The Allis-Chalmers D-19 Diesel, produced from the early to mid-1960s, is an agricultural and utility tractor recognized for its robust construction, reliable diesel power, and versatility in farm tasks. This model, part of the popular 'D' series, features a Perkins 4.236 inline 4-cylinder diesel engine with approximately 236 cubic inches of displacement, delivering around 60-70 PTO horsepower. Its engineering quality is evident in its durable build, designed for demanding work, and its straightforward mechanical systems contribute to its reputation for reliability. The D-19 Diesel was a significant contributor to agricultural mechanization during its production era. This Workshop Service Manual (WSM) provides comprehensive coverage of all aspects of the Allis-Chalmers D-19 Diesel tractor, including operation, maintenance, and repair. It details engine systems, drivetrain, hydraulic systems, steering and braking, and electrical components. The manual includes procedures for routine maintenance, troubleshooting common issues, and in-depth repair and rebuild instructions for all major systems. Technical specifications, diagnostic procedures, and safety guidelines are also thoroughly covered, making this an essential resource for owners, mechanics, and technicians seeking to maintain and repair the D-19 Diesel tractor effectively. 🏷️ Basic Information Identification Make: Allis-Chalmers Model: D-19 Model Designation: D-19 Diesel Product Type: Service Repair Manual Manual Abbreviation: WSM 👋 Introduction Market Position Segment: Agricultural tractor, utility tractor. Competitive Analysis Competitors: John Deere (e.g., 3020 series), International Harvester (e.g., 706 series), Ford (e.g., 4000/5000 series), Massey Ferguson (e.g., 165/175 series). Key Features Distinctive Features: Known for robust construction, reliable diesel power, and versatility for various farm tasks. 📋 Manual Details Coverage Areas Primary Coverage: All aspects of D-19 Diesel tractor operation, maintenance, and repair. Page Count Estimated Pages: Comprehensive (Exact count not provided, but implied to be extensive for WSM). Manual Type Type: Workshop Service Manual (WSM) Language Language: English Format Format: Likely printed manual (typical for WSM), potential for digital formats like PDF. 📖 Manual Coverage Systems Covered Engine Systems: Diesel engine overhaul, fuel system, lubrication system, cooling system, air intake system, exhaust system, starting system, electrical system (ignition, charging). Drivetrain Systems: Clutch, transmission (gearbox), differential, final drives, power take-off (PTO). Hydraulic Systems: Hydraulic pump, control valves, cylinders, remote hydraulic outlets, three-point hitch system. Steering And Braking: Steering system (mechanical/power assisted), brake system (mechanical/hydraulic), parking brake. Electrical Systems: Wiring diagrams, starter motor, alternator, battery, lighting, instrumentation. Chassis And Body: Frame, front axle, rear axle, fenders, operator's platform, controls. Procedures Included Maintenance: Routine lubrication, fluid changes, filter replacements, inspection points, scheduled maintenance intervals. Troubleshooting: Diagnostic charts, common problems and solutions, fault finding for all major systems. Repair And Rebuild: Component disassembly, assembly, overhaul procedures, torque specifications, tolerances, special tool requirements. Diagnostics: Engine performance testing, hydraulic pressure testing, electrical system checks. Technical Depth Depth: Comprehensive, covering from basic adjustments to full engine and transmission rebuilds. 📊 Manual Specifications File Format Format Details: Assuming a professional quality reprint or original manual, likely well-bound for shop use. Print Quality Quality: High-quality reproduction, designed for durability and readability in a workshop environment. Binding Type Binding: Professional binding (e.g., saddle-stitched, perfect bound, or spiral bound for shop use). Paper Type Paper Quality: Durable paper stock, resistant to grease and shop wear. ⚙️ Engine Specifications Primary Engine Make Model: Perkins 4.236 (common for D-19 Diesel). Engine Type: Inline 4-cylinder, naturally aspirated diesel. Displacement: Approximately 236 cubic inches (3.87 Liters). Performance Horsepower Rated: Around 60-70 PTO horsepower (varies slightly by specific configuration/testing). Torque Peak: Estimated peak torque in the range of 150-170 lb-ft. Fuel System Fuel Type: Diesel Fuel. Injection System: Typically rotary injection pump (e.g., CAV or Simms). 🔧 Transmission Standard Type: Manual transmission with multiple forward and reverse gears (e.g., 8-speed or 12-speed options). Optional Features: Possible range-shifting or live PTO configurations. Features Gear Ratios: Detailed gear ratios provided in WSM for performance analysis and troubleshooting. 📐 Dimensions Exterior Wheelbase: Approximately 85-90 inches. Length: Approximately 130-145 inches (excluding implements). Weights Operating Weight: Around 5,500 - 6,500 lbs (unballasted). Drawbar Pull: Capable of significant drawbar pull, dependent on traction and ballast. 🛡️ Safety Features Ratings Rollover Protection: ROPS (Roll-Over Protective Structure) may have been optional or a dealer add-on, not standard on all models of this era. Active Features Braking System: Service brakes (usually drum or disc, depending on rear axle configuration), parking brake. Passive Features Operator Station: Open operator station, safety considerations include guards and proper operating procedures detailed in the manual. 💡 Technology Features Infotainment Features: Basic operator controls, instrumentation (tachometer, oil pressure, coolant temp, ammeter). Driver Assistance Features: No modern driver assistance systems; focus on mechanical controls and operator awareness. Connectivity Features: None. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 100-150 operating hours, depending on operating conditions. Fuel Filter Replacement: Recommended at regular intervals (e.g., 250 hours) or when issues arise. Air Filter Service: Service based on operating environment (e.g., daily inspection in dusty conditions). Fluid Specifications Engine Oil...