Pop off HM80 Tec flywheel - Snowblower Forum : Snow Blower Forums
 
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post #1 of 9 Old 12-20-2015, 04:21 PM Thread Starter
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Pop off HM80 Tec flywheel

I have been hitting the end of the shaft on a 8 hp tec engine to remove the flywheel.
I don't have the proper tool so have tried prying out and hitting with a 3/4" x 3" brass rod with a hammer . Using the brass to save the threads.

Maybe I should hit harder or I have small air hammer or do I need to use steel on steel to get a good solid impact.
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post #2 of 9 Old 12-20-2015, 04:32 PM
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This is how I do it:



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post #3 of 9 Old 12-20-2015, 04:47 PM
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No way would I hit the shaft that hard. Those magnets are glued onto the flywheel. I either use a puller or I apply pressure from the back side and then gently tap the flywheel. That's just too much force imho.
I'd rather buy a flywheel puller than try to find a different flywheel or repair the magnets.

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post #4 of 9 Old 12-20-2015, 05:19 PM Thread Starter
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Quote:
Originally Posted by micah68kj View Post
No way would I hit the shaft that hard. Those magnets are glued onto the flywheel. I either use a puller or I apply pressure from the back side and then gently tap the flywheel. That's just too much force imho.
I'd rather buy a flywheel puller than try to find a different flywheel or repair the magnets.
There is no way to use a puller on this specific type of flywheel and Tec repair manuals recommend against using a puller on the back of the rim. These are designed to pop off, however in the video the guy is hitting directly onto the end of the shaft and the nut which is not recommended as it might endanger the threads. These magnets may not be glued on?
I read on some of the older models there are provisions (threaded holes) and to use a puller- magnets are glued on.
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post #5 of 9 Old 12-20-2015, 05:26 PM
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I rethread the flywheel nut to just cover the shaft end, apply steady pressure to the back of the flywheel with a flat 16 inch prybar, and give a good, flush rap to the end of the nut with a 3 lb hand sledge. Off it comes, and the nut keeps the flywheel from grenading on the floor. MH

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post #6 of 9 Old 12-21-2015, 07:28 AM
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Quote:
Originally Posted by motorhead64 View Post
I rethread the flywheel nut to just cover the shaft end, apply steady pressure to the back of the flywheel with a flat 16 inch prybar, and give a good, flush rap to the end of the nut with a 3 lb hand sledge. Off it comes, and the nut keeps the flywheel from grenading on the floor. MH
i do it the same way. worst case a little heat around the center helps before the whack is applied...

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post #7 of 9 Old 12-21-2015, 09:36 AM
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the prybar and hammer method works every time for me, just apply a small amount of pressure with the prybar and thread the flywheel nut back on so no threads are exposed and give it a few good smacks until it pops
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post #8 of 9 Old 12-21-2015, 10:34 AM
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I wedge behind the flywheel with a couple of big screwdrivers or pry bars, thread the nut on a little past the end, and put a washer on the end so it's flush with the end of the shaft, then rap it with the hammer, works every time.
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post #9 of 9 Old 12-21-2015, 07:03 PM Thread Starter
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Thanks all... took three good raps
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