[RE-wrenches] Dielectric grease,torques & module glas

[robert ellison]

I wonder if the caulk could have been removed with a sharp razor blade
without hurting the coating?

Bob

On Mon, Nov 24, 2008 at 8:18 AM, Tom DeBates <habitek83 at yahoo.com> wrote:

>   good day Wrenches,
>   I've had a list of questions to pose. Please excuse me if these have been
> addressed previously.
>
> 1. What are your thoughts on using dielectric grease on terminal
> connections?....especially on exterior connections, even if those
> connections are in a weather-tite enclosure.
>
> 2. What are you using for a torque setting for 1/4-20 module clamp bolts?
> Seems most manufacturers spec 15 ft.-lbs. We have found this to be too high
> (especially with t-bolts) and are using ~ 140 in.-lbs.
>
> 3. A tip on module glass: We recently had some Evergreen 170's stored on a
> roof (flat) for a project (uncovered!). The roofers decided that they would
> make a good workbench and when we went to install there was some caulk
> (urethane?) on the face of one of them. After trying to remove the caulk
> with a wood shim, I tried using mineral spirits which, of course, was
> totally ineffective. The roofers happened to have some acetone on-hand which
> I borrowed and removed the caulk...big mistake. After installation, it was
> obvious that there was a module with "smudges" that we could not wash-off. I
> contacted Evergreen about this but was unable to receive an answer to my
> question as to whether-or-not the acetone had etched or removed the
> anti-reflection coating. I think that it did. We replaced the module.
>
> thanks,
> Tom
>
> Tom DeBates
> Habi-Tek
> 524 Summit St.
> Geneva,IL. 60134
> 630-262-8193
> fax 630-262-1343
>
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