Can't get the darn blade off - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
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post #1 of 15 (permalink) Old 09-24-2020, 09:45 AM Thread Starter
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Can't get the darn blade off

Blade is spun 1/8 turn as shown in first picture. My wrench/pipe came off it and I cut myself. That's when I decided to take it home to my own shop and try to fix it. I'm now determined to win this one. I've got blood in it.

At home we tried two things. First we put a wood block under the blade, heated up the bolt with my mini torch, but spun the box end wrench on the nut. Now we've got a problem. What we really needed was a wrench with 6 points instead of 12. They have 'em. I don't. Too late now. Well, maybe it isn't, but we've moved on.

Next we tried to weld a square piece of metal to the bolt and get on it with a pipe wrench. We ran out of welding rod and didn't have enough of a weld to hold it. Getting more welding rod next...

Other ideas?
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post #2 of 15 (permalink) Old 09-24-2020, 10:01 AM Thread Starter
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Looked and found my sockets all have 6 points. Will have to grind some of that weld away and try again. Now where is that breaker bar?

Last edited by Joe Kuhn; 09-24-2020 at 11:00 AM.
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post #3 of 15 (permalink) Old 09-24-2020, 12:05 PM
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got one of these laying around?

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post #4 of 15 (permalink) Old 09-24-2020, 01:17 PM Thread Starter
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I don't, but I got a longer pipe and it still won't come loose. I found my sockets for stripped bolt heads and hammered the 9/16" one on after grinding some of the weld away, but all my weight (165 lbs.) won't do it. Will ask son to try. He's quite a bit bigger at 215+.

I suppose I could just grid the whole head off it.
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post #5 of 15 (permalink) Old 09-24-2020, 02:24 PM
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It looks like the blade holder is rotated and is sitting off kilter to the blade adapter. Could you hold the adapter with a pipe wrench and hit the blade counter clockwise to release some of the pressure on the adapter and/or bolt ?

Experience is something you don't get until just after you need it.
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post #6 of 15 (permalink) Old 09-24-2020, 03:14 PM Thread Starter
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It looks like the blade holder is rotated and is sitting off kilter to the blade adapter. Could you hold the adapter with a pipe wrench and hit the blade counter clockwise to release some of the pressure on the adapter and/or bolt ?
I was able to move that bolt holder around almost back to normal, but it moved right back again when I got on it with my bolt extractor socket & breaker bar.

Tried some new welding rod as well, buy my son's little cheapo welder still isn't laying down solid bead. Spun the makeshift bolt extension off with his weight right away.

Don't have a cutting torch and my son says that'd make everything so hot the oil seal and bolt thread might get wrecked.

Will think about it for a while. At least we were able to move something.

I could just sharpen the blade from the bottom and call it done.

Last edited by Joe Kuhn; 09-24-2020 at 03:33 PM.
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post #7 of 15 (permalink) Old 09-24-2020, 04:01 PM
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how hot did you heat it up, try getting almost cherry red, then quinch it with water.

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post #8 of 15 (permalink) Old 09-24-2020, 04:53 PM Thread Starter
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how hot did you heat it up, try getting almost cherry red, then quinch it with water.
Not cherry red. Ok, another thing to try. Thanks.
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post #9 of 15 (permalink) Old 09-25-2020, 01:14 AM
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If your past the point of getting a socket to hold and taking it to an auto shop for them to put an impact wrench on it, about only thing left is to cut the head off and hope a pair of vise gripes holds well enough to get the shaft unscrewed. Sounds like the force that broke it might have sort of cross threaded it in the crank or maybe never been off and rust has made its way into the threads.
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post #10 of 15 (permalink) Old 09-25-2020, 03:35 AM
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Grind the head off
It is toast now in any case
Usually bolts will come out with nothing more than fingers once the clamping force provided by the head is relieved .
A problem I regularly come across with owners who never sharpen their blades .
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