removing windscreen safely

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Tinkley
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Re: removing windscreen safely

Post by Tinkley » Mon Apr 28, 2014 6:28 pm

The 'Cheese Wire' seems to be the current tool used by most fitters. BTW you need to change the wire about every 30 or 40 screens as it goes 'ping' from the twisting. I would guess you could use a guitar string for it, if trying to source a short length of fine wire.
However an alternative I have seen used, was a blade bent in a J shape and this was fed around the screen seal after the surround trim was removed. I am sure the first replacement I had on my 14 was
done this way. The upright bit needs a good handle and may even have been used two handed with a pull rope low down and the other higher up. Pretty sure that was how the guy did it. 24 hours to set in those days, about 1991.

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Re: removing windscreen safely

Post by B-Hive » Mon Apr 28, 2014 6:44 pm

Tinkley wrote:The 'Cheese Wire' seems to be the current tool used by most fitters. BTW you need to change the wire about every 30 or 40 screens as it goes 'ping' from the twisting. I would guess you could use a guitar string for it, if trying to source a short length of fine wire.
However an alternative I have seen used, was a blade bent in a J shape and this was fed around the screen seal after the surround trim was removed. I am sure the first replacement I had on my 14 was
done this way. The upright bit needs a good handle and may even have been used two handed with a pull rope low down and the other higher up. Pretty sure that was how the guy did it. 24 hours to set in those days, about 1991.
Not sure i'll be doing 40 windscreens, 2 will do me just fine...but good idea about the guitar string..I have plenty of musso friends that I can mooch an old guitar string from.. I'll Go-Pro the event If I go ahead with this and record how to do it or at least one way how not to do it...
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cauchoiskev
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Re: removing windscreen safely

Post by cauchoiskev » Thu May 01, 2014 6:13 pm

I'm amazed people have had so much trouble with this. I've done it twice, with a bike brake cable and a couple of lengths wood as handles.

I did it on my lonesome, which is long hard awkward work, but no problem as long as you pull perpendicularly to the screen to avoid damaging it. With a pal to help you, it should be a breeze.

I would say that the difficult part is sticking it back on correctly so that it doesn't leak.

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Re: removing windscreen safely

Post by Defender110 » Tue May 06, 2014 3:05 pm

Kevan
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Re: removing windscreen safely

Post by Mothman » Tue May 06, 2014 3:41 pm

Watched a professional screen fitter remove the front glass from my scrap BX and he made it look easy using the 'cheese wire' method. Didnt look too difficult so thats what i will do should the need arise.

Andy

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Re: removing windscreen safely

Post by B-Hive » Tue May 06, 2014 4:00 pm

Mothman wrote:Watched a professional screen fitter remove the front glass from my scrap BX and he made it look easy using the 'cheese wire' method. Didnt look too difficult so thats what i will do should the need arise.

Andy
My car has now since been rear ended on the street.. so the windscreen job is back on..is "cheese" wire similar to guitar string wire?...
Did you happen to see how he/she made the first breach from outside to inside..? guessing it was a bit of a poke prod push and fiddle...

That tool in the previous post looks the bomb..wonder how it works?
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Re: removing windscreen safely

Post by Defender110 » Wed May 07, 2014 2:35 pm

B-Hive wrote:..is "cheese" wire similar to guitar string wire?...
No a cheese wire is generally much thinner and sharper than a guitar string sometimes having a serrated cutting edge.

B-Hive wrote: That tool in the previous post looks the bomb..wonder how it works?
Basically it is a blade with a handle on and a second handle on a leash that you use to pull the blade round; You insert the blade into the sealant holding the blade horizontal to the screen by holding the handle perpendicular to the screen, you then push the blade round the screen with one hand whilst pulling it with the second handle.
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electrokid
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Re: removing windscreen safely

Post by electrokid » Thu May 08, 2014 12:47 pm

I've not had to do this myself but reading about the problems I'm sure I would take a slightly different approach :shock:

Cheese wire yes - but heated. Presuming the car from which it needs to be removed is something of a parts car / scrapper then I see no problem with the stink generated from melted / burnt adhesive.

I would grab some of the resistance wire I have on the shelf - but you may need to acquire some. That has recently become much easier than it used to be due to the development of E-cigarettes !

The following types of wire could be used... nichrome, kanthal, nikrothal, stainless steel, or just do an ebay search for resistance wire. You'll ideally need some kind of reasonably powerful DC power supply to connect to each end of the piece of wire and a pair of welding gloves or similar to hold the hot bits. Experiment to find the best wire length / voltage / current etc.

If the glue is a pure silicone rubber then there should be no safety concerns from the fumes since it burns to form a silicon ash and CO2 only. There are probably additives in the glue so probably wise not to breath the fumes anyway.
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Re: removing windscreen safely

Post by mat_fenwick » Thu May 08, 2014 3:18 pm

Any excuse to play with electrickery! :lol:
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electrokid
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Re: removing windscreen safely

Post by electrokid » Thu May 08, 2014 8:19 pm

:lol:

Oh - I need no excuses :D in fact my latest adventure involves temperature measurement :wink: and the circuit was pretty much finalised this week. It's a 2 wire device that can sit at the end of a long cable if required - it is fully compatible with 4-20mA metering and also sends pulses back to the sending / launch equipment - and the frequency represents the temperature (within 1 degree C) so 23Hz = 23°C and the range is 0-100°C

And the mundain bit = it's for the central heating system :shock:
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Re: removing windscreen safely

Post by Defender110 » Thu May 08, 2014 9:00 pm

A hot wire might just rebond the sealant as it passes through?
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electrokid
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Re: removing windscreen safely

Post by electrokid » Fri May 09, 2014 9:10 am

That's true Kevan: if it is silicone based it should decompose but other chemistry may just melt and re-bond: I don't know what kinds of adhesive are available.
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