🏷️ Basic Information Identification Make: Allis-Chalmers Model: 616, 620, 720 Model Codes: 616, 620, 720 👋 Introduction Market Position Target Audience: Do-it-yourself owners and experienced mechanics seeking authoritative repair and maintenance information. Key Features Content Quality: Factory-written content with step-by-step instructions, highly detailed exploded pictures, and diagrams. Delivery Method: Instant PDF download upon purchase, eliminating shipping delays. Value Proposition Cost Effectiveness: An inexpensive way to keep the tractor working properly, reducing reliance on expensive professional services. 📋 Manual Details Coverage Areas Product Name: Allis Chalmers 616 620 720 Tractor Service Repair Manual Models Covered: Allis Chalmers 616, 620, 720 Tractors (all variants, engines, trims, transmission types) Page Count Estimated Page Count: Not explicitly stated, but described as 'complete' and covering 'every single detail' and 'complete disassembly' Manual Type Manual Type: Factory Service Repair Manual / Workshop Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Detailed coverage of engine systems, including overhaul, diagnostics, and component specifications. Fuel System: Comprehensive information on fuel delivery, injection (if applicable), carburetors, and associated components. Cooling System: Coverage of radiator, thermostat, water pump, hoses, and system maintenance. Lubrication System: Details on oil pump, filters, oil passages, and lubrication requirements. Ignition System: Information on spark plugs, ignition coils, distributors (if applicable), timing, and electrical components. Electrical System: In-depth coverage of starter, alternator/generator, battery, wiring diagrams, lighting, and instrument panels. Transmission: Detailed information on transmission types, operation, repair, and fluid specifications. Clutch: Coverage of clutch assembly, adjustment, and replacement procedures. Drive Axles: Information on front and rear drive axles, differentials, and associated components. Power Takeoff Pto: Details on PTO operation, maintenance, and repair. Hydraulic System: Coverage of hydraulic pump, cylinders, valves, filters, and fluid specifications for implement control. Steering System: Information on steering linkages, adjustments, and potential repair procedures. Braking System: Details on brake types, adjustment, maintenance, and repair. Front End Loader Fel: Likely includes information pertinent to FEL mounting, hydraulics, and operation specific to these tractor models. Chassis And Frame: Information on frame construction, integrity, and component mounting. Body And Sheet Metal: Guidance on panel removal, installation, and potential repair. Procedures Included Maintenance: Routine maintenance checks, lubrication points, and scheduled service recommendations. Troubleshooting: Diagnostic procedures for identifying and resolving common and uncommon issues. Repair: Detailed, step-by-step repair instructions for all major and minor components. Disassembly And Assembly: Complete breakdown and reassembly procedures for all tractor systems. Component Rebuild: Instructions for overhauling engines, transmissions, hydraulic pumps, etc. Adjustments: Procedures for adjusting clutch, brakes, PTO, linkages, and engine timing. Inspection: Guidelines for inspecting wear, damage, and component condition. Technical Depth Depth: Comprehensive (factory-level), covering detailed diagnostics, overhaul procedures, and technical specifications for both DIY enthusiasts and professional mechanics. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Printable without restriction. Graphic Quality: High-quality diagrams and instructions, with a recommendation for Adobe PDF Reader for optimal display of images/graphics. Binding Type Binding Type: Digital (PDF Download) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Likely 2 or 3-cylinder diesel engines, common for tractors of this era and class. Specific engine model numbers would be detailed within the manual. Performance Horsepower Range: Typically in the 16-25 HP range for the 616 and 620 models, and potentially higher for the 720, though specific figures depend on the exact engine variant and model year. Torque Specifications: Detailed torque specifications for engine components (head bolts, main bearings, etc.) will be provided in the manual. Fuel System Fuel Type: Diesel Fuel Pump Type: Likely rotary or inline injection pump, specific to engine model. Carburetor Details: If gasoline variants exist, carburetor models, specifications, and adjustment procedures will be covered. Cooling System Coolant Type: Standard ethylene glycol-based antifreeze (e.g., 50/50 mix with water) will be specified. Actual type and capacity will be in the manual. Lubrication System Engine Oil Grade: Likely a multi-viscosity oil such as SAE 10W-30 or 15W-40, depending on operating temperature. Specific API service classifications will be listed. Oil Capacity: Exact oil capacity (e.g., quarts or liters) for engine oil changes will be specified. Ignition System Spark Plug Gap: If gasoline engines are covered, the correct spark plug type and gap will be detailed. Ignition Timing: Specifications and procedures for setting ignition timing will be included. 🔧 Transmission Standard Transmission Type: Likely a manual transmission with multiple forward and reverse gears. Specific number of gears and PTO options will be detailed. Optional Transmission Options: May include variations in gear ratios or PTO configurations depending on the specific model and intended application. Features Transmission Fluid Type: Specifications for transmission and differential fluid (e.g., GL-4 gear oil, or specific tractor hydraulic fluid like Hy-Trans) will be provided. Clutch Type: Likely a single-plate dry clutch. Specifications for engagement and adjustment will be present. 📐 Dimensions Exterior Wheelbase: Specific wheelbase dimensions for each model...