Mamiya 6/7 DIY Repair: Thread Sealer and Wind Lever Adhesive
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
If you are going to be repairing your Mamiya 6/7, please be mindful of a few things:
1.) Easy on the thread sealer
2.) Go lightly on adhesive when installing the wind lever
3.) Use the correct adhesive
Details:
Photo two shows the state of the rangefinder adjusting screws on the Mamiya 7II shown in the first photo. They are encased in thread sealer. This adds to the work that needs to be done to loosen these screws and I had to scrape out sealer in the slotted screw head just to turn it. And, the globs of thread sealer are not even the proper thing to put on these adjustment screws as it appears to be Blue threadlocker which is made for internal threads and did not hold these screws in place! All it takes is one drop of an external sealer.
Photo three is of the same Mamiya that had the wind lever attaching screw and rubber cover slathered in a cyanoacrylate adhesive (so called instant glue, crazy glue, etc) that actually was in the threads of the attaching screw and it took extra time to get this off the camera. Plus a bit of time scraping off glue.
Photo four shows how another Mamiya 7 wind lever attaching screw and rubber cover had the correct adhesive applied (Pliobond) but way too much in quantity. The problem with this scenario is that the attaching screw is left hand thread and if the glue binds the head of the screw to the wind lever, the screw will loosen when the lever is put into the rest position.
So please, use a light touch.
