Historical Context:
The Jeep CJ-6 was a long-wheelbase variant of the CJ series, offering greater utility and cargo space, appealing to a segment seeking more robust off-road capability and passenger/cargo hauling.
Competitors 1965:
While the CJ-5 was more direct competitor to smaller utility vehicles, the CJ-6 competed with other utility vehicles and some early SUVs from manufacturers like International Harvester (e.g., Scout) and potentially early offerings from Ford and Chevrolet in civilian guise.
Vehicle Essence:
Rugged, utilitarian, go-anywhere capability, classic Jeep styling, robust mechanicals.
Importance For Restoration:
Essential for owners undertaking restoration projects, ensuring accurate reassembly, maintenance, and troubleshooting of these iconic vehicles.
Utility For Mechanics:
Provides the authoritative technical information mechanics and experienced DIY enthusiasts require to service and repair the Jeep CJ-6.
Engine Mechanical:
Engine assembly, disassembly, overhaul, specifications, tuning
Fuel System:
Carburetor service (e.g., Carter WCD, WLB), fuel pump, fuel lines, tank
Ignition System:
Distributor, ignition timing, spark plugs, coil, wiring
Transmission Manual:
T90 3-speed manual transmission overhaul, adjustments, specifications
Transfer Case:
Dana 18 transfer case service and repair
Axles:
Dana 25 (front) and Dana 44 (rear) axle overhaul, bearings, seals, differentials
Suspension:
Leaf spring front and rear suspension, shock absorbers, bushings
Steering:
Steering box, linkage, column, kingpins
Brakes:
Drum brake system, master cylinder, wheel cylinders, brake lines, adjustment
Electrical:
Wiring diagrams, starter motor, generator, battery, lighting, gauges, switches
Body:
Sheet metal repair, doors, hood, windshield frame, body mounts
Cooling System:
Radiator, water pump, thermostat, hoses, fan
Exhaust System:
Manifold, exhaust pipe, muffler, tailpipe
Tune Up:
Step-by-step tune-up procedures, specifications, and adjustments
Engine Rebuild:
Complete engine disassembly, inspection, repair, and reassembly instructions
Transmission Overhaul:
Detailed procedures for rebuilding the T90 manual transmission
Brake Adjustment:
Proper procedures for adjusting drum brakes
Electrical Diagnostics:
Troubleshooting electrical issues using wiring diagrams and common fault finding
Wheel Bearing Service:
Front and rear wheel bearing inspection, repacking, and adjustment
Clutch Replacement:
Procedures for clutch disc, pressure plate, and throw-out bearing replacement
Shock ABSorber Replacement:
Instructions for replacing front and rear shock absorbers
Steering Box Adjustment:
Procedures for adjusting steering box play
Carburetor Adjustment:
Detailed instructions for tuning and adjusting common carburetor models
Depth:
Comprehensive, covering from basic maintenance to complete component overhaul and diagnostics
Engine Code:
F-Head Hurricane (4-99)
Engine Type:
Inline 4-cylinder, Overhead Valve (OHV)
Displacement Liters:
2.2 L
Displacement Ci:
134 cu in
Bore X Stroke In:
3.125 x 4.375 in
Compression Ratio:
Approx. 6.9:1
Horsepower Gross Bhp:
75 bhp @ 3200 rpm (approx.)
Torque Gross Lb Ft:
120 lb-ft @ 1600 rpm (approx.)
Carburetor:
Single-barrel Carter WCD or WLB
Fuel Type:
Unleaded Gasoline (Octane rating appropriate for the era)
Cooling Type:
Water-cooled
Oil Capacity Us Qt:
5 US qt (with filter)
Recommended Oil Viscosity:
SAE 10W-30 or SAE 30 (depending on climate)
Oil Change Interval Miles:
Every 3,000 miles or 6 months (typical for the era)
Tune Up Interval Miles:
Every 10,000 - 15,000 miles
Transmission Fluid Change Miles:
Every 20,000 - 30,000 miles or annually
Differential Fluid Change Miles:
Every 20,000 - 30,000 miles or annually
Coolant Type:
Ethylene Glycol based antifreeze (e.g., 50/50 mix with water)
Brake Fluid Type:
DOT 3 Brake Fluid
Grease Type:
Multi-purpose Lithium Grease for chassis lubrication points
Common Wear Items:
Leaf spring bushings, kingpins, clutch wear, carburetor leaks, electrical connections (corrosion), exhaust system rust, brake drum wear.
Frame And Body Corrosion:
Rust is a common concern on the frame and body panels, especially in coastal or humid environments.
Chassis Lubrication:
Critical importance of regular chassis lubrication at all grease fittings (ball joints, tie rod ends, U-joints, steering components).
Jeep Legacy:
Rooted in military vehicles (Willys MB), the civilian CJ line evolved from this utilitarian platform, emphasizing off-road prowess and durability.
Cj Series Timeline:
The CJ-6 was introduced in 1955 alongside the CJ-5, but remained in production longer in some markets. It featured a longer wheelbase to accommodate more passengers or cargo.
Production Years Cj6:
1955-1975 (overall for CJ-6, but this manual specifically targets 1965 variants)
Manufacturing Location:
Toledo, Ohio, USA (Willys-Overland/Kaiser Jeep)
Historic Significance:
The CJ-6 represents a significant chapter in the evolution of the civilian Jeep, embodying its core values of ruggedness and capability for extended periods.
Off Road Capability:
Renowned for exceptional off-road capability due to its robust chassis, 4WD system, and excellent approach/departure angles.
Industry Standards Adherence:
Manual adheres to technical documentation standards of its time, providing factory-level repair information.