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pilot bushing rear of crankshaft

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pett3227b
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pilot bushing rear of crankshaft

Postby pett3227b » Mon Jun 06, 2022 8:34 am

Okay working on my 47' cub. I was told in a different thread that If I had replaced the pilot bushing at the rear of the crankshaft that I should measure the ID of the bushing. I want to make clear which part is being metioned. Is it also called the throwout bearing? want to make sure which part I am working on. What should the ID be? I have a pair of dial calipers. Thank you

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Bob McCarty
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Re: pilot bushing rear of crankshaft

Postby Bob McCarty » Mon Jun 06, 2022 8:48 am

The pilot bushing is a bronze bushing about 3/4" in diameter that is in the end of the crankshaft. The throw out bearing engages/disengages the pressure plate when you depress the clutch. It's about 4" across, a black casting that has the graphite insert in it. If you click on TM Tractor at the bottom of the page, then click on new parts, and clutch, you'll see pictures of both.
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pett3227b
5+ Years
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Posts: 116
Joined: Tue Nov 27, 2018 7:28 am
Zip Code: 28327

Re: pilot bushing rear of crankshaft

Postby pett3227b » Mon Jun 06, 2022 12:41 pm

Okay I'm glad that you told me about the bushing in the rear of the crankshaft. No I have not removed it from the old crankshaft. Does anyone know the spec for the Internal Diameter? That way I will know whether or not to order a new one or have my machinist to pull the old one.Thank-you

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ricky racer
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Re: pilot bushing rear of crankshaft

Postby ricky racer » Mon Jun 06, 2022 1:40 pm

I don't know the ID but if you can measure the shaft OD that goes into it, the bushing should be about. 003"-.005" larger.
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Re: pilot bushing rear of crankshaft

Postby SamsFarm » Mon Jun 06, 2022 3:35 pm

The specs should be in the cub service manual.

If you dont have one, there is one in the pdf manuals section here at farmallcub.com
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