This is an original KitchenAid KD-18 series dishwasher service manual, published in April 1978 by the Hobart Corporation. The technical guide contains repair and maintenance information for the KD-18 series automatic dishwashers manufactured during the 1970s. The manual covers models KDC-18 Custom, KDI-18 Imperial, KDP-18 Patrician, KDS-18 Superba, KD-38 series dishwasher-sink combinations, and KD-58 series convertible-portable units. The document originated from the KitchenAid Division headquarters in Troy, Ohio, Miami County. Designated as Form 12258C, this edition supersedes the June 1977 version and reflects manufacturing practices under the Hobart Corporation. The manual details technical procedures for appliance servicing, including components such as the timer, field wiring, drain valve, evaporation channel, and door mechanisms. It covers the removal and adjustment of fill valves (differentiating between single-coil portable and dual-coil built-in types), the door latch, program switch assembly, and upper rack tracks. Safety cautions regarding live voltage on bimetal units within the detergent dispenser are included. The guide describes the feature sets of the models, including the Superba’s 16-position upper rack and “Soak’n Scrub” cycle, and optional features such as the rinse agent dispenser on Imperial and Custom models. Technologies documented include the “Sanitized Flo-Thru Drying” system and automatic detergent dispensers. The front cover exhibits foxing, staining, and discoloration, particularly on the right side. Edges show wear, and the three-hole punches along the left margin show stress. Interior pages show light yellowing and minor foxing near the edges and punches; text, diagrams, and photographic illustrations remain legible. The manual contains exploded-view schematics and step-by-step photographs, including Fig. 40 detailing inner door components. The document is intended for use in servicing and preserving KitchenAid dishwashers from the late 1970s.