🏷️ Basic Information Identification Make: Chevrolet Model: Model K Year: 1925 Series: Superior Model Series K Codes Product Code: CHEV-K-1925-WDM 👋 Introduction Market Position Vehicle Segment: Full-size passenger automobile, representing Chevrolet's offering in the mid-to-upper market for the era. Competitive Analysis Key Competitors: Ford Model T (though often positioned slightly lower), Dodge Brothers, Oakland, Hupmobile, Studebaker. Key Features Value Proposition: Chevrolet aimed for reliability, solid engineering, and relative affordability compared to luxury marques, offering good value for the period. Era Context: This manual pertains to an era where automotive electrical systems were becoming more sophisticated but still required detailed understanding for maintenance and repair. 📋 Manual Details Coverage Areas Primary Coverage: Electrical System Wiring Diagrams Secondary Coverage: Component Identification, Circuit Functionality Page Count Estimated Pages: 20-30 Manual Type Type: Wiring Diagram Manual / Electrical Service Manual Purpose: Essential for diagnosing and repairing electrical issues on the 1925 Chevrolet Model K, from simple bulb replacements to complex circuit tracing. Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Ignition System: Detailed wiring for ignition coil, distributor, points, and condenser. Lighting System: Headlamps (likely Lucas or similar), tail lamps, brake lamps (if applicable for the era), interior lighting (dash illumination). Starting System: Wiring for starter motor engagement, solenoid (if equipped), and battery connections. Charging System: Diagrams for generator (dynamo), voltage regulator (if present), and battery charging circuit. Instrumentation: Wiring for ammeter, oil pressure gauge, water temperature gauge (if applicable), and speedometer illumination. Horn: Wiring for electric horn operation. Wiper System: If equipped with a windscreen wiper, wiring for its operation. Electrical Components: Wiring diagrams for all major electrical components including battery, generator, starter, ignition system, lighting, horn, and dashboard instruments. Procedures Included Troubleshooting: Guidance for diagnosing common electrical faults based on circuit paths and component function. Component Testing: Implied guidance on testing individual electrical components within their respective circuits. Wiring Repair: Understanding correct wire routing, splice points, and termination methods for repair. Wire Identification: Guidance on identifying wires by color code and position within the harness. Technical Depth Depth: Comprehensive for electrical system diagnosis and repair, focusing on schematic interpretation. Detail Level: Detailed wire colors, gauge sizes (where specified), connector types, and component locations. Fuse Protection: If fuses were used in the 1925 Model K electrical system, their location and circuit protection function would be detailed. 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (if optically scanned and text-recognized) Compatibility: Compatible with any device capable of opening PDF files (PC, Mac, tablet, smartphone). Print Quality Resolution: High-resolution scan of original diagrams, suitable for printing. Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, Overhead Valve (OHV) Displacement: Approximately 171 cubic inches (2.8 Liters) Bore X Stroke: 3.5 inches x 4.75 inches Performance Horsepower Rated: Approximately 25-30 bhp at around 1500-1800 RPM Torque Estimated: Not officially rated in modern terms, but designed for robust low-end torque for its era. Fuel System Carburetor: Single-barrel carburetor, likely a Marvel or Zenith model specific to Chevrolet. Fuel Type: Gasoline Lubrication Oil Capacity: Approximately 4 quarts (3.8 Liters) of SAE 20W or 30W oil, depending on ambient temperature. 🔧 Transmission Standard Type: 3-speed manual transmission Optional Type: N/A Features Clutch: Single dry plate clutch Gear Selection: H-pattern shifter with central or floor-mounted lever. Fluid Specification Fluid Type: SAE 90 Gear Oil (GL-1 rating likely) 📐 Dimensions Exterior Wheelbase: Approximately 103 inches (2616 mm) Overall Length: Varies by body style, but typically around 150-160 inches (3810-4064 mm) Weights Curb Weight: Approximately 2200-2500 lbs (998-1134 kg), depending on body style. Gross Vehicle Weight Rating: Not explicitly rated in modern terms, but designed for passenger and light cargo loads. 🛡️ Safety Features Ratings Crash Test Data: N/A (No standardized crash testing existed in 1925) Active Features Brakes: Four-wheel mechanical drum brakes (actuated by rod or cable). Steering: Worm and sector steering gear. Passive Features Seatbelts: N/A Airbags: N/A 💡 Technology Features Infotainment Radio: Optional accessory for higher-trim models or aftermarket installation. If present, manual would cover its basic wiring. Driver Assistance Features: N/A (No electronic driver assistance systems were available). Connectivity Features: N/A (Vehicle connectivity was non-existent). 🔧 Maintenance Service Intervals Oil Change: Every 500-1000 miles or seasonally, depending on driving conditions. The manual's electrical focus means this is inferred rather than explicit. Grease Points: Regular lubrication of chassis points (king pins, tie rods, spring shackles) at frequent intervals (e.g., weekly or bi-weekly). Fluid Specifications Engine Oil: SAE 20W or SAE 30W (depending on temperature). Refer to specific oil specifications for the era. Transmission Oil: SAE 90 Gear Oil (GL-1). Brake Fluid: N/A (Mechanical brakes did not use hydraulic fluid). Known Issues Electrical Wiring: Aging insulation (cloth-wrapped rubber) prone to cracking and short circuits; loose connections at terminals and switches; generator or dynamo output issues;...