2004 Polaris Ranger 425, 500, TM 2x4, 4x4, 6x6 Factory Service Manual (P/N 9918796)

• Exact 2004 coverage: Covers the Ranger TM (A04RB63AA), Ranger 425 2x4 (A04RB42AA), Ranger 500 4x4 (A04RD50AA), and Ranger 6x6 (A04RF50AA). This 432-page PDF matches the cataloged Polaris Service Manual P/N 9918796, with separate material for the Robin EH63PFE010 and Fuji EH42PLE083/EH50PLE164 engines.
• Engine repair procedures: Documents engine removal and installation, top-end service, cylinder and crankshaft inspection, lubrication-system work, valve and cylinder-head service, and reassembly. The EH42/EH50 section adds bottom-end teardown, cooling-system pressure testing, water-pump service, counterbalancer inspection, and sealed-recoil repair.
• Fuel and PVT service: Separates the TM's Nikki downdraft carburetor from the Mikuni BST 34 CV system used on the 2x4, 4x4, and 6x6. Carburetor disassembly, cleaning, inspection, fuel-level and leakage tests, jetting charts, PVT teardown, clutch inspection, bushing service, belt setup, alignment, offset, and overheating diagnosis are covered.
• Transmission and final-drive repair: Provides removal, internal disassembly, inspection, reassembly, linkage adjustment, and troubleshooting for the TM and 2x4/4x4/6x6 transmissions, then follows the driveline through front hubs, CV boots, prop shafts, U-joints, front gearcase diagnosis, rear differentials, and the 6x6 mid-drive system.
• Chassis and brake work: Covers body and cargo-box removal, A-arm and swingarm replacement, strut and ball-joint service, steering and toe adjustment, hydraulic brake bleeding, disc inspection, and front and rear caliper overhaul.
• Electrical diagnosis and diagrams: Treats the TM ECM/starter logic separately from the 2x4/4x4/6x6 DC/CDI ignition and cooling-fan circuits. Charging, ignition, starter, coolant-sensor, fan-motor, gear-indicator, and optional electric box-lift tests are backed by flowcharts and model-specific wiring diagrams.

Separate TM and 425/500 Systems

The TM is mechanically distinct from the other Rangers in this book. It uses the air-cooled 653cc Robin EH63 V-twin, a wet-sump lubrication system, Nikki carburetion, its own PVT hardware, and a high/reverse drivetrain. The 2x4 uses the liquid-cooled 425cc Fuji EH42 single, while the 4x4 and 6x6 use the 499cc Fuji EH50 single. Those three models share Mikuni CV carburetion and related engine architecture, but their clutch calibration, transmissions, front-drive hardware, and final-drive layouts are handled by application.

This is shop-level material suited to professional technicians and experienced mechanics with the specified measuring and pulling equipment; Polaris expressly reserves PVT disassembly and repair for trained Master Service Dealer technicians using factory-authorized tools.

Engine, Transmission, and Final-Drive Procedures

The EH63 chapter addresses crankshaft runout, cylinder honing, oil-flow routing, top-end teardown, service-data checks, assembly, and installation checks. EH42/EH50 coverage reaches farther into the bottom end, with cam-chain timing, valve-seat reconditioning, crankcase and bearing work, crankshaft and counterbalancer end play, oil-pump inspection and priming, water-pump seals, and cooling-system troubleshooting.

Drivetrain material is equally specific. The transmission chapters cover shift drums, forks, engagement dogs, shafts, silent chains, seals, and final operational troubleshooting. Final-drive coverage distinguishes the TM/2x4 front hubs from the driven hubs on 4x4 and 6x6 machines, then gives the 6x6 its own mid-hub, mid-shaft, and mid-gearcase repair sections. Brake work extends from hydraulic operation and bleeding to pad and disc wear limits, master-cylinder operation, and caliper inspection and repair.

Diagrams, Tools, and Repair Cautions

Named visual references include the EH63 engine lubrication/oil-flow view, the Mikuni BST 34 fuel-flow diagram, PVT drive/driven-clutch exploded views, the 4x4/6x6 front-gearcase exploded view, charging- and ignition-system diagnostic flowcharts, and dedicated wiring diagrams for the 2004 Ranger TM and the 2x4/4x4/6x6 group.

Tool references are application-specific. Examples include the TM PVT alignment tool PA-47043, standard clutch offset alignment tool 2870654, crankshaft/water-pump seal installation kit 2871283, Mity Vac pressure-test tool 2870975, and Fluke 77 digital multimeter PV-43568.

The EH42/EH50 flywheel procedure warns that threading the puller bolts too deeply can damage the stator coils. On the 6x6 mid driveshaft, losing the indexed relationship between the yokes and grease fittings can create vibration and lead to premature U-joint failure.

Torque tables, capacities, pressure-test data, wear limits, clearances, jetting and clutch charts, and electrical test values appear throughout the manual. This publication does not replace the model-correct parts manual, which Polaris specifies for service-part selection and certain fastener applications. Securely support the vehicle for suspension and final-drive work, and follow the manual's fuel, brake-fluid, battery, and rotating-PVT precautions before beginning any repair.