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Old 12-12-2010, 04:59   #1
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Worn Anchor Roller Replacement

When the surveyor mentioned that the anchor roller was worn and needed to be replaced I did not expect them to be this bad

Is there a special tool for undoing something like this? I tried a screwdriver but broke it
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Old 12-12-2010, 05:56   #2
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Are you just looking for something to turn the flathead with more force? The two tools that I would be thinking about are a bit brace with as big as a flathead bit as will fit or a ratchet with a nice big bit as well. For both of them, the key is to get a lot of normal force before applying any twisting force.

Have you soaked everything in something like PB Blaster yet? It is certainly worth doing that before you risk destroying the bolt heads. Then again, if you plan to replace the bolts (it is hard to tell whether they are standard from the pic), you can also start by simply cutting them.
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Old 12-12-2010, 07:28   #3
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might work if you can find an impact screw driver. If all else fails, you can drill with a bit just over size of the shaft until the screw head spins off then, hopefully, remove with a vise grip
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Old 12-12-2010, 08:18   #4
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It appears to me that it’s a machine screw, with a slot head at one end, and a hex nut at the other.
If so, I’d restrain the slot head and turn a wrench to loosen the nut.
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Old 12-12-2010, 09:11   #5
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I tried using the biggest screwdriver that fitted the slot and then used a vice grip to give it some turning force, then snap! I had also given it a spray with wd40 to hopefully help it along.

I guess I needs to find a very wide screwdriver to spread the load and perhaps a couple of hits with the multi-purpose too, the hammer.
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Old 12-12-2010, 09:17   #6
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It appears to me that it’s a machine screw, with a slot head at one end, and a hex nut at the other.
If so, I’d restrain the slot head and turn a wrench to loosen the nut.
No nut other than the one holding the screwdriver
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Old 12-12-2010, 09:20   #7
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No nut other than the one holding the screwdriver
And the nut posting the wrong photo
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Old 12-12-2010, 09:28   #8
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Have you tried applying heat to the threaded plate to help crack the bond. it should heat much faster than the bolt..
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Old 12-12-2010, 09:40   #9
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Ha! I just typed PB Blaster as my password to log on. Cracked myself up.

Anyway, you wouldn't believe how much better PB Blaster is than wd40 for this application. It's a corrosion buster not a water displacement formula.

I'd soak it good over night, then again at the attempt to remove. Combined with a tapping action around the threaded area. Your screwdriver needs to fit perfect to the bottom of the slot and have a proper shape without wear. Must be high quality steel.

As said heating will help if needed. The thinner plate will definitely heat up faster than the bolt itself. Shouldn't take much heat, well before discoloration occurs. Helps to prevent tempering changes if one is careful with the heat. I'd try it without heat first.

You can get that out intact. Good luck.
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Old 12-12-2010, 10:12   #10
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I guess I have to patiently wait until I get back there to try something else. Not sure if I should take the Swedish equivalent of pb blaster on the flight. I guess I will just keep an eye out for some useful tools to take to Greece.

I hope I measured correctly so I get the right rollers

I have to admit it but I was pretty happy I did not drop it in the drink. I did tie on some "safety" lines just in case I was all thumbs.
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Old 12-12-2010, 17:28   #11
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Be careful using heat around WD-40, it is extremely flammable and has a low flashpoint.

Kano would work to loosen the screw as well, and it is also flammable, but works great.
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Old 14-12-2010, 08:24   #12
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Originally Posted by hoppy View Post
I guess I have to patiently wait until I get back there to try something else. Not sure if I should take the Swedish equivalent of pb blaster on the flight. I guess I will just keep an eye out for some useful tools to take to Greece.

I hope I measured correctly so I get the right rollers

I have to admit it but I was pretty happy I did not drop it in the drink. I did tie on some "safety" lines just in case I was all thumbs.
The other trick I learned from car mechanics is to put a thing into the bath made of... Coca Cola Make wonders sometime
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Old 14-12-2010, 12:41   #13
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The other trick I learned from car mechanics is to put a thing into the bath made of... Coca Cola Make wonders sometime
That's a good idea to try and something I know I can find there
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Old 14-12-2010, 13:20   #14
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The other trick I learned from car mechanics is to put a thing into the bath made of... Coca Cola Make wonders sometime
A lot of women I know happily clean their jewelry like that...
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Old 14-12-2010, 22:19   #15
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If you get a suitable size screwdriver bit and chuck it in a drill press, you can then position the part on the drill press table , apply pressure to the bit, and turn it with a shifting spanner to loosen the screw off. Pushing down on the bit with the press will stop it jumping out of the slot.Unplug the drill press during this procedure.
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