Generac Power Systems 75, 55, 65 manual QTY Description, Flywheel Assy GT-990

Page 79

Section 9

Exploded Views / Part Numbers

ITEM

PART NO.

QTY.

DESCRIPTION

 

ITEM

PART NO.

QTY.

DESCRIPTION

1

045756

15

SCREW HHTT M6-1.0 X 10 YC

57

0A7095

2

RHMS 4-40 X 5/16SEMS

2

0D1131

1

GUARD,FAN 12KW HSB

58

0D9404

1

SPRING, CHOKE RETURN

3

0C3022G

1

HOUSING, BLOWER V-TWIN RV

59

0D9801A

1

WRAP, VALLEY UPPER SPCC

4

0C9763

4

NUT,GROMMET 1/4 PLUG

60

0C3018A

1

WRAPPER,UPR #1 W/ M8 WELD NUT

5

0D9782

1

HOSE, BREATHER

61

0D9680A

1

WRAP, VALLEY GTV760 RV SPCC

6

0C3034

1

NUT HEX M24-2.0 G8 YEL CHR

62

0D1143A

1

WRAPPER,UPR #2 W/ M8 WELD NUT

7

0C3033

1

WASHER,BELLEVILLE 25MM BOLT

63

0C3053

1

ASSY GROUND WIRE GTV990

8

051754

2

SCREW HHC M8-1.25 X 12 G8.8

64

085011

1

INSULATOR ASM IGN

9

0A5992

2

WASHER SHAKEPROOF INT M8 SS

65

0D9852

2

ASSY,IGNITION COIL GT760 RV

10

0C3032

1

PLATE, FAN GTV-990

66

022097

8

WASHER LOCK M6-1/4

11

0C3031

1

FAN NYLON GTV-990

67

092079

4

SCREW HHTT M6-1.0 X 25 BP

12

0C3725A

1

FLYWHEEL ASSY GT-990

68

0C1546

1

O-RING 59.92 X 66.98 X 3.53MM

13

0C3016A

1

PLATE,BACKING GT990 W/OIL COOL

69

0C1547

1

O-RING 21.89 X 27.13 X 2.62MM

14

023484S

1

BUSHING SNAP

70

082774

1

KEY, WOODRFF 4 X 19D

15

0D9679A

1

WRAP, CRANKCASE GTV760 RV SPCC

71

0A5358

1

ADPTR OIL PAD, FLARE

16

0D9708

1

GT760 VERTICAL SHAFT RV ENGINE

72

0D9312

1

TUBE, ENGINE OIL RETURN

17

0D9681A

1

WRAP, CYL 1 GTV760 RV SPCC

73

0D9314

1

TUBE, ENGINE OIL OUT

18

056893

13

SCREW CRIMPTITE 10-24 X ½

74

0C1557

1

O-RING 20.35 X 23.91 X 1.78MM

19

072347

2

SPARK PLUG

75

0A9028

1

BOLT, OIL ADAPTOR

20

0E0998

1

CLAMP VINYL 9.5 O.D. TUBE

76

0D9682A

1

WRAP, CYL 2 GTV760 RV SPCC

21

0D8384

1

TUBE, OIL DRAIN & CHECK

77

0D9270

1

INTAKE TUBE 1.25" X 20 GA

22

043790A

1

BARBED EL 90 3/8NPT X 3/8 VS

78

048031A

2

HOSE CLMP-BAND 1 5/8

23

0D3083

1

ASSEMBLY, OIL DRAIN HOSE

79

0D9269

1

BOOT, INTAKE AIRBOX

24

0E0361A

1

OIL DRAIN / DIPSTICK TUBE VTW

80

0E0142

1

BOOT, CARB ADAPTOR

25

0E0393

1

ASSEMBLY, CAP & DIP STICK

81

078643B

2

BOLT,CARB MOUNT M6 X 1.0 -85LG

26

0C2824

2

SCREW TAP-R #10-32 X 9/16 (GASO-

82

0D9219

1

ADAPTER, AIR INTAKE CARB

 

 

 

LINE ONLY)

83

0E0573

1

GASKET,CARB TO ADAPTOR

 

0C2824

1

SCREW TAP-R #10-32 X 9/16 (LP ONLY)

84

0D8807

1

CARBURETOR, GT-760 (GASOLINE

27

065852

1

SPRING CLIP HOLDER .37-.62

 

 

 

 

ONLY)

28

075246

4

SCREW HHTT 3/8-16 X 1-1/4 CZ

 

 

0E1217

1

CARBURETOR, GT-760 (LP ONLY)

29

0A4456

1

WASHER LOCK SPECIAL 3/8

85

0E0572

1

GASKET,CARB TO INTAKE MANIFOLD

30

0A2311

2

SCREW SWAGE 1/4-20 X 1 Z/YC

86

0C3043

2

GASKET INTAKE PORT GT990

31

070185

1

FILTER, OIL D 69X64 LG

87

0D8836

1

MANIFOLD, INTAKE 760 RV

32

0A8584

1

SWITCH OIL PRESSURE HOBBS

88

049821

4

SCREW SHC M8-1.25 X 30 G12.9

33

0A5360

1

SUPPORT OIL FLTR,FLARE

89

070008

4

WASHER FLAT M8 SS

34

043182

2

WASHER LOCK M3

90

070006

4

WASHER LOCK M8 SS

35

0C1085

2

SCREW PPHM M3-0.5 X 8

91

035461A

2

BARBED STR 1/4NPT X 3/8 W/VS

36

0E1497

1

SWITCH, OIL HIGH TEMP (GASOLINE

92

0C7649

4

CLAMP HOSE 0.38" - 0.87"

 

 

 

ONLY)

93

0C9806

2

HOSE,3/8"IDX6"L 300F

 

075281

1

SWITCH, OIL HIGH TEMP (LP ONLY)

94

0C3026

1

COOLER, OIL GTV-990

37

0D9399

1

ASSEMBLY, GOVERNOR LEVER

95

0D9683A

1

DUCT, OIL CLR GTV760 RV SPCC

38

0D9513

1

SPRING, GOV.(5.5 KW & 5.0 KW-50HZ

96

0C9764

4

PLASTITE,1/4-15 X ¾

 

 

 

ONLY)

97

036933

1

SCREW PPHM #10-32 X 3/8

 

0E1498

1

SPRING, GOV.(6.5/7.5 KW & 7.0 KW-

98

0E0246

1

SCREW HHTT #4-40 X ¼

 

 

 

50HZ ONLY)

99

0D9394

1

PLATE, THROTTLE

39

0D1366

2

BUSHING, GOVERNOR ROD

100

022152

1

WASHER LOCK #10

40

0D9395

1

ROD, GOVERNOR

101

022158

1

NUT HEX #10-32 STEEL

41

077075

1

BOOT CHOKE SOLENOID (GASOLINE

102

043116

2

SCREW HHC M6-1.0 X 12 G8.8

 

 

 

ONLY)

103

049811

4

WASHER FLAT M6

42

0A7094

2

RHMS 4-40 X 1/4 SEMS (GASOLINE

104

047411

2

SCREW HHC M6-1.0 X 16 G8.8

 

 

 

ONLY)

105

066849B

2

SCREW HHTT M5-0.8 X 8 BP

43

0D8590

1

ASSY, BI-METAL/HEATER (GASOLINE

106

057822

2

CLAMP HOSE #8 .53 - 1.00 (LP ONLY)

 

 

 

ONLY)

107

074994

2.25 FT.

HOSE 1\2 ID (LP ONLY)

44

0D8591

1

SOLENOID, CHOKE (GASOLINE ONLY)

108

075476

1

SCREW PPHM M4-0.7 X 16 (GASOLINE

45

045770

1

SCREW HHC M5-0.8 X 10 G8.8

 

 

 

 

ONLY)

46

049226

1

WASHER LOCK M5

109

082121A

1

CLIP-J VINYL COAT .375 ID (GASOLINE

47

051713

1

WASHER FLAT M5

 

 

 

 

ONLY)

48

0D9402

1

LINKAGE, CHOKE (GASOLINE ONLY)

110

038150

1

WASHER FLAT #8 (GASOLINE ONLY)

49

077091

1

COTTER PIN (GASOLINE ONLY)

111

022264

1

WASHER LOCK #8 (GASOLINE ONLY)

50

082025

1

NUT LOCK HEX M5-0.8 SS NYL INS

112

051715

1

NUT HEX M4-0.7 G8 YC (GASOLINE

51

0E1247

1

ASSEMBLY, GOV. ADJUSTMENT

 

 

 

 

ONLY)

52

055173

2

SCREW HHC M8-1.25 X 20 G10.9

113

0D6029

2

SCREW HHTT M6-1.0 X 16 YC

53

022129

2

WASHER LOCK M8-5/16

114

055934D

1

CLAMP VINYL 1.06 X .406 (LP

54

022145

2

WASHER FLAT 5/16-M8 ZINC

 

 

 

 

ONLY)

55

0D9403

1

LINKAGE CHOKE BELLCRANK/CARB

115

022473

1

WASHER FLAT 1/4-M6 (LP ONLY)

56

0E1246

1

ASSEM., CHOKE BRACKET (GASOLINE

116

090388

1

SCREW HHTT M6-1.0 X 12 (LP

 

 

 

ONLY)

 

 

 

 

ONLY)

 

0D9400

1

BRACKET, CHOKE (LP ONLY)

117

0E3200

1

CLAMP VINYL .437" X .281"

Page 77

Image 79
Contents Diagnostic Repair Manual Replacement Parts SafetyTable of Contents Section Exploded Views / Part Numbers Section Specifications & ChartsElectromagnetic Fields MagnetismElectromagnetic Induction More Sophisticated AC Generator Simple AC GeneratorGenerator Operating Diagram Generator AC Connection System Field BoostLine Breakers 120 Volts only Reconnection for Dual Voltage Output Connection for 120 Volts OnlyStator Assembly Rotor AssemblyGeneral Battery Charge ComponentsBrush Holder Excitation Circuit ComponentsDescription Adjustment ProcedureCrankcase Breather Voltage RegulatorCheck Breather Install BreatherInstall oil vapor collector and retainer Control Panel Component IdentificationDrying the Generator Cleaning the GeneratorEffects of Dirt and Moisture Insulation Resistance TestersStator SHORT-TO-GROUND Tests Brushing and Vacuum CleaningStator Insulation Resistance Cloth or Compressed AIRMegohmmeter Testing Rotor InsulationTesting Stator Insulation Testing Rotor InsulationMeasuring DC Voltage MetersVOM Measuring AC VoltageMeasuring Current Measuring AC FrequencyMeasuring Resistance Volt Electrical UnitsOhms LAW AmpereOperational Analysis IntroductionCircuit CONDITION- Rest Circuit CONDITION- Priming Circuit CONDITION- Cranking Choke Heater CH Circuit CONDITION-RUNNINGCircuit CONDITION- Shutdown Sure Switch LOP Circuit CONDITION- Fault ShutdownEngine Controller Circuit Board BatteryRecommended Battery Battery CablesSTART-STOP Switch Fuel Primer SwitchAMP Fuse Starter Contactor Relay Starter Motor Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Troubleshooting Flowcharts Discussion ProcedureTest 1- Check NO-LOAD Voltage Frequency Test 2- Check Engine GovernorIf continuity was indicated, go to Test Governor AdjustmentTest 3- Test Excitation Circuit Breaker Test 4- Fixed Excitation TEST/ROTOR AMP DrawSet a VOM to its Rx1 scale Test 5- Wire ContinuityRe-connect Wire 11 and Wire 22 to the Voltage Regulator Set the VOM to measure AC voltageTest 7 Test Stator DPE Winding Test 6- Check Field BoostIf field boost checks good, replace the Voltage Regulator Model Ohms Test 8- Check Sensing Leads / Power WindingsAcross Wires Ohms 11S 22STest 10 Check Brushes & Slip Rings Test 9- Check Brush LeadsReplace the Rotor if it fails the test Test 11- Check Rotor AssemblyTance Tests Procedure Test 12 Check Main Circuit BreakerTest 13- Check Load Voltage Frequency Test 15 Check Battery Charge OutputTest 16 Check Battery Charge Rectifier Battery Charge Rectifier BCR is a full wave rectifierShort to Ground 10. Battery Charge RectifierTest 18 TRY Cranking the Engine Test 19- Test Primer SwitchSet a VOM to read battery voltage 12 VDC Also see Fuel Primer Switch,13. The LPG Fuel Solenoid FS Test 20- Check Fuel PumpTest 23- Check Power Supply to Circuit Board Test 22- Check Battery & CablesTest 21- Check 7.5 AMP Fuse 17. Start-Stop Switch Test 24 Check START-STOP SwitchSet a VOM to measure DC voltage 12 VDC Test 26- Check Starter Contactor RelayTest 27 Check Starter Motor Test 26A Check Starter ContactorConditions Affecting Starter Motor Performance Tachometer Checking the PinionTools for Starter Performance Test Measuring CurrentRemove Starter Motor Testing Starter MotorTest 28- Check Fuel Supply Test BracketDiscussion LPG Models 28 LP Gas Carburetion DiagramCrank the engine. The meter should indicate battery voltage Test 29 Check Wire 14 Power SupplyTest 30 Check Wire Battery voltage is not measured, proceed to StepTest 32 Check Ignition Spark Test 31 Check Fuel Solenoid Gasoline ModelsConclusion No cylinder is weakest of the two cylinders Cylinder Balance TestTest 33 Check Spark Plugs Test 34 Check and Adjust Ignition Magnetos37. Setting Ignition Magneto Armature Air Gap Flywheel KEY Test 35 Check Valve AdjustmentAdjusting Valve Clearance Checking Flywheel MagnetTest 36 Check Carburetion Install Rocker ARM CoverTest 37 Check Choke Solenoid 43. Connector Check Compression Adjust the regulated pressure on the gauge to 80 psiDown Test / Compression Test Repeat Steps 1 through 8 on remaining cylinderTest 40 Test OIL Temperature Switch Test 39 Check OIL Pressure SwitchIf all steps check GOOD, go to Test Test 42 Check LPG Fuel Solenoid Test 41 Test Choke HeaterShort to Ground 49. Fuel Solenoid Rotor Removal Major DisassemblyENCLOSURE/PANEL Removal Stator RemovalEngine Removal Belt TensioningStarter Removal FLYWHEEL/MAGNETO Removal Page Section Exploded Views / Part Numbers Part NO. QTY Description Enclosure Drawing No E1011-B QTY Description Sheet Metal Drawing No E1012-E Flywheel Assy GT-990 QTY DescriptionControl Panel Drawing No E1013-A PANEL, TOP Control Wire ASM GRD STD ConnSwitch Spdt ON-MOM-ON Switch 6A Spdt Not ShownTwin Engine Drawing No E1014-B ASSEMBLY, OIL Fill CAP ASSEMBLY, Crankcase RVASSEMBLY, Breather ASSEMBLY, Head #1LP Regulator Drawing No E1530 SPRING-SOLENOID Plunger CASTING, Twin Regulator HousingWasher Flat M4 SOLENOID, Twin RegulatorSpecifications & Charts Nominal Resistances of Generator Windings AT 68F Generator SpecificationsEngine Speeds and Voltage Specifications Page Electrical Data Electrical Data PO BOX 297 WHITEWATER, WI

65, 75, 55 specifications

Generac Power Systems has established itself as a leader in power generation, offering a range of high-performance generators suited for residential and commercial applications. Among its lineup, the Generac 55, 65, and 75 kW generators stand out for their reliability, efficiency, and advanced features.

The Generac 55 kW generator is designed to provide a powerful backup solution for medium to large homes or small businesses. It features a robust engine that delivers dependable performance while maintaining fuel efficiency. One of its key characteristics is the True Power Technology, which produces clean and stable power, ensuring that sensitive electronic devices run smoothly without risk of damage. This generator is equipped with a fully automatic transfer switch, allowing for seamless power transition during outages, with minimal disruption.

Moving to the 65 kW model, it offers increased capacity while retaining the fundamental qualities of the 55 kW version. This unit is particularly suited for larger homes or commercial applications that require greater power demands. The 65 kW generator utilizes Generac’s G-Force engine, known for its durability and reduced maintenance needs. Advanced features such as remote monitoring capabilities allow users to check the generator's status from anywhere, providing peace of mind and convenience.

The 75 kW generator takes performance to the next level, making it ideal for even more significant power needs. It is engineered for both quiet operation and enhanced performance, accommodating a wide range of requirements from residential to larger commercial operations. The 75 kW model includes a full-load voltage regulation system that maintains stable power output under varying loads, safeguarding appliances and equipment.

All three models incorporate advanced air-cooled technology, which enhances their efficiency and operational lifespan. Additionally, their corrosion-resistant enclosures ensure durability even in harsh weather conditions, making them suitable for diverse environments. The intuitive LCD display on each unit provides critical information, including runtime hours and maintenance reminders, empowering users with easy access to the generator's performance data.

Overall, Generac Power Systems' 55, 65, and 75 kW generators represent a commitment to quality, reliability, and innovation in backup power solutions. They are designed to meet the demands of modern power consumption while ensuring peace of mind through robust engineering and advanced technology. Whether for home use or commercial applications, these generators provide an effective means to stay prepared for unexpected power outages.