Name: Generac Power Systems NP-40G Series
Brand: Generac Power Systems
Rating: 4 (1 reviews)

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Safety Information2
Generator Fundamentals5
Introduction to Ccg's8
Why Variable Speed Control?9
Major Components11
Permanent Magnet Rotor11
Rotor Hub12
Stator Retaining Ring12
Stator Assembly12
Stepper Motor12
The Genistor13
The CCG Circuit Board13
Operational Description15
Block Diagram - AC Generator System15
Insulation Resistance17
Dirt and Moisture17
Stator Leads17
Test All Stator Windings to Ground17
Test for Shorts between Windings18
Results of Tests18
Cleaning the Generator18
Using Solvents for Cleaning18
Drying the Generator19
Components Testing21
Symptoms of Stator Failure21
Testing the Stator with a vom21
Testing Power Phase Windings21
Testing Power Supply Windings22
Testing the Timing Winding22
Short Circuit between Windings22
Genistor Testing23
Symptoms of Genistor Failure23
Testing the Battery Charge Circuit23
Testing the CCG Circuit Board24
Symptoms of Circuit Failure24
Control Panel Exploded View27
Sheet Metal29
General Information34
4-Cycle Engine Theory34
Recommended Fuels35
Recommended Engine Oil35
Storage Instructions35
Return to Service after Storage35
Engine Tuneup36
Exploded View of Engine Long Block37
Valve Train Components38
Valve Components Removal38
Valve Service39
Valve Seats39
Valve Components Installation40
Valve Tappets40
Valve Springs40
Adjusting Valve Clearance41
Rocker Arm Cover Installation42
Piston, Rings, Connecting Rod44
Oversize Piston and Rings44
Piston Removal from Connecting Rod44
Check for Piston Wear44
Piston Rings45
Checking Piston Ring End Gap45
Piston Assembly and Installation46
Cylinder Service46
Reboring the Cylinder47
Crankshaft and Camshaft48
Crankcase Cover Removal48
Camshaft Removal and Inspection48
Crankshaft Removal48
Crankshaft Inspection49
Compression Release Mechanism50
Installing the Crankshaft50
Installing the Camshaft50
Gasoline Fuel System52
Recommended Fuel53
Evaporation Control Systems53
Air Cleaner and Air Intake55
Fuel Filter57
Fuel Pump57
Carburetor Operation59
Carburetor Disassembly59
Carburetor Cleaning and Inspection60
Carburetor Adjustment60
Engine Speed61
Throttle Linkage Adjustment61
Carburetor Removal62
Automatic Choke63
Pre-Choke Adjustment63
Choke Solenoid Adjustment63
Speed Control System65
CCG Control Board65
Stepper Motor Problems65
Testing the Stepper Motor66
Gaseous Fuel System67
Vapor Withdrawal68
Fuel Supply Lines69
Excess Flow Valve69
Gaseous Carburetion70
Leakage Testing70
Shutoff Valve and Regulator72
The LP Gas Regulator72
Testing the Fuel Lockoff Solenoid72
Carburetor Technical Data74
Engine Oil and Cooling System76
Oil Flow77
Oil Pickup Screen77
Oil Pump77
Crankshaft Oil Seals78
Pressure Relief Valve78
Breather Assembly78
Oil Sump79
Oil Filter Support79
Engine Cooling System81
Generator Air Flow81
Air Flow into Generator Compartment81
Compensating for Restrictions81
Engine Electrical System83
Engine DC Control System84
Engine Controller Board86
Engine Cranking System88
Recommended Battery88
Battery Cables88
Testing a Battery88
Start-Run-Stop Switch89
Starter Contactor Testing89
Engine Ignition System92
Ignition Cage Assembly92
Ignition Sensor92
Ignition Module92
Ignition Coil93
Spark Plug93
Ignition System Testing93
Testing for Spark94
Checking Engine Miss94
Check Power Supply94
Check Ignition Sensor94
Testing Ignition Coil95
Testing Ignition Module95
Engine Protective Devices96
Oil Pressure Switch96
Oil Temperature Switch96
Optional Remote Panel98
Remote Panel Cables98
Wiring Connections98
Troubleshooting100
Generator and Speed Control System Troubles101
Engine DC Control System Troubles103
Priming Function Does Not Work103
Engine will Not Crank104
Engine Cranks but will Not Start104
Engine Starts Hard and Runs Rough106
Engine Starts then Shuts down after a few Seconds107
Check 15 Amp Fuse108
Check Power to Switch108
Check Power to Fuel Pump108
Check Battery/Battery Circuit109
Test Primer Switch109
Check Wire 14A to Fuel Pump109
Check Power Supply to Starter Motor109
Check Wire 56 Power to Starter Contactor110
Check Engine Controller Board Power Supply110
Test Start-Stop Switch111
Check Fuel Supply111
Check Spark Plug111
Check Ignition Power Supply112
Check Engine Controller Board Output to Wire 14112
Check Carburetion113
Check Engine113
Isolate the CCG System114
Test Oil Pressure Switch114
Test CCG System114
Specifications117
Electrical Schematic119
Wiring Diagram120
Engine Specifications121

Brand	Generac Power Systems
Model	NP-40G Series
Category	Inverter
Language	English

Generac Power Systems NP-40G Series User Manual

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