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Garden Tractors Discussion Forum

Best way to fix crankshaft journal - Briggs

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9NJoe

09-25-2007 17:10:18




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Had my briggs 13 horse seize up on me due to oil leak. Checked it out and only problem is conn rod to crank journal is galled. I plan on getting a new conn rod but what is the best way to clean up the crank? I could hit it with crocus cloth but is there a way to dissolve the aluminum without harming the steel? Someone told me about soaking a rag in muriatic acid and laying it on the journal for a short time. Any tricks to this?

Joe

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chuck in Indiana

09-26-2007 13:23:46




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 Re: Best way to fix crankshaft journal - Briggs in reply to 9NJoe, 09-25-2007 17:10:18  
soak the crank in bleach over night.This will get the metal off.It will dis color the crank but is ok.Than polish.



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Kentb of SWMO

09-26-2007 06:27:59




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 Re: Best way to fix crankshaft journal - Briggs in reply to 9NJoe, 09-25-2007 17:10:18  
Tuen crank pin .020 inch undersize and order a under size rod from B&S dealer.

Kent



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El Toro

09-25-2007 18:13:44




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 Re: Best way to fix crankshaft journal - Briggs in reply to 9NJoe, 09-25-2007 17:10:18  
I would have your auto machine shop to examine that crankshaft. It may need to be ground undersize. I would find out before having it ground if undersize rods are available. I had this done an old B&S 23B. Hal



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Tom Arnold

09-25-2007 17:51:00




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 Re: Best way to fix crankshaft journal - Briggs in reply to 9NJoe, 09-25-2007 17:10:18  
I just went through this with a 12 hp I/C that snapped a rod apart at the cap.

Took the crank to a crank rebuilder. He stuck it in his tank overnight to remove all the galled aluminum and then polished the journal. Cost me $30.00 to get a crank back from a specialist who assured me that it was now ready to be put back into service without a worry.

Cheap insurance that the engine isn't going to grenade anytime soon

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