2009 Polaris Sportsman XP 850 / XP 850 EPS Service Manual (P/N 9921850)

• Covers the 2009 Polaris Sportsman XP 850 and XP 850 EPS with engine designation EH085OLE / EH085OLE011. Model-number coverage is A09ZN85AL, AQ, AS, AT, AX, FL for the base XP and A09ZX85AG, AL, AQ, AR, AS, AX, FS for EPS models.
• Engine repair coverage runs from in-chassis top-end work and oil-pressure testing through engine removal, cylinder-head and valve service, cam timing, crankcase teardown, oil-pump work, crankshaft bearing selection, and counterbalance timing.
• Transmission and PVT sections cover the H-L-N-R-P gearbox, removal and internal shaft service, drive-belt inspection, and drive and driven clutch disassembly, bushing service, clearance checks, reassembly, and troubleshooting for the EBS-equipped PVT system.
• Final-drive procedures address the Centralized Hilliard front gearcase, On-Demand AWD and Active Descent Control, front and rear gearcase teardown, ring-gear backlash, bearing and seal replacement, propshaft U-joints, CV joints and boots, plus ADC fluid bleeding.
• EFI and EPS material includes ECU fault-code diagnosis, Digital Wrench support, fuel-pump and injector testing, CPS, T-MAP, IAC, TPS, and ECT checks, TPS adjustment, and EPS unit removal, indexed installation, connector checks, and steering fault coverage.
• A two-page overall wiring diagram and 15 system-specific schematics cover AWD/ADC, charging, EFI, engine cranking, EPS, fuel pump and level, cooling fan, lighting, and related power circuits. Exploded assembly views, test charts, torque sequences, capacities, wear limits, clearances, and electrical test data support the repair chapters.

This 311-page PDF contains Polaris service-manual material identified as P/N 9921850. It reads like a shop manual, not an owner's handbook, and is best suited to technicians or experienced owners who understand ATV repair and have access to pullers, presses, meters, and pressure-test equipment. The manual specifically states that internal PVT repair is for a certified Polaris Master Service Dealer technician using factory-authorized clutch tools.

Maintenance, Engine, and Fuel Control

Routine coverage includes maintenance intervals, lubrication points, fluid and filter service, valve-clearance adjustment, compression and leakdown testing, toe alignment, suspension preload, and brake inspection. Cooling-system work covers pressure testing, bleeding, radiator removal, thermostat service, and water-pump seal and bearing replacement.

The EH085OLE engine chapter goes beyond top-end service. It provides inspection criteria and assembly data for the camshaft carrier, rocker arms, valve guides and seats, pistons, connecting rods, crankshaft, crankcase, oil pump, and balance shaft. Separate diagrams show oil flow, main-component torque sequences, sealant locations, and balance-shaft timing.

EFI diagnosis is organized around the Bosch multi-port sequential system and its ECU-controlled sensors and actuators. The text explains instrument-cluster trouble-code display, fuel-system fault isolation, sensor testing, injector circuits, and TPS setup. It also identifies important replacement limits: the ECU is sealed rather than internally repairable, a replacement ECU requires the correct calibration before startup, and the fuel-pump/tank unit is serviced as an assembly.

Drivetrain, Steering, and Brake Work

The transmission chapter includes removal, disassembly, shaft inspection, reassembly, installation, and a dedicated exploded view. Chassis repair extends through hubs and bearing carriers, drive shafts, propshafts, gearcases, body panels, A-arms, ball joints, stabilizer linkage, shocks, steering posts, and the EPS unit. Brake material covers bleeding, both master cylinders, caliper rebuilding, pad and disc inspection, burnishing, and brake-noise troubleshooting.

Tool callouts include the PU-43506-A fuel-pressure gauge with PS-48762 adapter, 2201519 TPS tester, PU-47063 Digital Wrench software with PU-47471 SmartLink hardware, PA-49318 crankshaft holding tool, and PA-48595 drive-clutch puller.

Wiring Diagrams and File Scope

Diagram coverage includes the engine oil-flow diagram, EFI layout and break-out circuits, transmission and Centralized Hilliard gearcase exploded views, EPS steering view, and hydraulic brake-system views. The wiring section supplies 16 diagram sets across 17 pages: one overall schematic spans two pages, followed by 15 circuit-specific sheets.

This file contains service Chapters 1 through 11 and the domestic wiring sheets, but it does not include the Chapter 12 electrical-service section referenced by the battery procedure. Its final page is a separate parts-catalog links sheet. Electrical repair coverage is therefore strongest for EFI diagnostics and the supplied schematics rather than full starting, charging, and instrument-system service procedures.

Two assembly traps deserve attention. The PVT drive-clutch shaft and retaining bolt use left-hand threads; treating them as conventional threads can damage the clutch hardware. During EPS work, striking the steering post can permanently damage the power-steering unit, while the eight-way connector can be inserted 180 degrees out and leave the unit inoperative. Support the ATV securely before under-chassis work, relieve EFI pressure before opening the fuel system, and allow the pressurized cooling system to cool before service.