one is near to impossible to determine visually, and for all practical purposes for repair has to be treated as a "one-piece."


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Old 08-01-2019, 06:38 AM   #6
marty in Ohio
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Default Re: Crankshaft pulley question

Guys,
Thanks for the responses. We borrowed the "special wrench" last night and we're going to try to tighten things up this morning. I'll let you all know how things worked out.
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Old 08-01-2019, 07:43 AM   #7
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Default Re: Crankshaft pulley question

If you need to get the ratchet nut off. Jam teh wrench handle against the frame, ignition off, and then quick momentary energizing the starter to loosen the nut.
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Old 08-01-2019, 09:57 AM   #8
marty in Ohio
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Default Re: Crankshaft pulley question

Everything is tightened up and all's well.
Thanks for the help.
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Old 08-01-2019, 12:48 PM   #9
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Default Re: Crankshaft pulley question

With so many manufacturers making 2 piece units, tolerances have sometimes migrated. There is a shim to use under the nut to insure a complete clamping force on the pulley segments and the oil baffle and timing gear. check the catalogues or call.
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Old 08-01-2019, 04:38 PM   #10
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Default Re: Crankshaft pulley question

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With so many manufacturers making 2 piece units, tolerances have sometimes migrated. There is a shim to use under the nut to insure a complete clamping force on the pulley segments and the oil baffle and timing gear. check the catalogues or call.
Thatís what I was going to mention : the special washer/shim that the venders sell to make it work.
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Old 08-01-2019, 05:32 PM   #11
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Default Re: Crankshaft pulley question

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