Thanks everyone, the operation was easier than expected and my
problem is solved. The ring moves free and smooth now. Hardest part
was to find the reset-pin after it made a catapult start when I
removed the shutter-speed ring without removing the pin and its
spring first. Had to resort to the vacuum-cleaner with a fresh dust-
bag.
Stefan
Am 15 Nov 2006 um 5:23, schrieb Chuck Norcutt :
> This has been discussed more than once on the list and I think even
> within the past few months and you may be able to find some of that in
> the archives. Here are some notes from a longer ago episode:
>
> Chuck Norcutt
>
> --------------------------------------------------
> Date: Sun, 01 Jun 2003 21:40:56 -0400
> From: "John A. Lind" <jlind@xxxxxxxxxxxx>
> Subject: [OM] Fixed! OM-4 Stiff Shutter Speed Ring
>
> Thanks to C.H. Ling for his tips and Mark Dapoz for his on-line manuals.
>
> Carefully removed the lens flange, then very, very carefully removed the
> shutter speed ring. Yep . . . gotta watch for the reset pin and spring
> when pulling off the lens mounting flange. Cleaned the shutter speed
> ring thoroughly, put a very tiny amount of white lithium grease on the
> detent ball and extremely thin coating on the ring detents that mate
> with it, then very carefully reassembled the lens mount.
>
> Works smoother now than it ever has.
>
> - -- John
>
>
> Date: Mon, 02 Jun 2003 01:30:31 -0400
> From: "John A. Lind" <jlind@xxxxxxxxxxxx>
> Subject: Re: [OM] Fixed! OM-4 Stiff Shutter Speed Ring
>
> At 23:32 6/1/03, you wrote:
>
> >In a message dated 6/1/2003 8:34:07 PM Central Standard Time,
> >jlind@xxxxxxxxxxxx writes:
>
> >>Works smoother now than it ever has
> >
> >John, Where do we send our OMs for repair? Should John H. and Clint
> look >for part time work at the 7 Eleven? Were I attempting this I'd
> still be >look for that ball bearing. Great to hear of your success.
> Bill Barber
>
>
> Thanks Bill . . .
> Before starting the "surgery" I had visions of trying to find the ball
> bearing . . . or the spring and pin . . . during/after disassembly. The
> spring almost got away as I was reassembling it.
>
> Looked at the exploded parts view (thanks to Mark Dapoz) and made a
> reassembly risk assessment. Disassembly isn't usually that hard; proper
> reassembly can be very difficult. Akin to falling from a ladder; not
> the fall that hurts; it's the sudden stop at the end. Took the risk as
> I want three 35mm bodies on hand this next weekend for a wedding shoot;
> having a fourth body as a spare makes me feel better.
>
> Used a ring-light large magnifier on a stand and worked in a shallow
> tray to limit things rolling off very far. The only tools required were
> a pair of forceps (handling the pin and spring) and very small jewelers
> philips driver. The critical part was watching the pin and spring, and
> ensuring the registration of the shutter speed gear train at the bottom
> didn't get out of whack.
>
> The SS Ring only has the detents and a slot for a tab that mates with
> and turns another ring under it . . . the second ring under the SS Ring
> has the teeth that drive the SS gear in the bottom of the camera . . .
> and fortunately it doesn't have to be removed (but it is loose at that
> point and can fall out). Were it any deeper than removing the flange
> and SS ring, or if cleaning and very judicious lubrication of the detent
> bearing/surfaces hadn't solved the problem, it would have gone to one f
> them. It's about as deep as I want to dig into one and [seriously]
> **don't** want to do this routinely.
>
> John H. has overhauled two bodies for me (he's closer than Clint) . . .
> did great work on both.
>
> Thanks,
> - -- John
>
>
> Date: Mon, 2 Jun 2003 09:06:28 -0400
> From: "John Hermanson" <omtech@xxxxxxxxx>
> Subject: Re: [OM] Fixed! OM-4 Stiff Shutter Speed Ring
>
> Luckily the bb on that model tends not to fly away. That job is left to
> the spot switch and spring. Glad it worked out for you.
>
> ------------------------------------------------------------------
>
>
>
>
> Stefan Kahlert wrote:
> > Yesteday my OM-4 devloped a problem. The ring on the bayonet where
> > you set the exposure time got increasingly hard to turn and now it is
> > close to impossible to set time. Otherwise the camera works fine.
> >
> > I have the exploded views and it seems to be quite easy to remove the
> > bayonet and give the detent-mechanism a clean and lube. Will this
> > probably solve the problem? Any caveats?
> >
> > best wishes
> >
> > Stefan
> >
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