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Rotary Tech - General Rotary Engine related tech section.. Tech section for general Rotary Engine... This includes, building 12As, 13Bs, 20Bs, Renesis, etc...

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Old 05-06-2008, 10:07 AM   #1
BLKTOPTRVL
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Default Flywheel and EShaft Pulley N&B

I know this has been discussed on the other forum, but I also think we need to build up information here. Besides, I like telling my stories. So...

I could not get the Pulley Bolt, or the flywheel nut to budge.

So, As Ted and others suggested, I decided to set up my compressor (for the first time) and zip those suckers off fast and quick.

Setting up the compressor (8.6scfm @40 PSI, 6.4scfm @90 PSI, 150PSI max, 33 Gal Tank, 2HP running) was cake. My impact is only rated at 300 Ft Lbs. (Got the whole rig at Sears on sale for about $300)

Tried to remove the nut and bolt using the compressor. Zip. Nada. Wouldn't budge.

So, remembering some information gathered a long time ago, I applied heat around the Flywheel nut using a propane torch for about 3-4 minutes (too long?). Came right off.

The front pulley bolt was more stubborn, but after an additional three minutes or so, it also came off. I am guessing none.

I just wonder how much damage (if any) all that heat could have done.






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Old 05-06-2008, 12:13 PM   #2
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You are good. The thing to worry about is the possibility of cooking the front and rear main seals but you should be replacing them any way.
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Old 05-06-2008, 12:27 PM   #3
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Definitely replacing them, funny, the thing smoked for about 15 minutes after. Now I am off to go get a flywheel puller.
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Old 05-06-2008, 06:09 PM   #4
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Default Getting the Flywheel off.

Once again I went back to the old stories told...

Use a prybar and a soft mallet to remove the wheel. No dice.

Then I found RotaryReserection's write up on the subject...

http://www.rotaryresurrection.com/2n...el_remove.html

Two slight blows to the FW and it was off.

Thanks RR. I think his site should be compulsary reading.
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Old 10-28-2008, 04:51 PM   #5
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..just piss off your Sister and give her a hammer!..the parts fly off!..but seriously,I had my engine strapped on a pallet and I used a piece of chain on the Flywheel and attached it to a pressure plate bolt and the bolt that Holds the Trans to the Engine.With a 3 and 1/2 foot 3/4 drive breaker bar I got the 54mm Flywheel nut off.then while the Flywheel nut was Just Cracked(still on),I moved the assembly to tighten the other way,so I could get at the 19mm front pulley Nut.I put it on and had a Buddy steady it while I jumped on the Bar.It came right off..My total for a breaker bar and the Flywheel socket was 26 dollars CDN.(already had the 19mm Socket!.lol!)
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Old 10-31-2008, 06:59 AM   #6
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Or you can make a special tool from an old pressure plate assembly.
Barry

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Old 11-07-2008, 06:29 AM   #7
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^Some powdercoat and your ready to start a group buy.

This has been the best $90 I ever spent considering the trouble it's saved. http://www.harborfreight.com/cpi/cta...temnumber=2623
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