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Tractor Talk Discussion Forum

flywheel cracks?

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03-11-2008 17:14:23

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I cleaned up and sandblasted the flywheel tonight and was going to put on a new ring gear. After getting it cleaned up I noticed all these little stress cracks in it. Some might come out but I donít think they can all be removed by resurfacing. Does this mean Iím now looking for a new flywheel too? What caused these? Excess heat from slippage?
Opinions appreciated!

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03-12-2008 16:14:16

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
Hello Tim Wafer.
The flywheel needs to be machined. If the are only surface cracked then it will come out good as new.
Before the shop grinds it they will tell you if all of the cracks will come out.
Any cracks extending on the inside toward the pilot bearing would make it unuseable.
The machine shop should be able to tell you, If the machine shop does not give you a straight answer you need to look for anothe one.
The rest of the work looks very good, don't skimp on the flywheel.

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03-12-2008 05:32:10

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
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Thanks guys! This is good news; I didnít really want to have to look for a new one. I'll have well over a grand in the engine before Iím done now! I guess I forgot to mention itís off my H. Iím still waiting to get the crank & head back from the machine shop. Supposedly gonna be done this week so when I pick those up Ill drop off the flywheel. I need to update my web page with what little progress Iíve made lately. Mostly just cleaning, sandblasting and priming lots of parts. Anything that will fit into the cabinet. The bigger parts have to wait for warmer weather so I can sandblast outside. I do have the block done so can begin assembly of the engine as soon as I get the parts back from the machine shop.

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03-11-2008 20:23:11

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
Wel it was working wasn't it????? Well the old saying if it isn't broke don't fix it comes to mind. So it it has been working off I would run it till it really go bad. Common on a lot of tractors but it does help to tell use what your working on

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03-11-2008 19:04:16

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
If it WASN"T cracked,I'd say that's odd.

Grind 'er down.

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Steven f/AZ

03-11-2008 17:48:37

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
Looks like pretty much every flywheel I've ever pulled. Won't hurt it a bit.

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Allan In NE

03-11-2008 17:18:52

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
Get it turned. A good stone will clean that right up.

Almost all used flywheels look like that when ya pull 'em down. Stress cracks are caused by heat/pressure.


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03-11-2008 17:16:46

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 Re: flywheel cracks? in reply to TimWafer, 03-11-2008 17:14:23  
Very typical on the AC WC, WD, etc. Nothing to worry about.

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