Fuji GS645S Wide60 Shutter disassembly

[OAPOli]

Yes, carefully remove the cone (it's glued) and you should be able to remove the front group.

 

[BDW]

Thanks! When I come to reassemble, does anyone recommend what glue to use to put the cone back? I ask because my experience with super glue has left a cloud like residue.

 

[BobUK]

You may have to clean inside the lens again in the future. So avoid super glues, epoxy resins and anything that could be looked upon as permanent.

I just used three small blobs of shellack glue. There are most probably references to making your own here on PHOTRIO and FADU.

Shellack glue has been used since the early days of camera making. It is easily dissolved in alcohol if the parts require separating at a later date.

To my way of thinking, there are no loads on the lens cone, so no need for a strong bond.

 

[BDW]

Thanks so much, I was going to use epoxy but what you said makes so much sense. So glad I joined this forum!

 

[OAPOli]

I would use Pliobond. Super Glue types (cyanoacrylates) will spoil optical surfaces and are too strong. Epoxy is also a permanent adhesive.

 

[z0r]

Hey @BDW. First of all: Everything you do is at your own risk. If you fell like breaking something I'd not advise you to.

But: Yes, I'd agree. Gently remove the cone with a plastic clip. Then you are at IMG_0457.JPEG and need to disassemble the whole thing until the front lens can be unscrewed. For this you need a lens spanner wrench. Handling a lens spanner wrench can be very fiddly, especially when the lens screw sits very tight. Then the risk of slipping of and breaking something is great. This is the most difficult part here. Unscrew it from the outer screw. You do not want to unscrew by the inner screw and disassemble the lens group. Attatched to this message are all pictures I made when disassembling it (ordered in Disassambling steps up unto the shutter). Maybe this is helpful.

One small hint: When disassembling the front unit, you can lose a ball bearing (see IMG_0458.JPEG, underneath the v-shaped spring). Do not lose that, otherwise the aperture loses its clicking.

EDIT: Somehow the replies since @BDW 's question where not displayed until my reply? Sorry for that. Anyway congrat's!

Also here is a video of the shutter in its sticky state

 

[z0r]

@BobUK To your viewfinder question: If you have already checked everything with the rod coming from the lens to the body, then you need to look into the rangefinder. For this you need to desolder the electronics and remove the top hood. When desoldering the electronics, note that there are two black wires. IMG_0370.JPEG shows which black wire is connected to GND and which to something related to the flash.

Removing the hood reveals the focusing mirror, which is guided on a rod (see IMG_0375.JPEG). In my case, I cleand the rod with IPA and used a tiny tiny amount of lube onto the rod. spread the lubed by moving the mirror back and forth and this did the trick for me. Attatched you finded my pictures of the disassembly as well as a video of the sticky state and the good state.

 

[corydon]

Dear all,

I noticed my GS645s's shutter speed 1/60 setting is not always working correctly. If I try 10 times, 50% chance it performs well (slower than 1/125 and faster than 1/30), but another 50% it sounds working slower than1/30 somewhat like 1/15. The 1/125 and 1/30 are working properly as I am aware. If I set 1/60 and hold the shutter ring firmly while releasing the shutter, it seems the 1/60 working well. Please could kindly adivse what the root case would be? Thanks!

 

[BobUK]

@z0r

Many thanks for the time and effort you have put in on repairing the Fuji.

Thanks to you I now have a correctly working camera again.

Bob.

 

[OAPOli]

Dear all,

I noticed my GS645s's shutter speed 1/60 setting is not always working correctly. If I try 10 times, 50% chance it performs well (slower than 1/125 and faster than 1/30), but another 50% it sounds working slower than1/30 somewhat like 1/15. The 1/125 and 1/30 are working properly as I am aware. If I set 1/60 and hold the shutter ring firmly while releasing the shutter, it seems the 1/60 working well. Please could kindly adivse what the root case would be? Thanks!

Ideally you would need a shutter tester to confirm the speeds.

My guess is that the pallet lever is at an unstable position. You could try pivoting the escapement slightly to see.