🏷️ Basic Information Identification Make: Allis-Chalmers Model: D-15 Type: Tractor 👋 Introduction Market Position Market Position: A versatile utility tractor designed for a wide range of agricultural and industrial tasks, positioned as a reliable workhorse in the mid-horsepower category. History Brand Heritage: Allis-Chalmers was a significant American manufacturer of agricultural and construction equipment, known for its innovation and quality. The D-series tractors were a cornerstone of their product line. Key Features Key Features: Robust construction, versatile power, optional Power Director transmission for on-the-go shifting, comfortable operator station, reliable engine options. 📋 Manual Details Coverage Coverage Areas: Engine, transmission, hydraulics, electrical system, steering, braking, chassis, bodywork, tune-up, troubleshooting, overhaul Documentation Page Count: Varies by specific publication, typically 300-500 pages Manual Type: Factory Service Repair Manual Language: English Format: Printed 📖 Manual Coverage Technical Areas Systems Covered: Engine (Gasoline & Diesel variants), Clutch, Transmission (4-speed constant mesh), Power Director (if equipped), PTO (Power Take-Off), Rear Axle and Differential, Final Drives, Hydraulics (Power-Lift, remote hydraulics), Steering System (Power-Assist), Braking System (Internal Expanding Shoe), Electrical System (12V DC, starter, generator, lighting), Cooling System, Fuel System, Ignition System (Gasoline), Starting System, Lubrication System, Front Axle, Sheet Metal and Body, Operator's Platform, Drawbar and Hitch Procedures Procedures Included: Routine maintenance, scheduled servicing, component disassembly and reassembly, troubleshooting guides, diagnostic procedures, electrical system testing, hydraulic system adjustments, engine tune-up procedures, complete overhaul instructions, torque specifications, repair techniques, component replacement, adjustment procedures, specifications for measurements and clearances Depth Technical Depth: Comprehensive, suitable for professional mechanics and skilled DIY enthusiasts. Covers from basic maintenance to complete engine and transmission rebuilds. 📊 Manual Specifications Physical File Format: N/A (Printed Manual) Print Quality: Professional, clear diagrams and text Binding Type: Often saddle-stitched or perfect bound Paper Type: Durable, semi-gloss paper suitable for workshop use ⚙️ Engine Specifications Primary Engine Primary Engine Gas: Allis-Chalmers G-149, 4-cylinder, overhead valve, gasoline Primary Engine Diesel: Allis-Chalmers 2500 Series Diesel, 3-cylinder, direct injection, diesel Performance Displacement Gas: 149 cubic inches (2.45 Liters) Displacement Diesel: Not explicitly stated in product description, but typically around 152 cubic inches for similar models. Horsepower Gas: Approx. 45 belt horsepower, 40 drawbar horsepower Horsepower Diesel: Approx. 50 belt horsepower, 45 drawbar horsepower Fuel System Fuel System Gas: Carburetor (e.g., Marvel-Schebler), Fuel pump Fuel System Diesel: Injection pump (e.g., Roosa Master), Injectors, Fuel filter Cooling Cooling System: Pressurized, water-cooled with fan and radiator Lubrication Lubrication System: Forced lubrication with oil pump, oil filter 🔧 Transmission Standard Standard Transmission: 4-speed constant mesh gearbox Optional Optional Transmission: Allis-Chalmers Power Director (a clutch-assisted powershift for 4 gears, effectively providing 8 forward and 2 reverse speeds) Features Transmission Features: Robust gear trains, designed for heavy-duty agricultural use. Power Director significantly enhances operational efficiency and versatility. Fluid Transmission Fluid Spec: Refer to manual for specific fluid type; typically API GL-4 gear oil or a universal tractor transmission fluid (UTTF) suitable for hydraulics and wet brakes. Capacity varies. 📐 Dimensions Exterior Wheelbase: Approximately 76 inches (1930 mm) Overall Length: Approximately 115 inches (2921 mm) without cultivators Overall Width: Approximately 65 inches (1651 mm) at rear tread Weights Shipping Weight: Approximately 3,500 - 4,000 lbs (1588 - 1814 kg), depending on configuration Operating Weight: Up to 5,000+ lbs (2268+ kg) with fluids and ballast 🛡️ Safety Features Ratings Safety Ratings: Not applicable in the modern sense of automotive crash test ratings. Focus is on mechanical safety and operator protection. Active Features Active Features: Brakes (Internal Expanding Shoe), PTO Clutch/Brake, Steering System (Manual or Power-Assist) Passive Features Passive Features: Operator platform, fenders, drawbar for implement attachment, optional ROPS (Roll-Over Protective Structure) may be available or retrofitted. 💡 Technology Features Infotainment Infotainment Features: N/A - Basic tractor instrumentation (tachometer, oil pressure, temperature, fuel gauge, ammeter). Driver Assistance Driver Assistance Features: Power-assist steering (optional), adjustable seat, operator controls. Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Engine Oil Change Interval: Typically every 50 operating hours or annually. Refer to manual for specific recommendation. Transmission Fluid Change Interval: Typically every 500 operating hours or annually. Refer to manual. Air Filter Maintenance: Check and clean/replace based on operating conditions, typically every 25-50 operating hours. Fluid Specifications Engine Oil Specification: Refer to manual for specific API service classification and viscosity grade (e.g., SAE 30 or 10W-30 depending on temperature). Diesel engines may require specific diesel engine oil. Coolant Specification: Ethylene glycol based antifreeze/coolant. Mixture ratio typically 50/50 with distilled water. Hydraulic Fluid Specification: Refer to manual. May be same as transmission fluid (UTTF) or a specific hydraulic oil. Check for compatibility with wet brakes. Known Issues Common Issues: Worn clutch components, leaking hydraulic seals, carburetor issues (gasoline), injection pump problems (diesel), starter motor wear, electrical component corrosion, PTO clutch adjustment. Troubleshooting Troubleshooting Focus: The manual provides detailed guides for diagnosing and resolving common operational problems across all systems. 📚 Vehicle History Brand Heritage Brand History:...