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Old 28-07-2017, 09:43   #91
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Re: What is the Name of the Tool to Remove this Nut?

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Originally Posted by Hillbilly View Post
Are you sure the so-called nut is not really a part of the pulley itself? Have you tried to turn the pulley instead? Even if they are separate, that might give the nut some encouragement.


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Old 28-07-2017, 15:36   #92
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Re: What is the Name of the Tool to Remove this Nut?

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IT'S APART

The special custom tool required turned out to be a combination of a bench vice, a 24" Stilson, a 15" Crescent, a 18" Crescent, 4' of water pipe and some chain and turnbuckle.

Job held in the vice, the Stilson was used to hold the pulley and shaft. The chain and turnbuckle kept the Stilison from moving. One Crescent to grip the nut and the other to turn the first Crescent with extra leverage supplied by the water pipe.

Took a surprising amount effort to get it to turn.
Here you go, Hillbilly, here's how he got that odd nut off.

Name for the tools? Tom, Dick, and Harry???

Good on ya, Wottie,

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Old 28-07-2017, 15:55   #93
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Re: What is the Name of the Tool to Remove this Nut?

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Originally Posted by meatservo View Post
Worst case, use a dremel... I can cut that off in about 20 minutes. Once cut in half, use a chisel and hammer. Replace with a grade 8 regular nut.


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+1

Proprietary hardware like this is a PITA.
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Old 28-07-2017, 17:03   #94
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Re: What is the Name of the Tool to Remove this Nut?

Wotti. good to see that the offending nut finally saw the light. As to the name, the nut is short therefore I would call it Bill.
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Old 29-07-2017, 19:35   #95
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Re: What is the Name of the Tool to Remove this Nut?

I've had a few similar situations. On some of those, I was able to straddle the nut from a top on direction, i.e. the open end of a wrench or crescent sticking upwardly and in line with the shaft. Then, apply the torque with a second wrench twisting perpendicularly on the original wrench. I hope this is understandable.
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Old 30-07-2017, 01:47   #96
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Re: What is the Name of the Tool to Remove this Nut?

would this nut just be an adapter to allow a hand crank to be fitted?
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Old 30-07-2017, 02:40   #97
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Re: What is the Name of the Tool to Remove this Nut?

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Originally Posted by Jubilee39 View Post
would this nut just be an adapter to allow a hand crank to be fitted?
No, if you have a look at the photo in post 68 you will see a YSE 8 without hand start while post 6 in the link below shows another YSE 8 with hand start. The hand start is interesting as it is arranged so you can crank it from either the front or the rear of the engine.
What Kind of Yanmar Engine Is this?
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Old 30-07-2017, 02:47   #98
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Re: What is the Name of the Tool to Remove this Nut?

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Originally Posted by Gregg927 View Post
I've had a few similar situations. On some of those, I was able to straddle the nut from a top on direction, i.e. the open end of a wrench or crescent sticking upwardly and in line with the shaft. Then, apply the torque with a second wrench twisting perpendicularly on the original wrench. I hope this is understandable.
Perfectly understandable and way more succinctly described than my attempt in post 71. It is exactly the method I used.
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Old 30-07-2017, 15:51   #99
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Re: What is the Name of the Tool to Remove this Nut?

NOTHIN' LIKES LICKS !! have 2
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Old 01-08-2017, 09:49   #100
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Re: What is the Name of the Tool to Remove this Nut?

As others have stated, gentle heat won't do it as both the pulley and the threaded shaft are being expanded together.

First, heat both parts together with the hottest heat source you have, then take an ice cube and place it only on the threaded shaft. The heat will expand both parts while the ice will cause the shaft to shrink, sometimes you can actually hear the parts snap apart. I have broken many old and rusted parts apart this way.
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Old 04-08-2017, 05:44   #101
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Re: What is the Name of the Tool to Remove this Nut?

What a compendium of machining/mechanics/DIY tips this thread is. Bookmarking this one; I know I will need one or more of these tips in times to come. Thanks immensely!
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Old 12-08-2017, 09:48   #102
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Re: What is the Name of the Tool to Remove this Nut?

Congrats on getting it off!

For the sake of completion, that nut style is called a "Double D" since it looks like two letter "D"'s placed back to back.



You can also search the term "Spring Shackle Bolt" but nowadays you will see them on small carburetor adjustment screws as about the only place they are common. I suspect that one was put there since it was on a rotating item as a safety measure so it would be less prone to catch a shirt sleeve (lawyer stuff I suspect but don't know for certain)

Glad you got it off! If I had to make a tool I would use a cheap thick wall socket and cut 4 of the flats off, leaving only 2 parallel sides to turn the flats but as you have shown there can be several ways to get a nut off.
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Old 29-08-2017, 19:31   #103
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Re: What is the Name of the Tool to Remove this Nut?

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Originally Posted by MBWhite View Post
Congrats on getting it off!

For the sake of completion, that nut style is called a "Double D" since it looks like two letter "D"'s placed back to back.



You can also search the term "Spring Shackle Bolt" but nowadays you will see them on small carburetor adjustment screws as about the only place they are common. I suspect that one was put there since it was on a rotating item as a safety measure so it would be less prone to catch a shirt sleeve (lawyer stuff I suspect but don't know for certain)

Glad you got it off! If I had to make a tool I would use a cheap thick wall socket and cut 4 of the flats off, leaving only 2 parallel sides to turn the flats but as you have shown there can be several ways to get a nut off.
And for further completion, thanks for posting the name of the nut style. I knew someone somewhere on CF would know.
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Old 30-08-2017, 05:47   #104
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Re: What is the Name of the Tool to Remove this Nut?

Get an impact socket sized so you can grind part of the sides away so it fits over the nut and grabs the sides of it. Attach impact driver and remove the nut.
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Old 30-08-2017, 06:07   #105
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Re: What is the Name of the Tool to Remove this Nut?

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Originally Posted by Three Sisters View Post
First thing, though, would be to follow the threads from the very beginning at the top and verify it is not a reverse thread.
.
Exactly. Often the fasteners on rotating objects have a reverse thread intentionally so the rotation will tend to tighten, not loosen the nut.
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