The Allis-Chalmers D-15 is a robust utility tractor, produced from approximately 1957 to 1967. Designed for a wide range of agricultural and property maintenance tasks, this model is recognized for its durable construction and reliability in demanding environments. Featuring a liquid-cooled inline 4-cylinder engine, available in gasoline or diesel variants, and a manual transmission with typically six forward and two reverse gears, the D-15 offers practical performance for its intended use. Its utility is further enhanced by features such as a 540 RPM Power Take-Off (PTO) and a rear differential lock for improved traction, making it a dependable workhorse for farmers, property owners, and collectors. This comprehensive service repair manual provides detailed guidance for the maintenance and repair of the Allis-Chalmers D-15 tractor. It covers essential areas including engine mechanicals, fuel, cooling, lubrication, transmission, hydraulics, electrical systems, steering, brakes, chassis, and bodywork. The manual offers step-by-step instructions for routine maintenance, troubleshooting common issues, and complete component overhauls, alongside crucial technical specifications such as torque values and fluid capacities. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the longevity and optimal performance of their Allis-Chalmers D-15 tractor. 🏷️ Basic Information Identification Make: Allis-Chalmers Model: D-15 Product Type: Service Repair Manual Format: PDF Download 👋 Introduction Market Position Vehicle Type: Utility Tractor Target Audience: Farmers, property owners, collectors, and mechanics seeking to maintain or restore the Allis-Chalmers D-15. Key Features Utility: Designed for a wide range of agricultural and property maintenance tasks. Reliability: Known for its robust construction and durability in demanding conditions. 📋 Manual Details Coverage Areas Primary Coverage: Complete service and repair for the Allis-Chalmers D-15 Tractor Specific Systems Covered: Engine, transmission, hydraulics, electrical system, steering, brakes, chassis, bodywork Page Count Estimated Pages: 400+ Manual Type Type: Service Manual / Workshop Manual Language Language: English 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed disassembly, inspection, repair, and reassembly of engine components including cylinder head, pistons, rings, crankshaft, camshaft, valve train, and timing. Fuel System: Carburetor service, fuel pump, fuel lines, fuel filters, and related components. Cooling System: Radiator, water pump, thermostat, hoses, and fan assembly maintenance and repair. Lubrication System: Oil pump, oil filter, oil passages, and lubrication intervals. Transmission Manual: Disassembly, repair, and adjustment of the manual transmission, including clutch service. Transmission Power Steering: Hydraulic power steering system diagnosis and repair, including pump, cylinder, and linkages. Hydraulics Power Take Off: PTO engagement, repair, and hydraulic system for implement control. Hydraulics 3 Point Hitch: Three-point hitch mechanism, hydraulic lift, control valve, and cylinder maintenance. Electrical System: Starting system (starter motor, battery), charging system (generator/alternator), ignition system (distributor, spark plugs, coils), lighting, and wiring diagrams. Steering System: Steering wheel, steering column, tie rods, and linkages. Brake System: Brake pedal, master cylinder, brake lines, wheel cylinders, and brake shoe adjustment/replacement. Chassis And Suspension: Front axle, rear axle, and general chassis components. Bodywork And Fenders: Sheet metal, fenders, operator platform, and trim. Procedures Included Maintenance: Routine maintenance tasks, lubrication points, filter changes, fluid checks and changes, and general upkeep. Troubleshooting: Systematic diagnostic procedures for identifying and resolving common and uncommon problems. Repair Overhaul: Step-by-step instructions for complete disassembly, inspection, measurement, repair, and reassembly of all major components and systems. Adjustments: Specific procedures for adjusting brakes, clutch, carburetor, ignition timing, and hydraulic controls. Technical Specifications: Torque values, clearance specifications, timing settings, fluid capacities, and other critical data. Technical Depth Depth: Comprehensive, covering everything from basic daily checks to complete engine and transmission rebuilds. Diagnostic Aid: Includes diagnostic charts and symptom-based troubleshooting guides. 📊 Manual Specifications File Format Format: Digital PDF Searchable: Yes (text-searchable PDF) Print Quality Quality: High-resolution scans for clear text and diagrams Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Make: Allis-Chalmers Model: G-149 (Gasoline) / D-15 Diesel (Diesel variant) Configuration: Inline 4-cylinder, gasoline or diesel Displacement Gas: 149 cubic inches (2.44 Liters) Bore Gas: 3.75 inches Stroke Gas: 4.00 inches Performance Horsepower Gas: Approx. 35 PTO HP (rated) Torque Gas: Variable based on RPM, typically higher in mid-range. Fuel System Carburetor: Single barrel (e.g., Marvel-Schebler) Fuel Type: Gasoline / Diesel (depending on variant) Ignition System Ignition Type: Distributor-based ignition system Cooling System Cooling Method: Liquid-cooled 🔧 Transmission Standard Type: Manual Transmission Gears: Typically 6 forward speeds and 2 reverse speeds Clutch: Single-plate, dry clutch Optional Power Take Off: 540 RPM Power Take-Off (PTO) Features Differential Lock: Rear differential lock for improved traction 📐 Dimensions Exterior Wheelbase: Approximately 77 inches Overall Length: Approximately 120-130 inches Weights Operating Weight: Approximately 3,500 - 4,500 lbs (depending on configuration) Tires Front Tire Size: Commonly 5.50-16 or 6.00-16 Rear Tire Size: Commonly 13.6-28 or 14.9-24 🛡️ Safety Features Ratings Tractor Safety: Standard safety features of the era, emphasis on operator awareness and proper operation. Not subject to modern ROPS/FOPS regulations. Active Features Brakes:...