🏷️ Basic Information

Make:

Jeep

Model:

CJ-6

Year:

1955

Chassis Code:

CJ-6

👋 Introduction

Segment:

Light Utility Vehicle / Off-Road Vehicle

Target Audience:

Military, government, agricultural, and recreational users requiring robust off-road capability.

Competitors:

Willys CJ series, Land Rover Series I, International Harvester Scout (later).

Durability:

Renowned for ruggedness and go-anywhere capability.

Versatility:

Adaptable for various roles from basic transport to specialized work.

4X4 Capability:

Standard four-wheel-drive system for superior off-road traction.

📋 Manual Details

Engine Repair:

Complete

Transmission Repair:

Complete

Suspension Repair:

Complete

Brake System Repair:

Complete

Electrical System Repair:

Complete

Body And Chassis Repair:

Complete

Maintenance Procedures:

Comprehensive

Troubleshooting Guide:

Included

Estimated Pages:

Over 500 (typical for comprehensive service manuals of this era)

Type:

Service Repair Workshop Manual

Language:

English

Format:

Digital (likely PDF, often provided as scans or digitally reproduced)

📖 Manual Coverage

Engine:

Engine assembly, disassembly, cylinder head, crankshaft, pistons, connecting rods, lubrication system, cooling system, fuel system (carburetor, fuel pump, lines), ignition system (distributor, spark plugs, ignition timing), exhaust system.

Transmission:

Manual transmission (e.g., T90 or equivalent), clutch system, driveshafts, transfer case (4x4 system).

Suspension:

Front and rear suspension components (leaf springs, shock absorbers), steering linkage, steering gear (worm and sector or similar), wheel alignment.

Brakes:

Hydraulic brake system (master cylinder, wheel cylinders, brake shoes, drums), parking brake system.

Electrical:

12-volt electrical system, battery, generator/alternator (depending on exact configuration), starter motor, lighting system (headlights, taillights, turn signals), instrumentation, wiring diagrams.

Chassis And Body:

Frame construction, body panels, doors, hood, windshield, seats, fuel tank, bumpers, fenders.

Engine Overhaul:

Detailed steps for complete engine rebuilding.

Transmission Rebuild:

Step-by-step instructions for transmission and transfer case overhaul.

Brake Service:

Drum brake relining, cylinder replacement, bleeding procedures.

Suspension Alignment:

Specifications and procedures for wheel alignment.

Electrical Troubleshooting:

Diagnostic procedures and wiring diagrams.

Tune Up Specifications:

Ignition timing, carburetor adjustments, valve clearance settings.

Depth:

Comprehensive: Covers everything from basic maintenance and tune-ups to full engine, transmission, and chassis overhauls. Suitable for professional mechanics and dedicated enthusiasts.

📊 Manual Specifications

Digital Format:

Likely PDF, potentially scanned from original print. Searchable text if OCR applied.

Scan Quality:

Varies based on original source, typically clear enough for practical use.

Original Binding:

Stapled or perfect bound (for print versions)

Original Paper:

Newsprint or standard paper (for print versions)

⚙️ Engine Specifications

Engine Type:

Inline 4-cylinder, Overhead Valve (OHV)

Engine Code:

F-Head Hurricane (F4-134)

Displacement:

2.2 Liters (134.2 cubic inches)

Bore X Stroke:

3-7/16 inches x 3-15/16 inches

Horsepower:

Approx. 75-80 hp @ 3200-3400 RPM (net)

Torque:

Approx. 114-120 lb-ft @ 1000-1200 RPM (net)

Fuel Delivery:

Single barrel downdraft carburetor (e.g., Carter WCD or similar).

Fuel Type:

Unleaded gasoline (though leaded was common and acceptable at the time)

Ignition Type:

Battery and Coil Ignition

Recommended Oil Viscosity:

SAE 20W-20 or SAE 30 (depending on ambient temperature, consult manual for specifics)

Oil Capacity:

5 Quarts (including filter)

Coolant Type:

Water and Ethylene Glycol (50/50 mix)

🔧 Transmission

Transmission Type:

3-speed manual transmission (e.g., T90)

Transfer Case:

2-speed transfer case with manual engagement for 4WD.

Gear Ratios Low Range:

Typically around 2.57:1 for low range

Transmission Fluid:

GL-4 Gear Oil (e.g., SAE 80W-90 or SAE 90)

Transmission Capacity:

Approx. 4-5 Pints (Manual Transmission)

Transfer Case Capacity:

Approx. 3 Pints (Transfer Case)

📐 Dimensions

Wheelbase:

104 inches (2642 mm)

Length:

Approx. 150 inches (3810 mm) (Varies slightly by body style/configuration)

Width:

Approx. 63 inches (1600 mm) (excluding mirrors)

Height:

Approx. 70 inches (1778 mm) (to top of windshield frame, without top)

Curb Weight:

Approx. 2,700 - 3,000 lbs (1225 - 1360 kg)

Gross Vehicle Weight Rating Gvw:

Approx. 3,750 lbs (1700 kg)

Standard Wheel Size:

16 inches

Wheel Bolt Pattern:

5 on 5.5 inches (139.7 mm)

Standard Tire Size:

6.00-16 or 6.50-16 (bias-ply)

🛡️ Safety Features

Crash Test Results:

Not applicable for this era of vehicle; safety standards were significantly different.

Braking System:

Four-wheel drum brakes.

Steering System:

Recirculating ball steering mechanism (non-power assist).

Body Construction:

Body-on-frame construction.

Seatbelts:

Typically not standard in 1955; often aftermarket or dealer-installed later.

💡 Technology Features

Radio:

Optional AM radio, typically with limited features. Often a single speaker.

Gauges:

Basic instrumentation: speedometer, fuel gauge, oil pressure gauge, water temperature gauge, ammeter.

ABS:

Not applicable

Traction Control:

Not applicable

Connectivity Options:

None

🔧 Maintenance

Oil Change Interval:

Every 2,500 - 3,000 miles or 6 months (typical for the era).

Tune Up Interval:

Every 6,000 - 12,000 miles or annually.

Spark Plug Replacement:

Every 10,000 - 15,000 miles.

Brake Fluid:

DOT 3 Hydraulic Brake Fluid.

Grease:

General Purpose Lithium Grease for chassis lubrication points.

Carburetor Performance:

Original Zenith or Carter carburetors can be finicky and require frequent adjustment or rebuilding.

Rust:

Body panels, floor pans, and frame are susceptible to rust due to age and exposure.

Leaf Springs:

Can develop fatigue and breakage over time, especially under heavy use.

Electrical Reliability:

Original wiring can degrade, leading to intermittent electrical issues.

📚 Vehicle History

Jeep Legacy:

Direct descendant of WWII Willys MB Jeep, known for military utility and off-road prowess.

Cj Lineage:

The CJ-6 was an extended wheelbase version of the CJ-5, offering more passenger and cargo space. Introduced in 1955.

Cj6 Specifics:

The CJ-6 was primarily produced for export and military/government contracts, though civilian sales occurred. It featured a 104-inch wheelbase compared to the CJ-5's 81 inches.

Production Period:

1955-1981 (CJ-6)

Manufacturer:

Willys-Overland, later Kaiser-Jeep, then AMC.

🏆 Awards & Recognition

Military Contracts:

While not formal 'awards,' Jeeps of this era were widely adopted by military forces globally, indicating reliability and utility.

Off Road Capability Rating:

Legendary; considered a benchmark for off-road vehicles.

Safety Certifications:

None by modern standards. Vehicles were built to engineering specifications of the time.