[LargeFormat] CLA

[Les Newcomer]

There are two schools of thought about home brew CLA'ing

One is, remove the cells, drop the shutter in a zip lock bag pour in some 
lighter fluid, let marinate over night.  then dry with canned air, let it 
'vapor off' for a day or two, put the cells back in and your ready for a 
day on the grassy knoll in Dallas.

I see two faults with this system:   1. It doesn't put any lubricant back 
in. Now I've heard people say they've run their shutters for years without 
a problem. Good for them.
2. While it might have softened the old lube it probably didn't wash it 
away. Capillary attraction is powerfull and anybody that's gone to a coin 
op car wash knows a little rubbing does wonders.  Once the lighter fluid 
is gone, the old lube/varnish is back, maybe not in the same place, but it 
didn't go away.


The second is the dissassembly of the entire shutter, clean it and then 
reassembling and adjusting the escarpment to accuracy.   An ex Graflex 
salesman said during training, Graflex brought the sales people up to 
Rochester for 'boot camp'  During one day they had everybody sit down 
infront of a Graphex shutter and a bunch of tools. "Dissassemble and 
reassemble in 1 hour There will be a test on the accuracy of the shutter 
after that."   After 1 hour most men (they were all men then) didn't have 
half the parts back in, which is what the brass expected. After berating 
them, they gave the moral of the lesson.  "NEVER DO THIS TO A CUSTOMERS 
SHUTTER! Send it to us."


I fall in between.  I open the face, drop new clock oil or "nyoil" with a 
tooth pick on all the posts and bushings I can find, and put it back 
together.

Les

On Friday, January 24, 2003, at 02:41 PM, Loren Wohlgemuth wrote:

> Howdy all,
> Im on the west coast of the US, just north of Verna, well, a lot north,
> near Astoria.  I've posted my lineage before but mostly lurk.
> Question:  Is there anywhere a written treatise on how to CLA a lens?
> I've got a couple that definitely need all that but I'm a bit
> apprehensive to just jump in and unscrew just to see what's inside.
> Also, should I succeed in dismantling said lens, what lubricant should
> one use?  30w? 50w? or spit?
> I just know that someone here has that information tucked away in an
> efile and would love to guide  a neophyte CLA'r along.
>
> Loren in Astoria
>
>
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