Bronica ETRS Zenza Bronica Zenzanon EII 75mm Disassembly

[CaCtus_SaNdwich]

Hi, I'm attempting to service a Bronica 75mm lens due to a sticking shutter.

I've hit a wall while trying to remove the shutter to clean, on the disassembly guides I've been using it says to use a wrench to unscrew the lens lamp ring, mine is not budging one bit. Am I missing something? There are two screws that appear to be blocking the ring, which don't seem to want to move either, but they aren’t shown being removed in both pdfs.

According to the service manual, it's just a case of unscrewing. I've attached the PDFs I'm using, along with a photo. Any advice would be greatly appreciated.

Cheers

 

[OAPOli]

The retaining ring should unscrew. It's possible there is some adhesive; try wicking some solvent but be careful with acetone as it can scar plastic. I've taken two of those apart and one had a super tight rear lens group.

The two screws are on the shutter side and are meant to locate the shutter.