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4

[3] Certification labels

The following labels must be visible. If you install the engine in way that makes the engine emission control

information label hard to read during normal engine maintenance, you must place a duplicate label on the equipment,
as described in 40 CFR 1068.105.

• EPA certification label part numbers

1H959-8891

△

: DG972

Содержание DG972 E2

Страница 1: ...KUBOTA ENGINES APPLICATION MANUAL WG752 WG972 E3 MODEL DG972 E2 MODEL First Edition January 2011 KUBOTA...

Страница 2: ...RAL INFORMATION 0 GENERAL 1 EMISSION REGULATION 2 FUEL SYSTEM 3 EXHAUST SYSTEM 4 ELECTRICAL SYSTEM 3 TECHNICAL INFORMATION 4 APPLICATION CHECK SHEET 5 EXHAUST EMISSION CHECK SHEET 6 EMISSIONS RELATED...

Страница 3: ...cribes only the content that should be mentioned specially for small SI engines Please also refer to the diesel engine application manual 5 Phase3 emissions regulations require confirmation of Emissio...

Страница 4: ...2 GENERAL INFORMATION...

Страница 5: ...0 GENERAL CONTENTS 1 SPECIFICATIONS 0 1 2 PERFORMANCE CURVES 0 4 3 DIMENSIONS 0 6...

Страница 6: ...0 3600 12 7 17 0 3600 JIS B8002 Net Intermittent 17 1 23 0 3600 16 4 22 0 3600 JIS B8002 Continuous 13 4 18 0 3600 12 7 17 0 3600 Max torque SAE J1349 N m ft lb min 1 rpm 54 9 40 5 2400 52 0 38 3 240...

Страница 7: ...3600 22 0 29 5 3600 JIS B8002 Continuous 18 7 25 0 3600 17 5 23 5 3600 Max torque SAE J1349 N m ft lb min 1 rpm 68 6 50 6 2400 64 6 47 6 2400 Compression ratio 9 2 Firing order 1 2 3 Ignition timing...

Страница 8: ...00 2 JIS B8002 Net Intermittent 17 6 23 6 3600 2 JIS B8002 Continuous 14 5 19 4 3600 2 Max torque SAE J1349 N m ft lb min 1 rpm 55 0 40 5 2400 2 Compression ratio 9 2 Firing order 1 2 3 Ignition timin...

Страница 9: ...0 4 2 PERFORMANCE CURVES...

Страница 10: ...0 5...

Страница 11: ...0 6 3 DIMENSIONS WG752 G E3BBH 1 EG641 00000...

Страница 12: ...0 7 WG752 GL E3BBH 1 EG645 00000...

Страница 13: ...0 8 WG972 G E3BBH 1 EG801 00000...

Страница 14: ...0 9 WG972 GL E3BBH 1 EG805 00000...

Страница 15: ...0 10 WG972 GL E3SAEH 1 EG802 00000...

Страница 16: ...0 11 DG972 E2 BBH 1 EG581 00000...

Страница 17: ...0 12 DG972 E2 SAEH 1 EG582 00000...

Страница 18: ...0 13 WG752 WG972 DG972 Flywheel Normal SAE for Clutch No 6 1 2 Flywheel Housing Normal SAE No 5...

Страница 19: ...tions 1 3 1 Air Intake System 1 3 2 Exhaust System See EXHAUST SYSTEM section WG752 WG972 1 5 3 High Altitude Operation See FUEL SYSTEM section WG752 WG972 1 5 4 Evaporative Emission Controls 1 5 5 En...

Страница 20: ...Available WG DF752 E2 E2 Non available Available Available DG972 E2 Available Available Available 19 P 30 0 825 L 1 0 WG972 G GL E3 E3 Available Available Non available WG DF972 E2 E2 Non available Av...

Страница 21: ...tructions are provided for the final engine assemblers who must ensure the engine exhaust system catalyst intake system gasoline fuel system and etc are Installed correctly in the engine s certified c...

Страница 22: ...ion review When the same specification engine is installed on multiple applications you will have to inform to Kubota prior to the application review Also the final intake system of each application m...

Страница 23: ...1 4 DG972 E2 BBH DG972 E2 SAEH WG 972 GL E3SAEH...

Страница 24: ...arts after application review Do not change without the consultation with Kubota 3 High Altitude Operation See FUEL SYSTEM section WG752 WG972 Kubota prepared genuine altitude compensation kit The ult...

Страница 25: ...See FUEL SYSTEM section The hose length between the vaporizer gas regulator and carburetor gas mixer must be within 300 20 mm 11 8 0 78 inch Only use hose appropriate for LPG 8 Tamper Resistance Any...

Страница 26: ...g CARBURETOR WG752 WG972 The carburetor is tamper resistant the idle mixture screw has been covered by tamper plug after adjustment at the factory You CAN NOT adjust this screw LPG REGULATOR WG752 GL...

Страница 27: ...y tamper caps after adjustment at the factory You CANNOT adjust the screw GOVERNOR LEVER THROTTLE ANGLE Only spec model of specification that limits throttle angle The governor lever is tamper resista...

Страница 28: ...4 2 Change the angle of LPG fitting of dual fuel carburetor and Gas fitting of gas mixer 2 4 3 Setting and vibration limits 2 4 4 Starting the engine WG752 GL WG972 GL 2 4 2 For emission regulations W...

Страница 29: ...ards KUBOTA RECOMMENDED LPG FUEL SPECIFICATIONS vol NOTE GPA means Gas Processors Association U S A 3 Natural gas Natural gas equivalent to city gas This manual describes the performance with Japanese...

Страница 30: ...EM if these are necessary for certification of Evaporative Emission Regulation Each pipes should be surely connected by clamp When gasoline tank location is lower than carburetor gasoline cock is not...

Страница 31: ...2 3 DG972 See next page CAUTIONS Mark 1 to 2 are supplied by KUBOTA The other parts should be procured by OEM include hose Each pipes should be surely connected by clamp...

Страница 32: ...RE NOT KUBOTA supplied 2 Change the angle of LPG fitting of dual fuel carburetor and Gas fitting of gas mixer The fitting may be mounted on any position since it is not sealed The nut may by loosened...

Страница 33: ...A GENUINE VAPORIZER KIT Gas regulator can be used Vaporizer and Gas regulator can only be installed by an authorized KUBOTA DISTRIBUTOR or the manufacturer of the equipment in which this engine is use...

Страница 34: ...ith the regulations through the installation of the appropriate altitude compensation kit for the altitude range where the engine will be operated Prepare for the users who have lost original carburet...

Страница 35: ...engine intake system Kubota prepared the purge port on the air cleaner flange You may use this purge port to combust fuel vapors vented from the fuel tank 2 Related Check Items You must confirm that t...

Страница 36: ...3 EXHAUST SYSTEM CONTENTS 1 GENERAL WG752 WG972 3 1 2 EXCEPTIONS WG752 WG972 3 2 3 RELATED CHECK ITEMS 3 3 4 FOR MASS PRODUCTION WG752 WG972 3 4...

Страница 37: ...t Emission Check Sheet You must install the catalyst parts directly to the exhaust manifold through the gasket See SOS option manual about selectable combinations of the catalyst parts and the exhaust...

Страница 38: ...thickness of the spacer is 20 mm 0 78 inch CAUTION Kubota gasket must be installed on both sides of the spacer The surface roughness of both Sides of the spacer must be less than 3 2a 3 2 m And allow...

Страница 39: ...ation and not to disconnect during operation If wiring comes off or disconnect catalyst parts might be damaged and the exhaust temperature become very high You must confirm layout of the parts ex add...

Страница 40: ...lyst parts You must keep record of the catalyst identification information with the engine model and engine serial number that the catalyst is installed Check Item The catalyst parts are shipped with...

Страница 41: ...4 ELECTRICAL SYSTEM CONTENTS 1 WIRING DIAGRAM 4 1 2 CAUTION WG752 WG972 4 3...

Страница 42: ...4 1 1 WIRING DIAGRAM WG752...

Страница 43: ...4 2 WG972 DG972...

Страница 44: ...tor If wires become disconnected catalyst parts may be damaged and very high exhaust gas temperature may result Please confirm that the connecting order of cylinder number of the igniter and IG coil s...

Страница 45: ...3 TECHNICAL INFORMATION...

Страница 46: ...stion and cooling air requirements At 25 deg C and 1000 hPa 1 6 5 EXHAUST GAS VOLUME 1 7 6 HEAT REJECTION TO COOLANT 1 8 7 WATER FLOW RATE 1 10 1 WATER FLOW RATE OF WG752 1 10 2 WATER FLOW RATE OF WG9...

Страница 47: ...0 PS 14 5 17 8 20 3 21 8 22 3 Net continuous kW 8 2 10 2 11 5 12 4 12 7 HP 11 0 13 7 15 4 16 6 17 0 PS 11 1 13 9 15 6 16 9 17 3 Model Fuel Output Engine Speed min 1 rpm 2000 2400 2800 3200 3600 WG972...

Страница 48: ...Ph 225 221 228 240 251 g PSh 221 218 225 237 248 lb HPh 0 495 0 487 0 503 0 530 0 554 Model Fuel Output Engine Speed min 1 rpm 2000 2400 2800 3200 3600 WG972 Gasoline Brake horse power kW 14 8 17 8 20...

Страница 49: ...fan air cleaner and muffler min 1 rpm Load ratio Fuel Sound pressure at 1 m 3 3 ft WG752 3850 0 4 Gasoline 89 LPG 87 3600 4 4 Gasoline 91 LPG 89 1500 0 4 Gasoline 72 LPG 72 min 1 rpm Load ratio Fuel...

Страница 50: ...ustion air requirements L sec 9 99 11 99 13 99 15 98 17 98 m3 h 35 96 43 16 50 35 57 54 64 74 in3 sec 610 732 853 975 1097 ft3 min 21 16 25 40 29 63 33 86 38 10 Model Fuel Output Engine Speed min 1 rp...

Страница 51: ...1257 1490 1719 1975 2419 in3 sec 21307 25251 29146 33475 41005 ft3 min 739 7 876 7 1011 9 1162 2 1423 6 Model Fuel Output Engine Speed min 1 rpm 2000 2400 2800 3200 3600 WG972 Gasoline Cooling air re...

Страница 52: ...3 min 760 9 902 0 1041 5 1196 0 1461 7 Model Fuel Output Engine Speed min 1 rpm 2000 2400 2800 3200 3600 WG972 Gasoline Combustion and cooling air requirements L sec 584 9 753 6 843 8 855 7 789 3 m3 h...

Страница 53: ...48 103 3 123 96 144 62 165 29 185 95 in3 sec 1313 1751 2101 2451 2802 3152 ft3 min 45 6 60 8 73 0 85 1 97 3 109 4 Model Fuel Output Engine Speed min 1 rpm 2000 2400 2800 3200 3600 WG972 Gasoline Gas...

Страница 54: ...rpm 2000 2400 2800 3200 3600 WG752 Gasoline Brake horse power kW 11 3 13 8 15 6 16 7 17 1 HP 15 1 18 5 21 22 4 23 PS 15 3 18 8 21 3 22 7 23 3 Fuel consumption g kWh 325 315 323 343 347 g HPh 243 235...

Страница 55: ...272 258 245 lb HPh 0 664 0 654 0 609 0 577 0 549 Heat rejection to cooling water MJ h 44 37 47 51 54 81 58 90 64 88 kcal h 10599 11349 13094 14072 15501 BTU h 42058 45035 51957 55840 61509 LPG Brake h...

Страница 56: ...WATER FLOW RATE OF WG752 NOTE The flow is with std radiator Including engine block radiator and piping resistance Water Pump 1E051 7303 Fan Pulley Dia 84 mm 3 31 in Fan Drive Pulley Dia 100 mm 3 94 i...

Страница 57: ...RATE OF WG972 DG972 NOTE The flow is with std radiator Including engine block radiator and piping resistance Water Pump 1E051 7303 Fan Pulley Dia 84 mm 3 31 in Fan Drive Pulley Dia 100 mm 3 94 in Ther...

Страница 58: ...oil weight is not included in above engine weight Model Dry weight kg lb Center of gravity X mm in Y mm in Z mm in WG752 61 7 136 2 0 08 64 2 52 171 6 73 WG DG972 72 159 25 5 1 00 73 3 2 89 179 5 7 0...

Страница 59: ...LENGTH cm POLAR MOMENT OF INERTIA kgfcm sec2 LV L1 L2 Lf JV J1 J2 J3 Jf WG752 30670 5136 5136 3673 0 013 0 017 0 011 0 018 0 392 MODEL EQUIVALENT LENGTH cm POLAR MOMENT OF INERTIA kgfcm sec2 LV L1 L2...

Страница 60: ...I m r m L m Wp kgf Bore mm Stroke mm WG752 0 0980 0 0340 0 0720 0 4320 68 0 68 0 WG DG972 0 0980 0 0368 0 0800 0 3685 74 5 73 6 Model No of Cylinder Cylinder Bore mm Order Fz Npy Noz WG752 2 68 0 1 0...

Страница 61: ...rpm 2 x 3600 60 2 142122 Fz kgf 1 0 2 0 Npy kgf m 1 0 000093 142122 13 2 kg 2 0 000065 142122 9 2 kg Noz kgf m 1 0 000093 142122 13 2 kg 2 0 Engine model WG DG972 Engine speed 3600 min 1 rpm 2 x 3600...

Страница 62: ...rpm Idling Speed Application High Low Overload kW ps ISO 2534 3046 Continues kW ps ISO 2534 3046 Engine Engineering Dept KUBOTA Corporation Revision Issued 20 20 20 20 20 confirmed Equipment Maker Cu...

Страница 63: ...hat should be checked specially for Small SI Engines Please use the Application Check Sheet for Diesel Engines together Review Form a Engine Application Sheet 1 3 required technical factors and enviro...

Страница 64: ...engine maintenance interval clarified guard for rotating cover at high temp Parts area for burn prevention safety label speed control through Kubota speed control lever and or governor lever emission...

Страница 65: ...condition of 40 C 104 F in case that the ambient temperature is over 40 C 104 F it must be judged adding the balance between the actual temperature and 40 C 104 F to the judgment standard 3 Do not ru...

Страница 66: ...rear left right 9 Starter up down 5 10 0 7 1 forward rear left right 10 Dinamo Alternator up down 5 10 0 7 1 forward rear left right 11 IG coil up down 5 10 0 7 1 forward rear left right 12 Electric...

Страница 67: ...Date Date Date Date confirmed Equipment Manufacturer Final Assembler KUBOTA Corporation Engine Engineering Dept Company Name Name Issue No Rev No November 11 2010 1 Title Signature Date KUBOTA Engine...

Страница 68: ...ing the engine into the final certified configuration NOTE Make sure to contact KUBOTA via Kubota Sales Office before any parts related to delegated assembly listed in this check sheet are to be chang...

Страница 69: ...eck Sheet page 5 and section 1and 3 for Exhaust System Specification Check Sheet page 6 and send it to KBT KBT requests approval based on the approval route of cover page 1 from Engine Global Marketin...

Страница 70: ...OK Failed X Not Subject KUBOTA p n Part Name Part Name OEM p n Delegated Assembly Remarks select from KBT approved parts select from KBT approved parts select from KBT approved parts select from KBT...

Страница 71: ...nstallation details 2 Assembly Procedure To be filled by KUBOTA If there are Intake Fuel or Exhaust system changes at Customer s Product Emission of application must be rechecked Fuel System Specifica...

Страница 72: ...there are Intake Fuel or Exhaust system changes at Customer s Product Emission of application must be rechecked 3 Reporter Fuel system intake system exhaust system specification confirmation sheet Re...

Страница 73: ...Kubota Emissions Related Installation Instructions CARB EPA certified engines WG752 WG972 The instructions in this document supersede any other previous instructions provided by Kubota...

Страница 74: ...t Objective Items 1 1 Air Intake System 2 2 Exhaust System 4 3 High Altitude Operation 8 4 Evaporative Emission Controls 9 5 Engine Set Speed 10 6 Certification labels 11 7 Vaporizer Connections 12 3...

Страница 75: ...aust parts according to the instructions Catalyst parts other than Kubota must not be used because other catalyst is not certified for these engines You must consult Kubota when you change the exhaust...

Страница 76: ...heet before the application review When the same specification engine is installed on multiple applications you will have to inform Kubota prior to the application review Also the final intake system...

Страница 77: ...External view with standard kit Kit parts with 1 must be installed as shown in the figure below Exception The figure below shows the range of the layout that you can select freely for the standard ki...

Страница 78: ...rts according to these instructions and or the Exhaust Emission Check Sheet Catalyst parts other than Kubota must not be used because other catalyst is not certified our engine You must install the ex...

Страница 79: ...of the catalyst parts You must keep record of the catalyst identification information with the engine model and engine serial number that the catalyst is installed Check Item The catalyst parts are s...

Страница 80: ...en you use the converter you must install the converter in the direction where the elbow side of the converter is attached to the exhaust manifold Tighten with the specified torque 23 5 27 5 N m 17 33...

Страница 81: ...tant Check Item Kubota gasket must be installed on both sides of the spacer The surface roughness of both Sides of the spacer must be less than 3 2a 3 2 m And allowance of levelness must be less than...

Страница 82: ...djust the emissions by installing the appropriate genuine altitude compensation kit And the engine manufacturer must provide such kit when the engine is operated at an altitude that exceeds the standa...

Страница 83: ...ent must have a tethered fuel cap Fuel caps must also include a visual audible or other physical indication that they have been properly sealed EPA 40 CFR 1060 101 f 1 i CARB section 2756 Your equipme...

Страница 84: ...volume expansion by heat surface level difference by vibration and etc NOTE It is equipment manufacturer s responsibility to make sure the fuel system will comply with the applicable evaporative emiss...

Страница 85: ...t makes the engine emission control information label hard to read during normal engine maintenance you must place a duplicate label on the equipment as described in 40 CFR 1068 105 EPA CARB certifica...

Страница 86: ...g process Emissions Related Installation Check List Page Yes No 1 Correct intake system confirmed at application review and or the Exhaust Emission Check Sheet installed 2 3 2 Correct catalyst Kubota...

Страница 87: ...Kubota Emissions Related Installation Instructions EPA certified engines DG972 The instructions in this document supersede any other previous instructions provided by Kubota...

Страница 88: ...CONTENTS 1 Important Notice 1 2 About Objective Items 1 1 Air Intake System 1 2 Engine Set Speed 3 3 Certification labels 4 4 Regulator Connections 5 3 Production Installation Checklist 5...

Страница 89: ...s emission control information label hard to read during normal engine maintenance you must place a duplicate label on the equipment as described in 40 CFR 1068 105 4 Regulator Connections The hose le...

Страница 90: ...External view with standard kit Kit parts with 1 must be installed as shown in the figure below Exception The figure below shows the range of the layout that you can select freely for the standard ki...

Страница 91: ...in the engine speed range set at the time of the Kubota shipment without parasitic load You should use the speed control lever and or the governor lever to change engine speed Electronic Governor spec...

Страница 92: ...u install the engine in way that makes the engine emission control information label hard to read during normal engine maintenance you must place a duplicate label on the equipment as described in 40...

Страница 93: ...Review must be completed before the equipment is released to the market Below is a checklist to be used during the final assembly of each production unit Incorporate this checklist into your manufact...

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