CurtPalme.com Home Theater Forum

digitalayon · Joined: 02 Mar 2009 Posts: 921

I only ask because I saw Nash's video(think it was him) of a swap and he did not use any. What about using a O rings that came from other units? I will be doing this on my 9500 LC. Also I did not touch the C element when taking it out but my son did. I do not see any prints. However what's best way to clean and wipe to be sure? How do you guys do it when transitioning the lenses and transporting or shipping and preinstall prep?

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

digitalayon · Joined: 02 Mar 2009 Posts: 921

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

He may not have any at the moment but he has a lot of experience (and is very thorough) when packing them.

If its not glued in then no need to glue it in place. You have to be careful when locating the O-ring (I would use the O-ring that came with the Marquee-I see no reason to use the one from the 1292) because if doesn't sit flush you'll get a leak.

digitalayon · Joined: 02 Mar 2009 Posts: 921

I am wondering if the Marquee O-rings just get a little warped over time and the advanced article on this site using RTV is precautionary. However RTV IS A 24 HOUR SET. Wondering why it says 5 days or a week or whatever the hell it says.

**Curt Palme** · Posted: Mon Aug 03, 2015 10:23 pm Post subject:

I've never used RTV, and have swapped out many Marquee elements. HOWEVER.. if there are chips out of the plastic of the C element you are trying to put in, it will leak. Barco had the better idea with the O ring. I think the O ring in a MArquee will lift the C element too high though, causing potential leak issues in itself.

digitalayon · Joined: 02 Mar 2009 Posts: 921

km987654 · Posted: Mon Aug 03, 2015 11:47 pm Post subject:

Never used silicon for that. Its probably counter productive as it might effect the O ring seal.

digitalayon · Joined: 02 Mar 2009 Posts: 921

km987654 · Posted: Tue Aug 04, 2015 4:29 am Post subject:

digitalayon · Joined: 02 Mar 2009 Posts: 921

CIR Engineering · Posted: Thu Aug 06, 2015 1:34 am Post subject:

I don't think I have ever seen a colored C-Element siliconed in on a 9" Barco or a Sony before. I certainly wouldn't glue it in on either of those makes. On Marquee they come both ways, but I never silicone them unless like Curt says, there is damage on the contact surface already... usually the said damage comes from removing old silicone from an element that was in a Marquee.

I just retubed and swapped C-Elements on an MP9 two days ago; I took the old siliconed red out of the original MP9 and replaced the clear that was not glued into his new Marquee tube. I was forced to put a very thin layer of RTV on the element because I put some minor abrasions on the element removing the original silicone.

If you use RTV be sure to use the original silicone formula. This is usually called "silicone 1" now (by GE). Don't ever use "silicone 2" or "silicone II" as this does not cure the same way (I can elaborate if you want). You can easily get clear silicone 1 at HomeDepot, but black must be mail ordered (clear is fine on a C-Element).

When I remove C-Elements I take them to the sink and rinse them in water. I then use regular dish soap (nothing abrasive) and my bare hands to clean the C-Element under running water. I dry them primarily by patting dry with paper towels and then I go over them lightly with a dry microfiber cloth to pick up any lint.

If I have a C-Element container I store and ship in that. If not I tightly wrap the element in shrink wrap (or plastic wrap). I then put the element inside a plastic bowl with the same diameter as the contact surface so that the bowl holds the C-Element without anything touching or rubbing the element's surface. Next I cut a circular piece of cardboard to go over the bowl and shrink wrap that in place. After that, it's a large box with loads of Styrofoam peanuts. I can post a photo if this is not clear.

I've never had a C-Element get any damage with these methods. Before installation, I always clean the C-Element with a 50/50 mix of denatured alcohol and water using a spray bottle and microfiber with very little pressure on the cloth. I have never scratched a C-Element this way.

Best,
craigr