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     Ethostech Tinkerer Username: Ethostech Post Number: 141 Registered: 07-2006 Rating: N/A |
I don't entirely agree with Scott. Although oil on the shutter blades is sometimes the cause of "tired shutter syndrome", mostly it is due the age congealment of the factory grease on the activator ring. And that would be why Dan Mitchell advocates as he does. It usually takes several overnight soakings and repeated procedure to get that stuff off the activator ring. In the very worst cases the shutter blades and activator ring have to be removed. But most shutter-drag malfunction is usually caused by accumulated muck in the mechanism - the escapements in particular, The three obvious cams will need a touch of grease but generally no oiling anywhere. The shutters run better dry. The Japanese learned this early in their days of copying the German Compurs et al - and most Japanese "between lens shutters" are factory assembled dry - save for very light cam grease lubrication. "Flood cleaning" (as with pure petroleum spirit) is where the removed and exposed shutter mechanism is is submersed and agitated until all gunk floats away. (Usually submersed for a couple of days) . "Flush cleaning" is where the shutter remains on the camera but its mechanism exposed for flushing by applying petroleum spirit gently with a soft sable brush whilst titling the camera forward to avoid fluid seeping into the iris and shutter blades (and carrying debris into them.) There are those whom in lieu of oiling, advocate a Flood Cleaning final rinse with a small amount of fine graphite powder suspended in the petroleum spirit. I have found such to be VERY BAD practice because for evermore you will be plagued by "little sparklers" on your lens glass optics. |