2009 Polaris Sportsman XP 550 & XP 550 EPS ATV Service Manual (P/N 9921830)

The 2009 Polaris Sportsman XP 550 and XP 550 EPS service manual, P/N 9921830, covers scheduled maintenance, EFI diagnosis, component repair and major assembly overhaul for these ES550PLE-powered ATVs.

Searchable Text and Bookmarked Wiring Sections

Navigation and drawing detail: Service text supports PDF search, while many labels within diagrams are not searchable. Embedded bookmarks cover the service chapters and both wiring sections. Small pin identifiers and wire codes require zooming for comfortable reading.

One printable English PDF contains 373 pages, including one cover page and five notes pages. The domestic and international wiring sections are included in that total.

Engine Overhaul, EFI Diagnosis and Drivetrain Service

These selected topics cover major workshop jobs; the manual also contains instrument-cluster diagnostic-mode functions and body-panel removal instructions.

• Engine repair: Engine removal, cylinder-head and crankcase disassembly, valve-clearance adjustment, cam timing, internal inspection and reassembly, with wear limits and fastener torque sequences.

• EFI diagnosis: Fuel-pump testing, Throttle Position Sensor (TPS) adjustment, ignition-coil resistance checks, SPN/FMI trouble-code tables and EFI system break-out diagrams.

• Cooling system: Pressure testing, thermostat checks, coolant bleeding, water-pump mechanical-seal replacement and shaft-oil-seal service.

• PVT and transmission: Step-by-step clutch disassembly, spider removal, drive-belt inspection and transmission overhaul, with shift-linkage and transmission-shaft service procedures.

• Final drive: Centralized Hilliard front gearcase service, AWD armature-plate inspection, Active Descent Control (ADC) fluid bleeding, rear gearcase repair and CV joint boot replacement.

• Steering and brakes: Electronic Power Steering (EPS) removal and installation, dual A-arm suspension service, alignment, master-cylinder and caliper repair, and hydraulic brake bleeding.

• Electrical troubleshooting: Charging and starter circuits, CAN diagnosis, separate early- and late-build AWD/ADC circuits, and domestic and international wiring diagrams.

The overhaul and electrical-test sections suit experienced technicians with workshop measuring equipment; the PVT chapter specifically calls for trained Polaris Master Service Dealer technicians.

Engine Disassembly and Cooling-System Repair

This workshop manual moves from scheduled maintenance charts to full engine disassembly, including cylinder-head torque sequences, crankshaft inspection and cam-chain installation. The Oil Flow Diagram connects the lubrication passages with the bearings and other components they supply.

The in-chassis service list distinguishes top-end and water-pump work from crankshaft and oil-pump jobs requiring engine removal. That distinction helps you plan access and the extent of the teardown before starting work.

The cooling chapter includes the 550cc Engine Coolant Flow diagram and identifies water-pump seal extractor 2872105 and seal installer 5131135.

The drive-coupler warning concerns the engine crankshaft’s single-use splined washer: reusing it can allow the coupler to loosen during operation.

EFI Tests and Diagnostic Equipment

The EFI control-unit section combines component tests with connector references and circuit diagrams, allowing electrical readings to be checked against the relevant wiring. TPS testing and adjustment use tester kit 2201519; T-MAP sensor testing calls for dealer-only Polaris Digital Wrench diagnostic software.

Fuel-system troubleshooting covers lean running, rich mixtures and unstable idle. The fuel pump and pressure regulator are treated as non-serviceable components, with tank-assembly replacement specified when they fail rather than internal rebuilding.

Clutch, Transmission and Gearcase Inspection

Clutch inspection extends to rollers, pins, thrust washers and EBS bushings. The Transmission Exploded View and front and rear gearcase exploded views show component relationships alongside assembly and torque references.

AWD diagnosis goes beyond coil checks to armature-plate wear patterns, coil seating and roll-cage inspection. Front gearcase service also includes ring-gear backlash adjustment, while drive-shaft procedures distinguish outer CV joints from inner plunging joints.

EPS, Suspension, Brakes and Electrical Circuits

Suspension coverage includes tie-rod ends, ball joints and shock/spring replacement. Brake sections distinguish hand and foot master cylinders and provide caliper inspection, disc wear checks and brake-system exploded views.

The EPS installation notes warn that the eight-way connector can fit backward and leave power steering inoperative. Separate AWD/ADC circuit references distinguish early and late builds; the Charging System Diagram and CAN troubleshooting section support electrical fault tracing.

For pressurized fuel and electrical work, follow the complete OEM procedures and workshop safety precautions before beginning diagnosis or teardown.

Selected Compression, Ignition and ECU Specifications

For the covered engine, the specification table lists compression pressure at 70–90 psi and an NGK BKR6E spark-plug gap of 0.035 in. (0.9 mm), illustrating the mechanical and ignition reference data included.

The EFI section specifies 7.0 volts as the ECU’s minimum operating voltage. This is an ECU operating threshold, rather than a battery-condition specification.