    
Ethostech
Tinkerer
Username: Ethostech
Post Number: 57
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 07, 2006 - 01:12 am: | 
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The rubber shock absorber ring on the hub of the shutter detent latch has turned to black sticky gunk. Needs replacing.
It is a major stripdown job as with withdrawal of the complete mirror-box assembly, lots of wires to desolder and resolder - and some of them very tricky to access.
A typical symptom of your described fault is a heavy "clunk: as the film advance lever returns after the cocking-stroke.
(The main heavy mirror-box spring is being tensioned but not latching and therefore letting go with a clunk).
It is most unlikely there is anything at all wrong with theactual shutter.
As to the replacement part. Procure a length of model aircraft glow-plug engine neoprene fuel-tube of correct diameter - and squarely slice off a 1/10" thick washer nice. The job will never need to be done again as long as the camera is a camera.
There are actually 4 such shock absorbers in the ME Super - so one would not pull the mirror-box without replacing all four.
All extisting grease on the mirror-box mechanism to be thoroughy cleaned off and the mechanism regreased with graphite grease or similar. But NOT lithium m grease. |
