The Polaris Sportsman 400 HO is a versatile all-terrain vehicle (ATV) designed for a range of activities, from recreational trail riding to demanding work applications. Produced for the 2008, 2009, and 2010 model years, this ATV is recognized for its robust engineering, reliable performance, and user-friendly features. Key highlights include the Variable Transmission with engine braking, On-Demand True All-Wheel Drive (AWD) for superior traction, and an independent rear suspension system for a comfortable ride. Its substantial towing capacity and cargo rack capabilities make it a practical choice for various outdoor pursuits. This comprehensive workshop service manual provides essential information for the maintenance, diagnosis, and repair of the Polaris Sportsman 400 HO. It covers all major systems, including the engine, transmission, drivetrain, suspension, brakes, and electrical components, offering detailed procedures for routine servicing, component overhauls, and troubleshooting. With step-by-step instructions, diagnostic charts, and precise technical specifications, this manual is an indispensable resource for owners, technicians, and mechanics aiming to ensure the optimal performance and longevity of their vehicle. 🏷️ Basic Information Identification Make: Polaris Model: Sportsman 400 HO Model Variant: HO (High Output) Codes Product Code: 2008-2010_Sportsman_400_HO_Service_Manual_PDF 👋 Introduction Market Position Positioning: The Polaris Sportsman 400 HO was positioned as a capable and versatile mid-range ATV, offering a good balance of power, comfort, and utility for recreational riding, light trail work, and hunting expeditions. Competitive Analysis Competitors: Competed directly with models from Yamaha (Grizzly 450), Can-Am (Outlander 400), Arctic Cat (400 DVX/TRV), and Honda (Rancher 420 series). Key Features Features: Independent Rear Suspension (IRS), Polaris Variable Transmission (PVT) with engine braking, On-Demand True All-Wheel Drive (AWD), comfortable seating, robust chassis, accessory mounting options. 📋 Manual Details Coverage Areas Model Years Covered: 2008, 2009, 2010 Page Count Estimated Page Count: Approximately 400-600 pages (typical for a comprehensive ATV service manual of this era) Manual Type Manual Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Engine overhaul, top-end and bottom-end procedures, cooling system, lubrication, fuel delivery, ignition, starting system, exhaust system. Transmission: Automatic transmission (PVT - Polaris Variable Transmission) operation, maintenance, clutch service, belt inspection and replacement, gearbox disassembly and assembly. Drivetrain: All-Wheel Drive (AWD) system, front and rear differential, drive shafts, CV joints, final drive units. Suspension: Front and rear suspension systems, shock absorbers, springs, control arms, bushings, wheel bearings. Brakes: Hydraulic brake system, front and rear brake calipers, master cylinders, brake lines, brake pads, rotor maintenance. Electrical: Wiring diagrams, lighting system, battery, charging system (stator, regulator/rectifier), starter motor, ignition system, switches, relays, fuses, instrumentation. Steering: Steering system components, tie rods, steering linkage, handlebar assembly, potential for EPS (Electronic Power Steering) system coverage if applicable to specific trims. Chassis And Body: Frame inspection and repair, plastic body panels, racks, seat, mounting hardware. Procedures Included Maintenance: Routine service checks, oil changes, filter replacements, spark plug maintenance, lubrication points, battery care, tire pressure checks. Troubleshooting: Diagnostic charts and procedures for common problems related to engine, electrical, transmission, and other systems. Repair: Step-by-step instructions for disassembly, repair, and reassembly of all major vehicle components. Rebuild: Detailed procedures for complete engine and transmission rebuilds, including torque specifications and clearances. Technical Depth Depth: Comprehensive, covering basic maintenance to full engine and transmission overhauls, including electrical diagnostics. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Print Quality Print Quality: Designed for clear digital viewing and high-quality printing of individual pages or the entire document. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download - simulates high-quality paper for printing) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, Liquid-Cooled, Single-Cylinder Displacement: 375 cc (approximate, often rounded in marketing) Bore X Stroke: Refer to manual for exact specifications (typically around 83mm x 70mm for this engine family) Performance Horsepower: Estimated 20-25 HP (actual figures vary, manual will provide precise data) Torque: Refer to manual for exact specifications Fuel System Fuel Delivery: Carbureted (Keihin CV type, specific model to be confirmed in manual) Fuel Type: Unleaded Gasoline, Octane Rating 87 minimum Ignition Ignition System: CDI (Capacitor Discharge Ignition) Cooling System Cooling Type: Liquid Cooling Lubrication Oil Type: SAE 10W-40, API SG or higher (specific Polaris branded or equivalent recommended) Oil Capacity: Approximately 1.7 L (1.8 US qt) including filter (verify in manual) 🔧 Transmission Standard Transmission Type: Polaris Variable Transmission (PVT) Automatic with EBS (Engine Braking System) Gear Selection: High, Low, Neutral, Reverse, Park Drive System: Shaft Drive (to front and rear differentials) Features Ebs: Engine Braking System (EBS) for controlled descents. Fluid Type Transmission Fluid: Polaris AGL Synthetic Gearcase Lubricant (or equivalent as specified in manual) Fluid Capacity Gearcase Oil Capacity: Refer to manual (typically around 0.5 L for gearcase) 📐 Dimensions Exterior Length: Approx. 81 inches (205.7 cm) Width: Approx. 46 inches (116.8 cm) Height: Approx. 47 inches...