2005 Polaris Sportsman 400 / 500 Service Manual (P/N 9919425)

This 311-page PDF contains Polaris's factory 2005 Sportsman 400/500 Service Manual, P/N 9919425. It covers the Sportsman 400 A05MH42 family with AB, AG, and AH suffixes, and the Sportsman 500 A05MH50 family with AB, AC, AG, and AH suffixes. The manual distinguishes the 400's 425cc EH42PLE05 engine, Mikuni BST 34 carburetor, and non-EBS PVT from the 500's 499cc EH50PLE13 engine, BST 40 carburetor, and EBS-equipped PVT. Its depth and tool requirements make it best suited to experienced ATV owners and working technicians who are already comfortable with factory repair procedures; Polaris specifically directs PVT clutch service to properly trained, certified Master Service Dealer technicians.

• Maintenance and setup: Covers the periodic service schedule, lubrication points, engine and driveline fluid service, compression testing, throttle/choke and ETC adjustment, valve clearance, transmission linkage, steering and toe alignment, brake inspection, suspension checks, and storage preparation.
• Engine repair: Provides EH42PLE/EH50PLE torque and service-data tables, engine removal, cooling-system pressure testing, oil-pressure testing and pump priming, cylinder and cylinder-head inspection, valve-seat work, cam timing, recoil starter service, and fault diagnosis. The detailed exploded view and internal top- and bottom-end overhaul sequence are identified as EH50PL coverage.
• Fuel and PVT systems: Details BST 34/BST 40 carburetor disassembly, cleaning, inspection, float adjustment, fuel-level and needle/seat leakage testing, fuel-pump service, and troubleshooting. The clutch chapter separates non-EBS and EBS drive/driven clutch inspection, disassembly, bushing replacement, belt service, alignment, and overheating diagnosis.
• Transmission and final drive: Takes the H/L/N/R/P transmission through removal, gear-cluster and shift-system disassembly, bearing and gear inspection, backlash setup, reassembly, installation, and troubleshooting. Centralized Hilliard AWD coverage adds front-gearcase diagnosis and overhaul, axle and CV-boot repair, U-joint service, hub work, and rear driveshaft service.
• Body, steering, suspension, and brakes: Shows body-panel, storage-box, rack, and cab removal; steering-post and A-arm work; front-strut cartridge and ball-joint replacement; and rear-suspension layout. Brake coverage includes hydraulic bleeding and fluid replacement, master-cylinder service, caliper overhaul, pad and disc work, burnishing, and brake-noise troubleshooting.
• Electrical diagnosis: Covers the gear-position switch, Sure Power ECM, instrument cluster and diagnostic mode, speedometer fault isolation, coolant-sensor and fan tests, ETC circuit, DC/CDI ignition, charging system, battery, lighting, fuel sender, starter motor, and starter-drive testing.

Factory Diagrams, Test Data, and Polaris Tools

Named visual references include the EH50PL Oil Flow Diagram, BST 34/BST 40 Carburetor Exploded Views, and Front Gearcase - Centralized Hilliard Exploded View. Other diagnostic material includes the Transmission Exploded View, Ignition System Testing Flow Chart, and the two-page 2005 Sportsman wiring diagram with its wire-termination table and 400/500 ignition details. These are backed by component-specific torque tables, fluid and lubricant data, inspection and wear limits, running clearances, clutch and jetting charts, and electrical test specifications.

Polaris tool callouts identify the Water Pump Mechanical Seal Puller (P/N 2872105), Valve Seat Reconditioning Kit (P/N 2200634), and Carburetor Float Adjustment Tool (P/N 2872314). The EBS Clutch Alignment Tool (P/N 2872292) and Shaft Drive Transmission & Front Gearcase Tool Kit (P/N 2871702) are also specified, along with other engine, suspension, brake, and electrical tools.

Service Scope and Component Cautions

This is a service and repair publication, not a parts catalog or a substitute for the Owner's Safety and Maintenance Manual; Polaris refers the reader to separate parts and owner's publications where those subjects apply.

Excessive flywheel-puller bolt engagement can damage the stator coils, while prying on transmission case sealing faces can damage those mating surfaces. Securely support the ATV before suspension, brake, transmission, or final-drive work, and account for stored spring force in clutch and shift-rail assemblies.