This is a vintage 1973 REPAIR-MASTER® technical service manual for D & M (Design & Manufacturing Corp.) automatic dishwashers, published by MASTER Publications, Inc. of Santa Monica, California. As a comprehensive cross-reference guide, it was an essential tool for professional appliance servicemen, covering the diagnosis, repair, and parts for dishwashers sold under nearly two dozen major American brands of the era, including Admiral, Frigidaire, Gibson, Kelvinator, Kenmore, Magic Chef, Norge, Philco, Roper, Westinghouse, and Youngstown. The manual's foreword, written by editor Art Gilmore, emphasizes its purpose as a "ready reference" to ensure the proper "washability factor" for the end user, reflecting the practical, hands-on ethos of mid-century appliance repair. The content is organized into four detailed sections, beginning with trouble diagnosis charts and checking procedures for both early and late models, including specific guidance for portable dishwasher complaints. The extensive service procedure section delves into electrical components like wiring diagrams, timers, motors, and solenoids; water systems including valves, discharge pumps, and spray arms; and mechanical adjustments for cabinets, doors, and detergent dispensers. It provides granular, technician-level instructions, such as testing a timer motor's pinion gear for hesitation and servicing the specific "Bird Feeder" style detergent cup mechanism. The final section contains complete parts lists for portable and under-counter models. The interior is richly illustrated with clear, high-contrast black-and-white photographs and precise technical line drawings, such as those detailing latch assemblies and component testing. The condition of the manual shows its age and use. The front cover exhibits significant foxing, staining, and dark spotting across the entire teal blue surface, with noticeable wear along the edges. This heavy soiling is primarily confined to the exterior cover. In contrast, the interior pages viewed, including the table of contents and technical illustrations, are markedly cleaner. They show only light, even yellowing consistent with the paper's age, while all text, diagrams, and photographic figures remain sharply defined and completely legible. The manual is staple-bound, allowing it to lay flat for reference. This is a valuable primary source document for restorers, historians, and technicians working on vintage American-made dishwashers from the 1960s and early 1970s, providing the specific OEM knowledge required to maintain these ubiquitous D&M-manufactured appliances.