2008 Harley-Davidson Dyna Super Glide, Low Rider, Wide Glide, Street Bob, and Fat Bob FXD, FXDC, FXDL, FXDWG, FXDB, FXDF Models Service Manual OEM (P/N 99481-08)

This 2008 Harley-Davidson Dyna Service Manual, P/N 99481-08, covers Super Glide, Super Glide Custom, Low Rider, Wide Glide 105th Anniversary, Street Bob and Fat Bob. It documents factory maintenance and repair procedures for the Twin Cam 96 powertrain and Dyna chassis.

Text search and wiring detail: Service text and wiring labels are searchable. Only two file-part bookmarks are embedded, with no chapter-level bookmarks; the second opens a notes page. Small connector numbers, pin labels and wire-color codes are legible when enlarged.

• Engine repair: Engine removal, top end overhauls, crankcase disassembly, camshaft service, oil-pump inspection, compression testing and cylinder leakdown testing.

• Primary drive and transmission: Clutch pack and bearing service, automatic chain tensioner replacement, six-speed gearset disassembly and main drive gear bearing replacement.

• Chassis and brakes: Wheel lacing and truing, front fork rebuilding, steering head bearing adjustment, master cylinder and caliper service, and brake bleeding.

• Fuel system: Fuel pump, filter and regulator service, injector replacement, fuel-pressure testing, intake leak testing and model-specific exhaust removal.

• Starter and electrical: Starter armature and field-coil testing, solenoid repair, charging-component replacement, handlebar switch repair and wiring-harness service.

• Factory references: Component torque tables, fluid capacities, service wear limits, electrical test specifications, connector repair instructions and model-specific wiring diagrams.

The maintenance sections suit owners with mechanical experience; major repair procedures are written for professional Harley-Davidson technicians with the specified service tools.

Twin Cam 96 Diagnosis and Internal Repair

The Compression Test Results table and cylinder leakdown test help distinguish ring, valve and head-gasket problems before teardown. Separate service tables identify work that can be done with the engine in the chassis and jobs requiring engine removal.

Internal procedures cover valve-guide replacement, valve-seat refacing, cylinder boring and honing, cam timing and crankshaft bearing replacement. Engine Oil Flow - Top End illustrates the lubrication path. Flywheel and connecting-rod service covers inspection and replacement of the complete assembly.

The rocker-housing gasket illustrations show how incorrect orientation can open the breather channel and cause a major oil leak, with possible engine damage.

Primary Drive and Six-Speed Transmission

Transmission Power Flow and gearset exploded views accompany mainshaft, countershaft, shifter-fork and bearing procedures. Separate final-drive specifications distinguish Japanese versions from domestic/HDI configurations.

The primary-drive instructions specify locking tool HD-47977 and warn that using HD-41214 can damage drive components.

Wheels, Forks and Brake Service

Wheel sections distinguish cast and laced assemblies, with separate lacing procedures for different rim sizes. Front and rear brake sections cover piston and seal inspection and replacement; steering service includes the fall-away bearing check and race replacement.

Fuel Injection and Exhaust Variants

Sensor procedures cover removal and installation of the Throttle Position Sensor (TPS), Idle Air Control (IAC) and Manifold Absolute Pressure (MAP) sensor. Separate FXDF exhaust procedures and HDI air-cleaner backplate service are included. The Schematic-CA Evaporative Emissions Control System identifies California canister plumbing.

Because Dyna service involves heavy components and high-pressure fuel, review the factory safety precautions and torque sequences before beginning work.

Electrical Service and Diagnostic Limits

The Electronic Control Module (ECM) and Turn Signal and Security Module (TSM/TSSM/HFSM) sections document replacement. Active Exhaust coverage includes module removal, shroud repair and cable routing, with separate FXDF illustrations.

Wiring sets distinguish FXD/FXDL/FXDB from FXDWG/FXDC/FXDF and identify domestic/international differences. Main Harness and Security Circuit sheets show connector IDs, pin assignments and wire colors. AMP, Deutsch, Molex and Packard sections cover terminal repair.

Separate diagnostic manual required: Detailed EFI and sensor diagnostics, plus ECM and security-module password learning, are referred to the Electrical Diagnostic Manual, which is not included. Idle-speed adjustment requires the dealer Digital Technician system, HD-44750.

PDF Contents and Included Reference Pages

This single, printable English-language 555-page PDF contains one cover page, 14 preliminary pages, 418 service-chapter pages, 100 appendix pages, six tool-reference pages, eight torque-reference pages, six index pages and two back-cover placeholders. Those totals already include section dividers, 17 notes pages and 22 pages containing repeated wiring captions without additional diagrams.