Onan Generator Models HGJAA, HGJAB, HGJAC, HGJAD, HGJAE, HGJAF Service Manual

Description

This is the Factory Diagnostic and Service Manual for the Generator Listed Below
Onan Generator Models HGJAA, HGJAB, HGJAC, HGJAD, HGJAE, HGJAF Service Manual
This manual contains 7.78MB of information on 139 pages all on a convenient CD.  No more torn or greasy paper manuals, simply print the page you want then throw it out when you're done.
The Contents of the Manual Listed Below
SAFETY PRECAUTIONS
INTRODUCTION
OPERATION
Fuel Recommendations
Engine Oil Recommendations
Starting Batteries
Remote Control Panel
Conducting Pre-Start Checks
Priming Gasoline Fuel Systems
Starting the Genset
Stopping the Genset
Restarting the Genset
Engine Only Operation
Genset Lockout Switch
Conducting General Inspections
Checking Engine Oil Level
Changing Engine Oil and Oil Filter
Maintaining Battery and Battery Connections
Replacing the Air Filter Element
Cleaning the Spark Arrestor
PREPARING FOR SERVICE
Troubleshooting
Safety
Special Tools
Removing the Genset
Installing the Genset
CONTROL
Controller A1
Other Control Components
GENERATOR
Generator Description
Generator Service
Brushes and Slip Rings
Generator Testing
Voltage Adjustments—HGJAD, HGJAE, HGJAF
Generator Connections
FAN, DRIVE BELT, FLYWHEEL, IGNITION, EXHAUST
Fan, Belt, Pulleys and Flywheel
Ignition System
Exhaust System
FUEL SYSTEM
Gasoline Fuel System—HGJAA & HGJAD
Gasoline Fuel System—HGJAB, HGJAC, HGJAE, HGJAF
LPG Fuel System—HGJAB, HGJAC, HGJAE, HGJAF
Mechanical Governor—HGJAB, HGJAC, HGJAE, HGJAF
ENGINE
Testing Compression / Leakdown
Testing Crankcase Vacuum
Removing and Installing Generator / Engine Assembly
Removing and Installing Engine
Starter Motor
Adjusting Valve Lash
Cylinder Heads and Valves
Crankcase Assembly
Dimensions and Clearances
HYDRAULIC PUMP
Installing the Hydraulic Pump  Connecting Hydraulic Hoses
TROUBLESHOOTING  Fault Codes
Genset Starts or Stops Without Command – No Fault Code
No Response – Status Indicator Light Dead
Starting Batteries Run Down
Starter Engages – Disengages
No AC Power – Genset Running, Status LED On Steady or Flashing Rapidly
Genset Cranks But Does Not Start – No Fault Code
Genset Runs But Stops When Switch Is Released – No Fault Code 1
Low Oil Pressure Fault – Fault Code
2
Service Check Fault – Fault Code 3
Overcrank – Fault Code 4
Overvoltage – Fault Code 12
Undervoltage – Fault Code 13
Overfrequency – Fault Code 14
Underfrequency – Fault Code 15
Fuel Pump Fault – Fault Code 17
Governor Actuator (EFI Only) – Fault Code 19
Governor Actuator Overload (EFI Only) – Fault Code 22
Oil Pressure Switch Fault – Fault Code 23
Voltage Sense Lost – Fault Code 27
High Battery Voltage – Fault Code 29
Overspeed Fault (HGJAD, E, F Models Only) – Fault Code 31
Low Cranking Speed Sense – Fault Code 32
Fault Code 33 – Fault Code 33
Control Card Failure – Fault Code 35
Genset Stopped Without Fault Condition – Fault Code 36
Invalid Set Configuration – Fault Code 37
Field Overload (Overvoltage) – Fault Code 38
TROUBLESHOOTING
Generator Rotor Fault – Fault Code 41
Processor Fault – Fault Code 42
Processor Fault – Fault Code 43
Speed Sense Fault – Fault Code 45
Ignition Fault – Fault Code 47
Field Sense Fault – Fault Code 48
Processor Failure – Fault Code 51
Fuel Injector Fault – Fault Code 52
MAT Sensor Fault – Fault Code 54
MAP Sensor Fault – Fault Code 56
Overprime Fault – Fault Code 57 1
12. SERVICE CHECKLIST
13. SPECIFICATIONS
14. TORQUE SPECIFICATIONS
WIRING DIAGRAM—HGJAA A-1
WIRING HARNESS—HGJAA A-2
WIRING DIAGRAM—HGJAB/HGJAC A-3
WIRING HARNESS—HGJAB/HGJAC A-4
WIRING DIAGRAM—HGJAD A-5
WIRING HARNESS—HGJAD A-6 .
WIRING DIAGRAM—HGJAE & HGJAF A-7
WIRING HARNESS—HGJAE & HDJAF A-8
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