Clean the Mamiya 645 frame counter area

Objectif

Clean the mechanical frame-counter area when return to 0 becomes incomplete, intermittent, or stuck.

The image below identifies the counter toothed wheel and the lever area to check in its rail.

Prerequis

Materials

• Naphtha essence F
• Toothpick
• Lint-free paper

Etapes

1. Apply a very small amount of naphtha in a targeted way under the toothed wheel.
2. Gently mobilize the area with a toothpick to help loosen deposits without scratching or forcing.
3. Absorb residue with lint-free paper.
4. Repeat until movement is freer and return is clean.
5. Then check that the small lever in the rail is not obstructed, slowed, or stuck by dirt.

Validation

The counter returns to S sharply and repeatably, without sticking or partial return.