The 1988 International Truck Manual provides comprehensive technical information, maintenance procedures, and operational guidelines for International Harvester trucks manufactured in 1988. This manual covers engine systems, transmission, braking, electrical systems, chassis, and routine maintenance schedules for various International truck models from that year. Below are key sections for specifications, maintenance, troubleshooting, and operational procedures.
Key specifications for 1988 International Truck models including engine options, dimensions, and capacity ratings.
| Specification | Description |
|---|---|
| Engine Options | DT466 diesel, 7.3L V8 diesel, 6.9L IDI diesel |
| Horsepower Range | 170-230 HP depending on engine configuration |
| Transmission | 5-speed manual, 6-speed manual, Allison automatic options |
| GVWR | 16,000-33,000 lbs depending on model |
| Wheelbase | 134-254 inches |
| Fuel Capacity | 50-100 gallons |
| Cab Configuration | Conventional cab, crew cab options |
| Braking System | Air brakes standard on heavier models |
| Electrical System | 12-volt DC, negative ground |
| Suspension | Leaf spring front and rear |
Detailed information on engine components, maintenance procedures, and specifications.
WARNING! Engine components operate at high temperatures; allow cooling before servicing. Use proper safety equipment.
Transmission types, maintenance intervals, and drivetrain components.
CAUTION! Ensure transmission is in neutral and parking brake engaged before servicing.
12-volt electrical system with alternator and battery specifications.
Components: 75-amp alternator, maintenance-free batteries, circuit breakers.
Starting System: 12-volt starter motor, solenoid activation. Charging System: Internal regulator alternator. Lighting: Sealed beam headlights, incandescent marker lights. Instrument Panel: Analog gauges for speedometer, tachometer, fuel, temperature, oil pressure, air pressure.
Frame construction and suspension components maintenance.
Tip: Regular inspection of suspension components for wear and proper torque.
Scheduled maintenance intervals and procedures.
WARNING! Use only recommended fluids and filters. Improper maintenance can void warranty.
Daily pre-trip inspection and operating guidelines.
Common operational issues and diagnostic procedures.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel, electrical, or battery issues | Check fuel supply, battery voltage, starter operation |
| Poor engine performance | Air/fuel restriction | Inspect air filter, fuel filters, injection timing |
| Transmission shifting hard | Low fluid, linkage adjustment | Check fluid level, adjust shift linkage |
| Brakes dragging | Adjustment, air system | Check brake adjustment, air system operation |
| Electrical problems | Battery, alternator, grounds | Test battery, alternator output, check ground connections |
Reset: Refer to specific system reset procedures in appropriate sections.
Service: Contact authorized International dealer for technical support.
Genuine International parts recommended for optimal performance and warranty compliance.
CAUTION! Use of non-approved parts may affect vehicle performance and safety.
Important safety information for operation and maintenance.
Always use proper jack stands when working under vehicle. Disconnect batteries before electrical work. Use personal protective equipment. Follow all environmental regulations for fluid disposal. Secure vehicle with wheel chocks when servicing.