🏷️ Basic Information Identification Make: Yanmar Model: YM155 / YM155D Product Type: Tractor Service Repair Workshop Manual 👋 Introduction Market Position Target Audience: Independent mechanics, farm owners, agricultural professionals, and DIY enthusiasts with mechanical aptitude seeking factory-level repair information. Competitive Analysis Advantage: Provides vehicle-specific, dealer-level technical data, ensuring accuracy and completeness unlike generic repair guides. Key Features Content Highlight: Includes step-by-step instructions, detailed diagrams, illustrations, wiring schematics, and essential specifications for diagnosis and repair. 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and troubleshooting for Yanmar YM155 and YM155D tractors. Page Count Estimated Page Count: Varies by specific edition, but designed to be comprehensive. Typical for workshop manuals of this era and complexity can range from 300-800+ pages. Manual Type Type: Service Repair Workshop Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine: Engine overhaul, troubleshooting, fuel system, cooling system, lubrication system, ignition/starting system, emissions control (if applicable). Transmission: Manual and/or powershift transmission repair, clutch system, drivetrain components (propshafts, differentials, axles). Hydraulics: Hydraulic system components, pump, cylinder, control valves, power take-off (PTO) hydraulics, hitch control. Electrical: Wiring diagrams, charging system, starting system, lighting, gauges, starter motor, alternator, battery service. Chassis And Body: Frame, front axle, steering system, braking system, wheels, tires, body panels, operator station, fenders. Steering System: Mechanical steering system, linkage, tie rods, steering arms, and potential power steering components (if equipped). Specific lubrication and adjustment points. Braking System: Detailed procedures for brake shoe inspection, adjustment, relining, and pedal free play. Cooling System: Radiator, fan, water pump, thermostat, hoses, and coolant recovery system diagnosis and repair. Exhaust System: Muffler, exhaust manifold, and pipe inspection and replacement. Operator Controls: Detailed explanation and repair procedures for steering wheel, brake pedals, clutch pedal, gear levers, throttle control, and PTO engagement. Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, lubrication points, inspections. Troubleshooting: Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting charts. Repair: Step-by-step repair instructions for all major components and systems, including disassembly, cleaning, inspection, and reassembly. Adjustment: Precise adjustment procedures for engine timing, valve clearance, brake systems, clutch engagement, and hydraulic controls. Engine Rebuild: Comprehensive engine overhaul procedures, including cylinder head removal/installation, piston and ring replacement, crankshaft and bearing service, camshaft and valve train servicing. Hydraulic Component Service: Detailed disassembly, inspection, and reassembly of hydraulic pump, control valves, cylinders, and filters. Includes troubleshooting for common hydraulic faults. Wiring Harness Repair: Instructions for tracing and repairing faults within the tractor's electrical wiring harness, including connector identification. Technical Depth Depth: Detailed technical specifications, torque values, clearances, tolerances, and diagnostic data equivalent to dealer-level service. Diagnostic Charts: Includes comprehensive diagnostic charts that correlate symptoms to potential causes and repair procedures. Schematics: Clear, detailed wiring diagrams and hydraulic schematics for accurate troubleshooting and repair of electrical and hydraulic systems. 📊 Manual Specifications File Format Readability: Optimized for viewing on PC, Mac, and compatible mobile devices/e-readers, ensuring clarity and legibility. Print Quality Printable: Yes, individual pages can be printed for on-the-job use, allowing users to keep originals clean. Binding Type Binding Description: Digital format (PDF) eliminates the need for traditional binding; printable pages offer flexibility. Paper Type Paper Type Description: N/A (Digital Format) - Printing allows for user choice of paper type for durability. ⚙️ Engine Specifications Primary Engine Engine Model: Typically Yanmar 3T72 Series (or similar displacement diesel engine for this class of tractor). Specific engine code would be present in the manual. Performance Horsepower Range: Likely in the 15-20 HP range, depending on specific configuration (e.g., YM155 vs. YM155D which often indicates 2WD vs. 4WD and potentially slight power variations). Fuel System Fuel Type: Diesel Injection System: Direct injection, rotary or inline injection pump. Manual will detail specific pump type and timing. Cooling System Cooling Type: Liquid-cooled (radiator, fan, coolant pump). Lubrication System Oil Type: Diesel engine oil, specific viscosity (e.g., SAE 10W-30 or 15W-40) and API classification will be detailed. Engine Dimensions Bore And Stroke: Specific bore and stroke dimensions for pistons and cylinders will be listed, crucial for engine rebuilds and parts identification. Engine Specifications Valve Clearance: Precise cold and hot valve clearance specifications for intake and exhaust valves. Compression Ratio: Engine compression ratio, along with acceptable minimum and maximum compression pressure ranges during testing. Timing Specifications: Engine timing specifications, including injection pump timing and ignition timing (if applicable for gasoline variants, but typically diesel here). 🔧 Transmission Standard Transmission Type: Likely a 3-speed or 4-speed main gearbox with a 2-speed transfer case (e.g., 12 forward, 4 reverse speeds or similar range). Optional Optional Features: Differential lock may be standard or optional depending on YM155 vs. YM155D designation and specific build. Features Power Take Off: Live PTO, typically 540 RPM, may have a secondary PTO option. Manual covers PTO engagement and maintenance. Clutch: Dry single or dual-plate clutch, with adjustment and replacement procedures...