Content

Engines 4JA1 / 4JH1

Troubleshooting

• Hard starting
• Unstable idling
• Insufficient power
• Excessive fuel consumption
• Excessive oil consumption
• Overheating
• White exhaust smoke
• Dark exhaust smoke
• Oil pressure does not rise
• Abnormal engine noise
• Rotating part wear of turbocharger
• Oil leakage from turbochrger
• Insufficient acceleration and/or lack of power due to turbocharger
• Battery charging and noise problem
• Starter motor problem

Engine mechanical

• Main data and specifications
• Torque specification
• Recommended liquid gasket
• Loctite application procedure
• Servicing
• General description
• Removal and installation
• Engine repair kit
• Engine overhaul
• Inspection and repair
• Lubrication system
• Inter cooler
• Special tools

Engine cooling

• Main data and specifications
• Diagnosis
• Draining and refilling cooling system
• Water pump
• Thermostat
• Radiator
• Fan clutch with cooling fan

Fuel system

• Main data and specifications
• General description
• Fuel tank
• Fuel gauge unit
• Fuel tube / quick - connector fittings
• Filler neck
• Fuel filler cap
• Injection pump
• Injection nozzle (4JA1L)
• Special tools

Engine electrical

• Main data and specifications
• General description
• Torque specifications
• Generator
• Starter motor
• Pre-heating system

Engine control system

• Specifications
• Schematic and routing diagrams
• Component locator
• Diagnostic information and prosedures
• Repair instructions
• Description and operation
• Special tools and equipment

Exhaust system

• Main data and specifications
• General description
• Removal and installation
• Inspection and repair
• General description
• EGR system diagram
• Inspection
• EGR cooler (4JA1TC / 4JH1TC EURO-III model)
• Turbocharger
• General description
• Inspection and repair
• Special tools
• IHI service network

Accelerator control

• Removal and installation

Engine 4JB1

Service information

Main data and specifications

Service standard

Servicing

Model identification

Lubricating system

Fuel system

Cooling system

Engine control

Fixing torque

Special tools