MAMIYA - Mamiya M645 Super FilmHolder TechBulletin

Comprehensive technical bulletins for the Mamiya M645 Super film holder, detailing four critical service interventions issued between 1987 and 1988. This workshop manual collection serves professional technicians maintaining and restoring this medium-format system. Bulletin OUR REF.NO 061 provides step-by-step conversion of 120/220 winding mechanisms to the Type 135 RFH system, with complete part replacement specifications and part number references (6270 and 6274 series). Bulletin OUR REF.NO 058 covers full replacement procedures for film rollers and guide plate assemblies, addressing film transport smoothness and eliminating scratching damage on sensitive emulsions like T-Max 120; the parts list includes washers, collars, precision 2.0mm rollers, leaf springs, and metal guide plates. Bulletin OUR REF.NO 057 details the steel ball retention modification, preventing accidental dropout of the BO1.5 steel ball through installation of cap 6270 42571 with adhesive application. Bulletin OUR REF.NO 045 specifies the precise countersinking procedure for film holder mounting holes to ensure proper lock pin engagement and secure positioning. Each bulletin features detailed technical drawings, comprehensive parts lists with exact component specifications, and sequential work procedures essential for accurate service and repair. This collection represents original factory documentation for maintaining the M645 Super film holder system.