Related Manuals for Onan JB
Summarization of Contents
Safety Precautions
WARNING Symbol
Warns of potential serious personal injury.
CAUTION Symbol
Warns of potential equipment damage.
Safety Codes and General Practices
Advises code compliance and covers fire safety, moving parts, battery, fuel, exhaust, and cooling systems.
GENERAL INFORMATION
FOREWORD
Introduction to the manual's scope and engine models.
Exhaust Gas Hazard Warning
Critical warning about the dangers of carbon monoxide poisoning.
California Proposition 65 Warning
Warning about chemicals in engine exhaust causing cancer or birth defects.
SPECIFICATIONS
Tune-Up Specifications
Specific settings and clearances for engine tuning.
DIMENSIONS AND CLEARANCES
Camshaft, Connecting Rods, Cylinder Specs
Dimensions and clearances for camshaft, connecting rods, and cylinder bore.
Crankshaft, Piston, Pin, Rings Specs
Measurements for crankshaft, piston, pin, rings, and clearances.
Valve Dimensions and Clearances
Dimensions and clearances for intake and exhaust valves.
ASSEMBLY TORQUES AND SPECIAL TOOLS
Assembly Torques
Specific torque values for engine assembly fasteners.
Special Tools and Optional Equipment
List of specialized tools and available optional engine accessories.
INSTALLATION
Installation Basics
General guidelines, location, mounting, and ventilation for engine installation.
Fuel and Exhaust System Installation
Safe practices for installing fuel and exhaust systems.
Gaseous Fuel and Battery Installation
Procedures for gaseous fuel systems, battery, and oil drain extension.
OPERATION
Pre-Start and Starting Procedures
Steps for preparing and starting the engine, including safety.
Operating Conditions and Adjustments
Engine operation in various temperatures and fuel types.
Engine Care and High Altitude Operation
Maintenance for dust, high altitude, extended storage, and return to service.
TROUBLESHOOTING GUIDE
System-Specific Troubleshooting
Common issues and causes for starting, ignition, fuel, internal engine, cooling, lubrication, and governor systems.
SERVICE AND MAINTENANCE
Service Notes and Periodic Chart
Supplementary notes and the schedule for periodic maintenance tasks.
COOLING SYSTEM
Cooling System Maintenance and Overheating
Routine upkeep and troubleshooting for overheating issues.
Optional Air Shutter
Description and function of the optional air shutter.
FUEL SYSTEM
Fuel Types and System Maintenance
Fuel recommendations and periodic maintenance for the fuel system.
Carburetor Systems
Details on choke, gasoline, gaseous, and combination carburetors.
Gaseous Fuel Regulator
Function, testing, and adjustment of the gaseous fuel regulator.
AIR CLEANER
Air Cleaner Types and Service
Servicing instructions for dry paper, foam, and oil bath air cleaners.
Carburetor Air Pre-Heater
Function and operation of the optional carburetor air pre-heater.
IGNITION SYSTEM
Ignition System Testing and Maintenance
Procedures for testing and maintaining ignition components.
Breaker Points, Condenser, Coil
Adjustment, testing, and replacement of breaker points, condenser, and coil.
Magneto and JC Ignition Systems
Information on magneto and JC series ignition systems, including distributors.
Spark Plugs
Proper cleaning, gapping, and replacement of spark plugs.
GOVERNOR SYSTEM
Governor System Overview and Maintenance
System function, lubrication, and inspection.
Governor Adjustments
Procedures for adjusting governed speed and sensitivity on different models.
OIL SYSTEM
Oil System Maintenance and Components
Regular maintenance tasks and description of oil system components.
Oil Pressure Gauge, Pump, Valve, Filter, Lines
Details on oil pressure gauge, pump, bypass valve, filter, and oil lines.
Crankcase Breather
Function, servicing, and types of crankcase breathers.
STARTING SYSTEM
Starting System Testing and Repair
Procedures for testing, repairing, and maintaining the starting system.
Starter Removal and Installation
Procedures for removing and installing Prestolite and Mitsubishi starters.
FLYWHEEL ALTERNATOR
Alternator System Overview and Maintenance
Description, maintenance, and general testing of the alternator system.
Alternator System Testing
Specific tests for Wico system, stator, rectifier, and voltage regulator.
ENGINE DISASSEMBLY AND REPAIR
Cylinder Heads and Valves Procedures
Steps for cylinder head and valve removal, inspection, and installation.
Piston, Cylinder, and Connecting Rod Procedures
Procedures for pistons, cylinders, connecting rods, bearings, and rings.
Replacing Valve Guides
Step-by-step guide for removing and installing valve guides.
WIRING DIAGRAMS
Wiring Diagram Schematics
Schematic diagrams illustrating the engine's electrical system.
Wiring Diagram Parts List
List of components referenced in the wiring diagrams.
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