The 1986 Ford F250 Repair Manual provides comprehensive service and repair information for the 1986 model year Ford F-250 pickup truck. This manual covers engine systems (including 4.9L, 5.0L, 5.8L, 6.9L, and 7.5L engines), transmission, drivetrain, suspension, steering, brakes, electrical systems, body, and chassis components. Below are key sections for maintenance procedures, troubleshooting, specifications, and repair instructions.
Technical specifications for the 1986 Ford F250 including engine options, dimensions, capacities, and performance data.
| Specification | Details |
|---|---|
| Engine Options | 4.9L I6, 5.0L V8, 5.8L V8, 6.9L Diesel V8, 7.5L V8 |
| Transmission | 4-speed manual, 5-speed manual, 3-speed automatic, 4-speed automatic |
| Wheelbase | 133" Regular Cab, 155" SuperCab |
| Payload Capacity | 2,500-4,200 lbs depending on configuration |
| Fuel Capacity | 19-38 gallons depending on tank options |
| GVWR | 6,600-8,800 lbs |
| Brake System | Front disc, rear drum with power assist |
| Front Suspension | Twin I-beam with coil springs |
| Rear Suspension | Leaf spring with staggered shocks |
| Electrical System | 12-volt negative ground |
Recommended maintenance intervals for optimal performance and longevity.
WARNING! Always disconnect battery before performing electrical work. Use proper jack stands when lifting vehicle.
Comprehensive engine service procedures including removal, installation, and component replacement.
CAUTION! Engine components are heavy; use proper lifting equipment. Follow torque specifications precisely.
Complete brake system service including hydraulic components, pads, shoes, and troubleshooting.
Front Disc Brakes: Pad replacement, caliper service, rotor machining/replacement. Rear Drum Brakes: Shoe replacement, wheel cylinder service, adjustment procedures. Hydraulic System: Master cylinder, proportioning valve, brake line replacement. Parking Brake: Cable adjustment and component replacement.
Diagnosis and repair of electrical components, charging system, and accessories.
Tip: Use factory wiring diagrams for accurate circuit tracing and diagnosis.
Front and rear suspension service, alignment procedures, and steering component replacement.
WARNING! Always support vehicle properly with jack stands. Suspension components under tension can cause injury.
Radiator, water pump, thermostat, and cooling system maintenance.
Carburetor service, fuel pump replacement, tank cleaning, and emission controls.
CAUTION! Relieve fuel pressure before servicing. No smoking or open flames near fuel system work.
Common problems and diagnostic procedures for various systems.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel, spark, or compression issue | Check fuel pressure, spark plugs, compression test |
| Poor fuel economy | Carburetor adjustment, timing, dragging brakes | Tune-up, adjust carburetor, check brake drag |
| Brake pulling | Stuck caliper, contaminated pads, alignment | Service calipers, replace pads, check alignment |
| Transmission slipping | Low fluid, worn bands/clutches | Check fluid level and condition, internal inspection |
| Electrical issues | Bad grounds, corroded connections, failed components | Clean connections, test components, repair wiring |
Complete electrical schematics for engine management, lighting, accessories, and instrument panel.
Service Information: For additional support, contact Ford Motor Company or authorized dealership. Technical service bulletins available through Ford service network.