🏷️ Basic Information

Make:

Harley-Davidson

Model:

Softail

Model Year:

2008

Platform:

Softail

Vin Model Code:

Harley-Davidson VINs vary by model and year, but typically the 4th to 8th digits identify the model series and engine type.

👋 Introduction

Target Audience:

Primarily mechanical technicians, but also valuable for experienced DIY motorcycle enthusiasts seeking detailed service information.

Value Proposition:

Provides authoritative, factory-level repair information, essential for maintaining and troubleshooting complex Harley-Davidson motorcycles.

Manual Utility:

Facilitates accurate diagnosis, efficient repairs, and proper maintenance, reducing downtime and ensuring optimal performance.

📋 Manual Details

General Coverage:

Comprehensive service and repair procedures for all aspects of the 2008 Harley-Davidson Softail models.

Total Pages:

1086

Type:

Workshop Service Manual

Language:

English

File Format:

PDF

📖 Manual Coverage

Engine Systems:

Engine assembly, disassembly, tuning, fuel system, ignition system, lubrication, cooling (air-cooled specifics).

Transmission Drivetrain:

Clutch, primary drive, transmission (5-speed Cruise Drive), final drive (belt drive), servicing and repair.

Chassis Suspension:

Frame, front fork (e.g., 49mm Telescopic), rear suspension (shock absorbers, swingarm), steering.

Brakes:

Front and rear brake systems (calipers, rotors, master cylinders, brake lines), ABS (if equipped), hydraulic system maintenance.

Electrical Systems:

Wiring diagrams, battery, charging system (alternator, regulator), ignition system, lighting, instrumentation, starter system, security system (HISS).

Fuel System:

Fuel injection (EFI - Delphi), fuel pump, fuel lines, throttle body, sensors.

Exhaust System:

Exhaust pipes, mufflers, catalytic converters (if applicable), emission controls.

Bodywork Trim:

Fenders, fuel tank, seat, fairings (if applicable), controls, instrumentation, chrome and trim components.

Routine Maintenance:

Oil changes, filter replacements, chain adjustment (if applicable), tire pressure checks, lubrication points.

Diagnostic Procedures:

Troubleshooting guides, symptom-based diagnostics, error code interpretation, wiring diagram analysis.

Engine Rebuilding:

Complete engine teardown, component inspection, cylinder head service, piston and ring replacement, crankshaft and connecting rod service.

Transmission Service:

Gearbox inspection, bearing replacement, seal replacement, clutch pack servicing.

Suspension Fork Service:

Fork oil replacement, seal replacement, internal component service, shock absorber service.

Brake System Service:

Brake fluid bleeding, caliper rebuilding, master cylinder servicing, pad replacement, rotor inspection.

Electrical Troubleshooting:

Component testing, sensor diagnosis, wiring harness repair, diagnostic tool usage (e.g., P&T Module).

Fuel System Diagnostics:

Fuel pressure testing, injector cleaning, throttle body cleaning and adjustment, sensor calibration.

Bodywork Repair:

Panel removal and installation, fairing repair, seat adjustments, chrome component care.

Depth Level:

In-depth diagnostic and repair procedures suitable for professional technicians and advanced DIY mechanics.

Diagnostic Tools:

Mentions procedures for using Harley-Davidson's diagnostic tools (e.g., P&T Module) for fault finding.

Torque Specifications:

Detailed torque specifications for all critical fasteners and components.

Clearances Tolerances:

Specific engine and chassis clearances and tolerances for proper assembly and function.

📊 Manual Specifications

Searchability:

PDF format, typically with searchable text for easy navigation of topics.

Resolution:

High resolution, ensuring clear diagrams and text for printing or on-screen viewing.

Binding:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Family:

Twin Cam 96 (TC96)

Engine Type:

Air-cooled, 45-degree V-twin

Displacement:

96 cubic inches (1584 cc)

Bore X Stroke:

3.75 in. x 4.38 in. (95.25 mm x 111.25 mm)

Compression Ratio:

9.2:1 (typical for TC96)

Horsepower:

Approximately 75-80 HP (estimated, as Harley-Davidson typically quotes torque).

Torque:

Approximately 96 ft-lbs @ 3000 RPM (typical for TC96).

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI) with two injectors.

Fuel Type:

Unleaded gasoline, minimum 91 octane (RON+MON)/2. In some regions, 89 AKI might be acceptable, but 91+ is recommended.

Cylinder Heads:

Dual spark plug per cylinder for improved combustion.

Camshafts:

Hydraulic lifters, pushrods, and roller rocker arms. Specific cam profiles vary by model but are generally designed for broad torque delivery.

Cooling System:

Air-cooled via finned cylinders and heads, supplemented by oil cooler (often standard or optional).

🔧 Transmission

Transmission Type:

5-speed Cruise Drive Manual Transmission.

Optional Transmissions:

None for this model year and platform.

Gear Ratios:

Specific gear ratios are detailed within the manual, optimized for cruising and highway performance.

Primary Drive:

Outer primary chain drive, wet clutch.

Final Drive:

Belt drive with a 20mm wide belt (typically).

Transmission Fluid Type:

Harley-Davidson Formula Plus Transmission Lubricant, or equivalent meeting Harley-Davidson specification. Some riders use Syn3, but the manual will specify the recommended fluid.

Transmission Oil Capacity:

Approximately 1 quart (0.95 L) of transmission lubricant.

📐 Dimensions

Wheelbase:

Varies by specific Softail model (e.g., Fat Boy, Heritage Softail), typically around 64.5 - 67.5 inches.

Seat Height:

Varies by model, typically around 24 - 26 inches (unladen).

Dry Weight:

Varies by model, generally in the range of 650 - 700 lbs (295 - 318 kg).

Gross Vehicle Weight Rating:

Typically around 1160 lbs (526 kg) for most Softail models.

Fuel Capacity:

Typically 5.0 gallons (18.9 L) for most Softail models.

🛡️ Safety Features

Safety Certification:

Meets all applicable U.S. Federal Motor Vehicle Safety Standards (FMVSS) for motorcycles.

ABS:

Anti-lock Braking System (ABS) was an optional feature on many 2008 Softail models.

Lighting:

Halogen headlight, LED tail light, turn signals.

Horn:

Standard motorcycle horn.

💡 Technology Features

Audio System:

Some Softail models in 2008 may have offered optional or aftermarket audio systems, but it was not a standard feature on all variants. The manual would cover integration of factory-approved systems.

ABS:

ABS as an optional safety feature.

Diagnostics:

On-board diagnostics accessible via a service port, requiring specialized Harley-Davidson diagnostic tools for advanced troubleshooting.

Gauge Cluster:

Analog speedometer, tachometer (optional on some models), fuel gauge, oil pressure indicator, engine diagnostics indicator, and neutral indicator.

🔧 Maintenance

First Service:

Typically at 1,000 miles (1,600 km) for initial break-in service, including oil and filter change, primary chain adjustment, and general inspection.

Routine Maintenance Interval:

Every 5,000 miles (8,000 km) or annually, whichever comes first. This includes oil change, filter replacement, inspection of various components.

Major Service Interval:

Details for major services like transmission oil changes (every 10,000 miles) and other component checks are within the manual.

Engine Oil Type:

Harley-Davidson 20W-50 SYN3 Synthetic Motorcycle Oil, or equivalent meeting Harley-Davidson specification H-D 360.

Engine Oil Capacity:

Approximately 4 quarts (3.8 L) with filter change.

Primary Chain Case Oil:

Harley-Davidson Formula Plus, or equivalent meeting H-D specification.

Brake Fluid:

DOT 4 or DOT 5.1 brake fluid (check specific model recommendations within manual, typically DOT 4 for this era).

Common Wear Items:

Clutch plates, brake pads, fork seals, wheel bearings, and drive belt are common wear items requiring periodic inspection and replacement.

Engine Specifics:

Twin Cam engines can sometimes experience cam chain tensioner wear (especially earlier versions before hydraulic tensioners were standard) and occasional oil leaks from base seals or rocker boxes. The manual will cover inspection and repair of these.

Electrical Considerations:

Wiring harness integrity and proper ground connections are crucial for reliable electrical system operation. Issues with the starter solenoid or battery charging system are also noted in troubleshooting.

📚 Vehicle History

Brand Legacy:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich history in cruiser and touring motorcycles.

Softail Lineage:

The Softail platform, introduced in 1984, is renowned for its classic hardtail look with hidden rear suspension, providing a smooth ride.

2008 Updates:

The 2008 model year saw the widespread adoption of the Twin Cam 96 engine across the Softail line, along with refinements in styling and features like the 6-speed Cruise Drive transmission becoming standard on many models (though the manual specifies 5-speed, confirming older production or variations).

Manufacturing Location:

Harley-Davidson motorcycles are primarily manufactured in the United States, with assembly plants in York, Pennsylvania, and Milwaukee, Wisconsin.

🏆 Awards & Recognition

Model Acclaim:

Harley-Davidson Softail models are consistently recognized for their iconic styling, comfortable ride, and potent V-twin performance, making them enduringly popular in the cruiser market.