DURST - Durst Laborator 138 Service

Complete service manual for the DURST Laborator 138 S and G 139 professional enlargers, delivering the technical guidance needed to maintain and repair these precision laboratory photographic instruments. This workshop documentation covers all major maintenance and repair procedures: counterweight spring and column head replacement, counterweight spring retensioning, steel cable replacement and adjustment, friction drive retensioning, guide roller exchange in the enlarger head sleeve, roller replacement in the baseboard support arm, and baseboard servo-adjustment system maintenance. Instructions are structured with step-by-step procedures, numbered component references, and identification of required Durst specialized tools. Technical specifications are organized by serial number ranges (units below 1363, from 1363 onwards, and from 4619 onwards), ensuring you apply the correct adjustment data for your specific enlarger. Detailed photographic documentation throughout illustrates work areas and critical components, allowing technicians to execute precise maintenance and efficient repairs. Additional coverage includes friction coupling reset procedures and various adjustment techniques to restore optimal equipment performance.