Mitsubishi S12R Operation & Maintenance Manual
Mitsubishi S12R Operation & Maintenance Manual

Mitsubishi S12R Operation & Maintenance Manual

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For EPA Certified Engine
OPERATION &
MAINTENANCE MANUAL
Issued: December 2023
Pub. No. 291Y1-40720
Revision: 5
Contact Us for MHIET Engine Parts
According to the contents of the inquiry, we may share personal information
including your name, address, telephone number, e-mail address and contents
of the inquiry with our group companies. In this case, MHI take responsibility
for managing personal information and will not use such information for
purposes other than responding to your inquiry.
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CAUTION
●Read this Operation & Maintenance Manual, and
conduct the engine operation, inspection and
maintenance only after sufficiently understanding
the description.
●Please keep this Operation & Maintenance Manual
with related manuals at a suitable place for quick
reference when needed.
Inquiry About Maintenance
According to the contents of the inquiry, we may share personal information
including your name, address, telephone number, e-mail address and contents
of the inquiry with our group companies. In this case, MHI take responsibility
for managing personal information and will not use such information for
purposes other than responding to your inquiry.
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ndex.html
TP-6853 12/23

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Summary of Contents for Mitsubishi S12R

  • Page 1 For EPA Certified Engine OPERATION & MAINTENANCE MANUAL Issued: December 2023 Pub. No. 291Y1-40720 Revision: 5 CAUTION ●Read this Operation & Maintenance Manual, and conduct the engine operation, inspection and maintenance only after sufficiently understanding the description. ●Please keep this Operation & Maintenance Manual with related manuals at a suitable place for quick reference when needed.
  • Page 2 • Company names or product names described in this Operation & Maintenance Manual are trademarks or registered trademarks of their respective owners in general. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 3: Foreword

    FOREWORD FOREWORD This Operation & Maintenance Manual describes information and basic points required to use the Mitsubishi Diesel Engine (hereinafter called the "engine") correctly and effectively. Please read this manual before using the engine. In addition, operation, inspection and maintenance of the engine must be limited to the persons who understand the contents of this manual sufficiently.
  • Page 4: Important Information

    MHIET group company, or MHIET. cause unexpected damage to the device due to accumulated engine damage if not cause immediate failure. Carefully perform engine operation and maintenance. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 5: Important Tips For Safety Of Work

    Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 6: Important Tips For Managing Safety Of Work

    Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 7: Warranty Provisions

    WARRANTY PROVISIONS WARRANTY PROVISIONS Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (hereinafter referred to as MHIET) shall make a repair or replacement of a failure or damage at no charge, only when the said failure or damage occurs during the warranty period (refer to the individual...
  • Page 8: Emission Warranty

    Warranty Period The emission warranty period is shown below. However, if Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.’s standard warranty period is longer than the emission warranty period, the emission warranty period extends to same as Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.’s standard warranty period.
  • Page 9 EMISSION WARRANTY Warranty Parts Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. warrants the parts which will increase the emission of pollutants when they become defective. The followings are examples. I All the engine parts relating to the systems below are included in the exhaust-gas related components: 1.
  • Page 10: Contact List

    Mitsubishi Heavy Industries 22nd floor, Office Tower 1, Raffles City Changning, (Shanghai) Co., Ltd. (MHISH) No.1133 Changning Road, Changning District, Shang- hai, 200051, China TEL 86-21-6236-9799 FAX 86-21-6841-5222 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 11: Model Name

    Approved Label Side Side Right Side Cylinder No. Fig. 2 Attaching location of Emission Control Approved Label *Above illustration shows S12R nameplate. Fig. 1 Location of Nameplate Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 12: Specifications - Check

    Paper element type Lubricating method Forced lubrication (pressure feed by oil pump) Oil filter Paper element type Oil cooler Water-cooled, multi-plate type Cooling method Forced water cooling Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 13: Detailed Specifications

    Electric type ■ Oil Pan Standard type Large type ■ Engine Oil Capacity L (Oil pan capacity) L (Engine total) ■ Engine Oil Grade Grade ■ Coolant Capacity Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 14: Additional Equipment Of Generator

    ■ Electrical System Control panel, Operation panel, Instrument panel Battery, Battery switch ■ Protection Devices Oil pressure switch Oil filter alarm switch Thermo switch Rotation detection pickup Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 15: Protection Devices Added During Manufacturing The Generator

    SPECIFICATIONS - CHECK Protection Devices Added during Manufacturing the Generator Please compile the information about the protection devices added during manufacturing the generator and attach it on this page. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 16: Definition Of Intended Persons

    Means a person to whom this engine is supplied by MHIET, and who manufactures and sells the generator. This manual is intended for use by the user company, supervisor and operator. For other service documents, refer to "STRUCTURE OF SERVICE DOCUMENTS" (→ Page 17). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 17: Structure Of Service Documents

    Inspection, Repair Overhaul Maintenance Manual Running in Adjustment : No documents available. To be prepared later. : Confirm to the equipment supplier. Fig. 1 Structure of Service Documents Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 18: Table Of Contents

    SAFETY............ENGINE - OUTLINE........OPERATION..........FUEL............ENGINE OIL..........COOLANT..........SCHEDULED MAINTENANCE....INSPECTION AND MAINTENANCE.... LONG-TERM STORAGE......10 TRANSPORTATION........11 TROUBLESHOOTING......... 12 AFTER-SALES SERVICE......13 DISPOSAL..........14 APPENDIX..........Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 19: List Of Models

    Tier 2 Generator Turbocharging (Jacket cooling, air cooling) standards Conformed to EPA Dualline cooling system Y2PTAW-1 exhaust gas Tier 2 Generator Turbocharging (Jacket cooling, air cooling) standards Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 20: Unit Of Measurement

    • JIS = Japanese Industrial Standards • JPI = Japan Petroleum Institute • LLC = Long Life Coolant • MHIET = Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. • MRV = Mini - Rotary Viscometer • OSHA = Occupational Safety and Health Administration •...
  • Page 21 Protective Devices ......... 59 STRUCTURE OF THIS MANUAL... 18 Protective Devices on the Engine ..... 59 Lockout/Tagout ........60 LIST OF MODELS ...... 19 Lockout............60 Tagout ............61 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 22 Operation ..........99 Risk of Fire..........74 Checking during Operation...... 100 Communication with MHIET ......74 Cooling Operation ........ 101 Stopping..........102 Checking after Stopping....... 102 Maintenance Operation......102 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 23 Compliant Generator Use Diesel Engine ... 121 Exhaust Muffler - Drain Water ....165 Pre-cleaner - Check and Service .... 166 Air Cleaner - Check and Service ..... 167 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 24 Exhaust Smoke is Black or Dark Grey..185 Excessive Fuel Consumption....187 Excessive Engine Oil Consumption ..188 Overheating ..........189 Engine Oil Pressure Drop ......190 Engine Stops..........191 During Normal Operation, Thermo Switch Activated........192 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 25 Freezing Temperature of PG GLASSY ...114 Fig. 8-29 Hose Joint ..........139 Fig. 6-3 Tool - Adjust 1 ........114 Fig. 8-30 Banjo Bolt - Install ........ 140 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 26 Fig. 8-69 Center Bolt - Remove ......153 Fig. 8-109 Pre-cleaner - Check for Clogging..166 Fig. 8-70 Element - Pull Out ........153 Fig. 8-110 Pre-cleaner - Remove......166 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 27 Rating Definition (1/2)......119 Table 7-2 MHIET Generator Use Diesel Engine Rating Definition (2/2)......120 Table 7-3 Maintenance Schedule (1/2)....121 Table 7-4 Maintenance Schedule (2/2)....122 Table 8-1 Type of Belt (V-belt)......127 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 28: Safety

    In addition to "Matters to Be Obeyed and Matters tion or information to be em- Prohibited" (→ Page 31), these warnings present phasized. important information for each operation. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 29: Warning/Caution Labels

    * New labels are available at your MHIET dealer, MHIET group company, or MHIET. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 30: Fig. 1-1 Warning/Caution Labels And Their Locations (Examples)

    - Risk of fire 火災のおそれあり。 Keep fire away from fuel and lube oil. 燃料及び潤滑油に火気を近づけないで下さい。 43A93- 51100 Fig. 1-1 Warning/Caution Labels and Their Locations (Examples) Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 31: Matters To Be Obeyed And Matters Prohibited

    (fire, devices. accidents, etc.) including emergency contact points and means of communication. * Delay in action may result in expansion of damage. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 32: Precautions For Covers

    (engine room). explosion-proof lighting equipment without fire. * Otherwise, noise may cause a hearing loss. * Otherwise, they may catch fire, which causes an explosion. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 33: Precautions For Protective Devices

    Charge the battery in a well- ventilated area. * Charging the battery in a poor ventilated area could let hydrogen gas accumulate, which could cause a fire. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 34: Precautions For Warning/Caution Labels

    Never peel off the label at the fuel inlet or other labels that are not allowed to remove. * Doing so may be against the law or regulations. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 35: Operation

    Make sure that no foreign particles get into the air inlet. * They may cause damage to the turbocharger and lead to serious problems in the engine. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 36 Do not remove the strainer while filling the fuel tank. * Otherwise, entry of foreign particles may cause damage to the fuel pump. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 37 * If battery fluid comes into contact with your eyes or skin, it may result in sight loss or burns. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 38 * Otherwise, you may get caught in the rotating parts and get seriously injured or suffer noise- induced hearing loss. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 39 Do not operate the engine at no load or low load for a prolonged period of time. * Otherwise, it may cause deterioration in the exhaust gas properties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 40 * Sulfuric acid corrosion and cooling failure, and result in serious engine problems. * Dilution * Generation of blue-white smoke (mainly during low idle operation) Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 41: Fuel

    * Investigate the cause of abnormality, correct the defect, then restart the engine. Do not race the engine immediately before shutting it down. * Otherwise, the devices may be damaged. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 42 When storing fuel in the container, close its cap tightly. * Otherwise, built-up volatile fuel may be exposed to a flame, which causes an explosion or a fire. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 43: Engine Oil

    When storing engine oil in the container, be sure to close the cap. * Otherwise, built-up volatile engine oil may be exposed to a flame, which causes an explosion or a fire. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 44: Coolant

    Maintenance Manual. * Failure to perform the pre-operation check and scheduled maintenance may cause various engine problems and breakage to parts, which may result in serious accidents. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 45: Inspection And Maintenance

    * If you violate rules, you may be subject to stopped. penalties. * Otherwise, you may get burned by hot engine oil or coolant splashing out. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 46 * Otherwise, a slip may occur, which shortens the service life of the belt. * Otherwise, you may cut your hand by the rotating parts, or be caught in them and injured. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 47 * The fuel drained into the container must be discarded in accordance with the local laws and regulations as well as the manufacturer's SDS. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 48 * If draining the water separator is insufficient, warranty. water may enter into the fuel system, which causes damage to the devices. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 49 When checking the fuel control link, do not insert your finger into the moving parts. * Otherwise, you may get injured. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 50 * The waste cloth used to wipe off engine oil must be discarded in according with the local laws and regulations as well as the manufacturer's SDS. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 51 Check the radiator fins for holes and pump properly. cracks. * Insufficient tightening may cause a coolant leak. * Otherwise, overheating, damage to the devices, or performance degradation may occur. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 52 Take care that parts will not fall down and get caught in the fuel control link. * If parts are caught in the fuel control rack, the engine will become out of control. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 53: Long-Term Storage

    Be sure to drain water from the starting air tank. * Otherwise, water may enter the air motor when starting the engine. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 54: Transportation

    * If battery fluid comes into contact with your eyes or skin, it may result in sight loss or burns. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 55: Troubleshooting

    * Using uncalibrated measurement equipment may cause damage to the devices or performance degradation of them. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 56: Disposal

    Cleansing Act to handle it as a special industrial waste. * It may cause a fire. * It may cause environmental pollution. * If you violate rules, you may be subject to penalties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 57 * If you violate rules, you may be subject to industrial waste. penalties. * It may cause a fire. * It may cause environmental pollution. * If you violate rules, you may be subject to penalties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 58 * Otherwise, fall down of a heavy object due to improper transportation may cause the operator to get injured. * And the waste oil or fluid leak may occur, which could cause environmental pollution. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 59: Protective Devices

    Fig. 1-3 Thermo Switch equipment and specifications. Check the protective devices of your engine at first. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 60: Lockout/Tagout

    Fig. 1-5 Rotation Detection Pickup • The operator in charge must hold the key so that other operators will not be able to open the lock. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 61: Tagout

    Bleed air trapped in the air starter system (starting air tank, starting air compressor) to release the residual pressure. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 62: Working Procedure In Dangerous Areas

    • Tags must be hanged, as necessary, by considering the number of the operators, difficulties to check the presence of each other, or the working times. Conduct the works. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 63: Body Protection

    • Plastic gloves (when handling the instruction of SDS "Dangerous and dangerous and toxic chemicals) Hazardous Chemicals" (→ Page 71). • Safety belt (when working at the high position) Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 64: Product-Specific Precautions

    "ON" after completing the work. Start up the engine only after the coolant temperature reaches the proper temperature (35°C [95°F] or more). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 65: Develop The Action Procedure To Obey In The Event Of Emergency

    If the stop switch of the generator will not function and the engine will not stop by using the manual stop lever, shut off fuel supply. * Otherwise, extent of the damage may increase. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 66: Emergency Stopping Devices Installed During Manufacturing The Generator

    Emergency Stopping Devices Installed during Manufacturing the Generator The user company must compile the information about the emergency stopping devices installed during manufacturing the generator and attach it here. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 67: Measures In The Event Of Personal Injuries Resulting From This Engine

    In order to prevent the damage from spreading, stop the engine operation after the disaster occurred and follow the instruction by your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 68: Measures In The Event Of Environmental Disaster

    * To extinguish engine fire, you should use an ABC dry-powder fire extinguisher which has the effect of suppressing of both of oil and electrical fires. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 69: Measures In The Event Of An Earthquake Disaster

    Falling objects near and inside of the engine Condition of pipings and wirings Abnormality of electric power • If any abnormalities are found, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 70: Occupational Health And Safety Management

    Fig. 1-16 Education and Training for Safety Fig. 1-15 Operation & Maintenance Manual - Understand and Obey Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 71: Dangerous And Hazardous Chemicals

    ■ Contents of SDS (Safety Data Sheet) SDS contains detailed information on health and safety hazards, environmental impacts, safe handling methods, emergency response, etc. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 72: Noise

    Preparation of facilities such as a cubicle (bonnet) is recommended. Fig. 1-18 Noise • For the noise level, refer to the factory test results statement held by the generator supplier. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 73: Vibration

    Fig. 1-19 Vibration Fig. 1-20 To Maintain Cleanliness and Tidiness • For the vibration level, refer to the factory test results statement held by the generator supplier. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 74: Risk Of Fire

    • If you establish the protection measures, use this Operation & Maintenance Manual and warning labels on this engine and each device as "Usage Information". Fig. 1-21 Fire Hazard Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 75: Engine - Outline

    Names of Parts Refer to the pages corresponding your engine type. S12R-Y1PTA, S12R-Y1PTA-2, S12R-Y1PTA-3, S12R-Y1PTA-4ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ S12R-Y1PTA2-1, S12R-Y1PTA2-2ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ S12R-Y2PTAW, S12R-Y2PTAW-1ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 76: S12R-Y1Pta, S12R-Y1Pta-2, S12R-Y1Pta-3, S12R-Y1Pta-4

    Governor oil filter (14) Turbocharger Bypass oil filter (15) Exhaust pipe Inlet and Lubrication system exhaust systems Oil pan Exhaust outlet Engine oil drain port Oil pump Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 77 Priming pump/ (16) Coolant inlet Cooling system Fuel feed pump (17) Coolant drain cock Fuel system Fuel filter Fuel control link Fuel inlet (10) Fuel return port Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 78: S12R-Y1Pta2-1, S12R-Y1Pta2-2

    (11) Water pump Breather (12) Intake port Bypass oil filter (13) Turbocharger Lubrication system Oil pan (14) Exhaust outlet Inlet and exhaust systems Engine oil drain port Oil pump Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 79 (16) Coolant drain cock Fuel feed pump Starting system (17) Starter Fuel system Fuel filter Electric system (18) Alternator Fuel control link Fuel inlet (10) Fuel return port Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 80: S12R-Y2Ptaw, S12R-Y2Ptaw-1

    Engine oil drain port (14) Water pump Oil pump for air cooler (15) Intake port Inlet and (16) Turbocharger exhaust system (17) Exhaust outlet Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 81 (14) Air cooler coolant inlet Fuel system Fuel feed pump (15) Coolant drain cock Fuel filter Starting system (16) Starter Fuel control link Electric system (17) Alternator Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 82: Protection System - Location

    2 ENGINE - OUTLINE Protection System - Location Refer to the pages corresponding your engine type. S12R-Y1PTA, S12R-Y1PTA-2, S12R-Y1PTA-3, S12R-Y1PTA-4ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ S12R-Y1PTA2-1, S12R-Y1PTA2-2ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ S12R-Y2PTAW, S12R-Y2PTAW-1ꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏꞏ Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 83: S12R-Y1Pta, S12R-Y1Pta-2, S12R-Y1Pta-3, S12R-Y1Pta-4

    ■ Left Side View (*This illustration is for air direct inlet type) Name Name Oil pressure switch Rotational detection pickup Thermo switch Manual stop lever Oil filter alarm switch Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 84: S12R-Y1Pta2-1, S12R-Y1Pta2-2

    S12R-Y1PTA2-1, S12R-Y1PTA2-2 ■ Right Side View ■ Left Side View Name Name Oil pressure switch Rotational detection pickup Thermo switch Manual stop lever Oil filter alarm switch Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 85: S12R-Y2Ptaw, S12R-Y2Ptaw-1

    S12R-Y2PTAW, S12R-Y2PTAW-1 ■ Right Side View ■ Left Side View Name Name Oil pressure switch Rotational detection pickup Thermo switch Manual stop lever Oil filter alarm switch Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 86: Starting And Stopping Devices Installed During Manufacturing The Generator

    "Safety Manual". Please compile the information about the starting and stopping devices as well as operation panels installed during manufacturing the generator and attach it on this page. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 87: Operation

    • Damper Temperature - Check Common • Manual Turning Gear - Check Common • Air Direct Admission Starting - Check Air direct • Air Motor Starting - Check Air motor Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 88: Daily Check

    * It may cause a fire. Do not place flammable substances such as fuel and engine oil around the engine. * It may cause a fire. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 89 When operating the engine in an environment possibly exposed to strong electromagnetic fields, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 90: Engine Exterior - Check

    * Defective contact or short circuit may cause conditions. damage to the devices. • Fuel feed valve: open • Coolant drain cock (plug): closed • Engine oil drain valve: closed Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 91: Pre-Operation Check

    Check the fuel tank oil level. Refuel the fuel tank to the upper limit of the specified quantity. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 92: Fuel Control Link - Check

    * If the coolant level is low, overheat or cavitation in the engine may occur. Check the battery fluid specific gravity. • Charge the battery, if necessary. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 93: Pre-Cleaner - Check For Clogging

    Table 3-1 Limit Temperature of Damper Type of damper Continuous Emergency use use engine engine Viscous damper 90°C [194°F] 100°C [212°F] Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 94: Manual Turning Gear - Check

    • If it is not supplied by MHIET, follow the instructions in the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 95: Air Motor Starting - Check

    • If it is not supplied by MHIET, follow the instructions in the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 96: Engine Start-Up

    Restart the engine after 2 minutes interval. • Is the air pressure gauge in order? • Is a leak found from the air system? Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 97: Air Motor Starting

    Open the main valve of the starting consecutive trials, contact your air tank. MHIET dealer "CONTACT LIST" (→ Page 10). After the engine has started, close the main valve of starting air tank. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 98: Warm-Up Operation

    * Otherwise, a fire or damage to the devices may occur. * It may cause carbon monoxide intoxication or environmental pollution. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 99: Operation

    30% or less of the rated output is conducted. or low load for a prolonged period of time. * Otherwise, it may cause deterioration in the exhaust gas properties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 100: Checking During Operation

    * Continued use of the engine without any remedy may cause defective battery charge and cooling failure, and result in serious engine problems. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 101: Cooling Operation

    Checking by means of a non-contact thermometer (thermo gun) is recommended. • If any abnormality is found, refer to "11 TROUBLESHOOTING" (→ Page 178) and correct the defect. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 102: Stopping

    • Fuel injection pump and governor rack movement • Damper temperature and external view • If any abnormality is found, refer to "11 TROUBLESHOOTING" (→ Page 178) and correct the defect. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 103: Fuel

    Fuel Properties Limit Table" (→ Page 104). requirements specified in "Fuel Quality Standard" (→ Page 106). Do not mix and use fuels of different types and/or manufacturers. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 104: Diesel Fuel

    DIN 51601 DIESEL-FUEL Special No.1,No.1, No.2, JIS K 2204 DIESEL FUEL No.3, Special No.3 ULTRA LOW EN 590 DIESEL-FUEL SULFUR FUEL ONLY Fig. 4-1 ULSD Label Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 105: Fuel - Handling

    • When filling the fuel tank, be sure to use a strainer so that foreign particles will not enter. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 106: Fuel Quality Standard

    (dark discoloration) (dark discoloration) 0.83 to 0.87 g/cm 0.80 to 0.87 g/cm JIS K 2249 Density 15°C [59°F] [51.82 to 54.31 lb/ft [49.94 to 54.31 lb/ft ISO 3675 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 107: Table 4-5 Fuel Properties Table (2/2)

    • Operating the engine at no load or low load (load factor 30% or less) for a prolonged period of time is avoided. *3: If the sulfur content of using fuel is higher than 0.2 mass%, use the specified engine oil "5 ENGINE OIL" (→ Page 109). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 108 For details, refer to ‘Technical Information’. For Engine warranty coverage, refer to Limited Warranty conditions in this manual. *5: Disregarding the value in may result in serious accident. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 109: Engine Oil

    2009 and meets "Engine Oil Quality Standards" (→ Page 198). • When using a CH-4 grade oil, the sulfur content of fuel must be 0.2 mass% or less. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 110: Engine Oil Viscosity

    • Be sure to obtain the SDS of the engine oil to be or a fire. used and follow the instructions in the SDS. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 111: Coolant

    • In addition to the items specified above, turbidity must be below 15 mg/L. • Basically, the water quality should be within the range of the recommended values, however, up to the limit value is acceptable. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 112: Llc To Be Used

    Do not use antifreeze alone instead of LLC. For details, refer to "Examples of Abnormalities Caused by LLC (Amine Type)" (→ Page 208). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 113: Maintenance Of Llc

    GLASSY • If coolant is refilled without proper stirring, partially contrasting density of the LLC concentration may occur, which interferes with the sufficient anti-corrosion and cooling properties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 114: Llc Concentration In Coolant - Measure

    Fig. 6-2 Freezing Temperature of PG GLASSY • When using the other LLC follow the Fig. 6-4 Tool - Adjust 2 instruction manual of LLC to be used. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 115: Measurement

    Fig. 6-9 LLC Concentration Measurement 1 Close the daylight plate slowly. 1.35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 Fig. 6-10 LLC Concentration Measurement 2 Fig. 6-7 Tool - Adjust 5 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 116: Llc Concentration Measurement 3

    Read the scale at the position where the blue boundary line comes across. 1.35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 Fig. 6-13 LLC Concentration Measurement 5 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 117: Scheduled Maintenance

    For example, in the 2000 hour interval, check and service the items listed in every 50, 250, 500, and 1000 hours. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 118: Category Of Scheduled Maintenance Chart

    For the emergency use engine, perform the scheduled maintenance in accordance with the "Scheduled Maintenance for Emergency Use Engines". In addition, carry out maintenance operation regularly. "Maintenance Operation" (→ Page 102) Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 119: Rating Definition

    *6: The DCP rating is consistent with the requirement of Tier III and Tier IV under the Uptime Institute. *7: Conditions are consistent with the requirements under ISO 8528-1:2018. This document is subject to change without prior notification. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 120: Table 7-2 Mhiet Generator Use Diesel Engine Rating Definition (2/2)

    *6: The DCP rating is consistent with the requirement of Tier III and Tier IV under the Uptime Institute. *7: Conditions are consistent with the requirements under ISO 8528-1:2018. This document is subject to change without prior notification. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 121: Scheduled Maintenance For Epa Compliant Generator Use Diesel Engine

    Check Water Pump Check Cooling Coolant Properties Inspect (Change Coolant System Based on Analysis Results) Starter Check Electrical System Alternator Check Protection System Check Auxiliary Devices Check Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 122: Table 7-4 Maintenance Schedule (2/2)

    Every 8 years Water Pump Unit Seal and Oil Seal Replace Turbocharger Disassemble and Inspect Air Cooler Disassemble and Clean Stop Solenoid Check or Replace Other Consumable Parts Replace Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 123: Inspection And Maintenance

    • Engine Oil - Change • Oil Filter - Replace • Bypass Oil Filter - Replace • Governor Oil Filter - Replace (Hydraulic governor spec) • Oil Pipe - Check Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 124: Precautions For General Inspection And Maintenance

    * It may cause environmental pollution. * Otherwise, you may get burned by hot engine * If you violate rules, you may be subject to oil or coolant splashing out. penalties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 125: Inspection And Maintenance - Prepare

    While operating the engine, stay away from the moving parts. * Otherwise, you may cut your hand by the rotating parts, or be caught in them and injured. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 126: Inspection And Maintenance - Prepare (With Engine Switched Off)

    * If the belt has been stretched, the battery cannot be charged and DC power supply will be lost. Check each belt for the crankshaft pulley or alternator in the engine. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 127: Belt Tension - Adjust (V-Belt)

    98 N {9.99 kgf} [22.03 lbf] to 147N V-belt {14.99 kgf} [33.05 lbf], the deflec- tion of the belt must be 10 to 15 mm [0.39 to 0.59 in.]. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 128: Belt Tension (Alternator) - Adjust

    Turn the turn buckle (4) of the adjusting bolt to adjust the belt tension. Fig. 8-5 Belt Cover - Remove Fig. 8-8 Belt Tension - Adjust (Turn Buckle) Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 129: Belt Tension - Adjust (Lock Nut)

    Step 2. • Tool: Wrench Fig. 8-12 Front Cover - Install Fig. 8-10 Belt Tension - Adjust (Retaining Bolt) Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 130: Table 8-3 Ribbed Belt Tensile Force

    • The pressing force when the midpoint of belt straight line is pressed by using the gauge with 10 mm [0.39 in.] wide and the belt is deflected by 15 mm [0.59 in.]. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 131: Damper - Check

    • Paint discoloring with heat • Peeling Fig. 8-13 Damper - Check • If the damper is defective, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 132: Thermo Label - Stick

    "CONTACT LIST" (→ Page 10). • For the temperature limit of the damper, refer to "Table8-4 Limit Temperature of Damper" (→ Page 131). Fig. 8-14 Thermo Label - Stick Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 133: Fuel System - Check

    "Fuel System - the scope of our supply, refer to the Bleed Air" (→ Page 134). corresponding manual of the generator and the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 134: Fuel System - Bleed Air

    • For the devices and equipment outside the scope of our supply, refer the corresponding manual of the generator and the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 135: Priming Pump

    Fig. 8-18 Priming Pump - Operation <A-type> Retightened by 80 to 100°. • Tool: Adjustable wrench 80 to 100° Fig. 8-16 Priming Pump - Operation <A-type> Fig. 8-19 Priming Pump - Operation <A-type> Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 136: Priming Pump - Operation

    For the details, refer to such a Fig. 8-23 Fuel Filter - Bleed Air (2) document as the corresponding manual of the generator and the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 137: Fuel Injection Pump - Bleed Air 1

    Fig. 8-26 Fuel Injection Pump - Bleed Air 3 Fig. 8-25 Fuel Injection Pump - Bleed Air 2 • Prepare a plastic tube (6 mm [0.24 in.] in diameter, approx. 2 m [78.74 in.] long). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 138: Water Separator - Check And Service

    * If draining the water separator is insufficient, water may enter into the fuel system, which causes damage to the devices. Drain water from the water separator. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 139: Gauze Filter - Clean

    • Always replace the sealing washer with a • Tool: Wrench new one once it is disturbed. Fig. 8-27 Banjo Bolt - Remove Fig. 8-29 Hose Joint Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 140: Fuel Filter - Replace

    * Failures or damages caused by using non- 軽油用 genuine parts will be outside the scope of the No. warranty. Fig. 8-31 Around Fuel Filter - Clean Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 141 Filter - Bleed Air" (→ Page 136). Check the fuel control link "Fuel Control Link - Check" (→ Page 142). Fig. 8-34 Fuel Filter Installing Surface - Clean Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 142: Fuel Control Link - Check

    13 Discard fuel in the container in Step 2 properly. Fig. 8-38 Fuel Control Link - Check • If there is play or looseness, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 143 (→ Page 10). Fig. 8-40 Manual Stop Lever - Check • If the lever cannot be returned back smoothly, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 144: Fuel Pipe - Check

    Tighten the nut, and fix the ball joint. Location" (→ Page 145) • Replace the nut with a new one. • Tool: Wrench Fig. 8-44 Ball Joint - Fix Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 145 Clamp Clamp Clamp Clamp Sheet Plate Plate Plate Clamp Plate Plate Clamp Clamp Sheet Plate Clamp Plate Fig. 8-46 High Pressure Fuel Injection Pipe Clamp - Location Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 146: Engine Oil System - Check

    (5) of the to the corresponding manual of the clip (4) toward the R side of the clamp generator and the supplier's operation (1). manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 147: Engine Oil - Change

    • Use the engine oil analysis service . • if the engine oil is contaminated with fuel or water, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 148 * If kinematic viscosity of engine oil increases, fuel consumption may increase. Remove the oil filler cap (1). Fig. 8-54 Engine Oil - Apply (Valve Mechanism) Fig. 8-52 Oil Filler Cap - Remove Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 149 Fig. 8-57 Engine Oil Level - Check Insert the oil level gauge fully into the oil level gauge guide and then pull it out slowly. Fig. 8-56 Rocker Cover - Install Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 150 Check the engine oil system including the oil pan for leak of engine oil. • If there are any leaks, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 151: Oil Filter - Replace

    * The waste cloth used to wipe off engine oil must be discarded in according with the local laws and regulations as well as the manufacturer's SDS. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 152 • Cut the removed oil filter and check the element. If metal particles are found, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Fig. 8-66 Oil Filter - Install Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 153: Bypass Oil Filter - Replace

    1) Loosen the air vent plug (1). 2) Remove the drain plug (2). Engine oil is drained. Fig. 8-70 Element - Pull Out Fig. 8-67 Engine Oil - Drain Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 154: Element - Install

    Step 4. install the air vent plug (1). • Tool: Wrench • Tool: Wrench Fig. 8-73 Oil Pipe - Install Fig. 8-76 Air Vent Plug - Install Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 155: Oil Pipe - Check

    • For the devices and equipment outside dealer "CONTACT LIST" (→ Page 10). the scope of our supply, refer to the corresponding manual of the generator and the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 156: Corresponding Devices - Location

    (2) on the water pump and fix with a band. Fig. 8-80 <S12R-Y1PTA - Left-Side View> Fig. 8-82 Coolant Drain Cock on Water Pump Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 157: Container To Receive Coolant

    Open the coolant drain cock (1) on the engine body. Coolant is drained. Fig. 8-84 Coolant Drain Cock on Water Pump Fig. 8-87 Coolant Drain Cock on Engine Body Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 158: Coolant Drain Cock On Water Pump

    (2) on the engine body and water Fig. 8-88 Coolant Drain Cock on Water Pump pump. Fig. 8-89 Coolant Drain Cock on Engine Body Fig. 8-90 Coolant Drain Cock on Water Pump Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 159: Coolant Drain Cock On Water Pump

    • Prepare a plastic tube (5 mm [0.20 in.] in diameter, approx. 1 m [39.97 in.] long) and a band. Fig. 8-94 Coolant Drain Cock on Water Pump Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 160: Coolant Drain Cock On Engine Body

    Fig. 8-97 Coolant Drain Cock on Water Pump • Prepare a plastic tube (5 mm [0.20 in.] in diameter, approx. 1 m [39.37 in.] long) and a band. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 161: Container To Receive Tap Water

    Step 6. Fig. 8-99 Coolant Drain Cock on Engine Body 13 Discard water in the container or cleaning solution properly. Fig. 8-100 Coolant Drain Cock on Water Pump Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 162 Close the coolant filler cap properly. Bleed air from the fuel system Fig. 8-104 Coolant Drain Cock on Water Pump "Cooling System - Bleed Air" (→ Page 163). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 163: Cooling System - Bleed Air

    System - Location" (→ Page 82). Pause for about 1 minute. Repeat the operation of Step 1 and 2 for 2 or 3 times. Coolant will reach each part. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 164: Radiator Fins - Check And Clean (Radiator Spec)

    If dust or dirt remains, the performance of the radiator will be decreased, leading to overheating. Recommended cleaning intervals: clean at the time of engine oil change. Fig. 8-106 Radiator Fin Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 165: Intake And Exhaust Systems - Check

    For the details, refer to the MHIET dealer "CONTACT LIST" (→ corresponding manual of the generator Page 10). and the supplier's operation manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 166: Pre-Cleaner - Check And Service

    Fig. 8-111 Pre-cleaner - Clean 1 Rinse the pre-cleaner with fresh water. • Discard the rinsed water properly. Fig. 8-109 Pre-cleaner - Check for Clogging Fig. 8-112 Pre-cleaner - Clean 2 Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 167: Air Cleaner - Check And Service

    ■ Air Cleaner Element - Clean Clean the air cleaner element. • If necessary, replace the air cleaner element with a new one. Fig. 8-114 Pre-cleaner - Install Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 168 Check the battery fluid specific • If the starter is damaged or defective, gravity. contact your MHIET dealer "CONTACT • Charge the battery, if necessary. LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 169 Close the main valve of the starting air tank. The air supply stops. While cranking the engine lightly, bleed air remaining in the engine and the starting air system. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 170 Open the main valve of starting air starting air motor to remove the tank slowly. dust. This allows air to be supplied. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 171: Long-Term Storage

    * When handling grease, obey the to the devices. manufacturer's SDS. * Follow the storage procedure described in this Operation & Maintenance Manual. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 172 Operate the start switch of the generator "Starting and Stopping Devices Installed during Manufacturing the Generator" (→ Page 86) to start the engine. Close the fuel valve. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 173 Check battery fluid level, and then charge the battery once a month. Fig. 9-1 Rocker Cover - Remove Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 174 Operate the engine under load. Storing Engine in Operable Condition Perform maintenance operation "Maintenance Operation" (→ Page 102) once a month. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 175: 10 Transportation

    The above-mentioned description is based on the premise that this engine is used in Japan. Obey the laws or regulations of each country where this engine is actually used. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 176 • Consider the engine's center of gravity to lift the engine. Slowly lower the engine on to a rack for transport. Fix the engine to a rack for transport. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 177 [2.36 in.] 210 mm 210 mm [8.27 in.] Crankshaft Hanger [8.27 in.] Center Center of Gravity Center of Gravity Center of Gravity Fig. 10-1 Engine's Center of Gravity Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 178: 11 Troubleshooting

    Always maintain cleanliness and tidiness. * Otherwise, a tumbling accident may occur. * Wear proper protective gears for the work. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 179 10). Use correct tools, and perform work with the utmost care. If you misjudge the weight, you may damage the part by dropping it, or get injured. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 180: Table 11-1 Starter Does Not Crank Or Cranks Slowly, Resulting In Starting Failure

    Excessive oil level • Engine Oil Level - Check • Check lubrication system. Engine Body Wear or lock of slid- • Contact your MHIET dealer. ing parts Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 181: Table 11-2 Starter Cranks, But Engine Does Not Start

    • Contact your MHIET dealer. Engine Body Compression pres- • Contact your MHIET dealer. sure drop Additional Water heater • Check water heater switch Equipment switch "OFF" Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 182: Table 11-3 Output Shortage (1/2)

    • Contact your MHIET dealer. Increase of ex- • Turbocharger - Check haust resistance • Check exhaust pipes, muffler and silencer. • Contact your MHIET dealer. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 183: Table 11-4 Output Shortage (2/2)

    Engine Body Compression • Contact your MHIET dealer. pressure drop Faulty valve timing Wear of sliding parts Additional Water heater • Check water heater switch Equipment switch "OFF" Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 184: Table 11-5 Exhaust Smoke Is White Or Blue

    • Contact your MHIET dealer. Engine Body Faulty valve timing • Contact your MHIET dealer. Compression pres- sure drop Additional Water heater • Check water heater switch. Equipment switch "OFF" Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 185: Table 11-6 Exhaust Smoke Is Black Or Dark Grey

    • Contact your MHIET dealer. Increase of ex- • Turbocharger - Check haust resistance • Check exhaust pipes, muffler and silencer. • Contact your MHIET dealer. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 186: Table 11-7 Exhaust Smoke Is Black Or Dark Grey (2/2)

    Grey • Check boost compensator. • Contact your MHIET dealer. Engine Body Compression • Contact your MHIET dealer. pressure drop Faulty valve timing Wear of sliding parts Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 187: Table 11-8 Excessive Fuel Consumption

    • Check exhaust pipes, muffler and silencer. • Contact your MHIET dealer. Engine Body Compression pres- • Contact your MHIET dealer. sure drop Faulty valve timing Wear of sliding parts Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 188: Table 11-9 Excessive Engine Oil Consumption

    Control System Excessive load • Check control system and governor controller. • Contact your MHIET dealer. Engine Body Wear of sliding • Contact your MHIET dealer. parts Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 189: Table 11-10 Overheating

    • Check fuel injection pump rack stroke. • Check control system and governor controller. • Contact your MHIET dealer. Engine Body Wear of sliding • Contact your MHIET dealer. parts Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 190: Table 11-11 Engine Oil Pressure Drop

    • Check fuel injection pump rack stroke. • Contact your MHIET dealer. Engine Body Increased wear of • Contact your MHIET dealer. sliding parts Increased clear- ance of sliding parts Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 191: Table 11-12 Engine Stops

    "Fuel System - Bleed Air" (→ Page 134) Operate the start switch of the generator "Starting and Stopping Devices Installed during Manufacturing the Generator" (→ Page 86) start the engine. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 192: Table 11-13 During Normal Operation, Thermo Switch Activated

    Check the coolant temperature. If no fault has been found, restart the engine. • If any fault is found, contact your MHIET dealer "CONTACT LIST" (→ Page 10). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 193 Warranty Policy. • When the warranty period is expired, parts which will be usable, if repaired, can be repaired at your request and cost. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 194: 13 Disposal

    Cleansing Act to handle it as a special penalties. industrial waste. * It may cause a fire. * It may cause environmental pollution. * If you violate rules, you may be subject to penalties. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 195 * If battery fluid comes into contact with your eyes or skin, it may result in sight loss or burns. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 196 * It may cause a fire. * It may cause environmental pollution. * If you violate rules, you may be subject to penalties. Fig. 13-1 Engine Body - Disposal Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 197 • If you use the engine oil which does not meet "Engine Oil Quality Standards" (→ Page 198), the warranty will become invalid for failures caused by the engine oil. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 198: Table 14-1 Engine Oil Quality Standards (Grade Cf Sae 30)

    * : Temperature of aluminum panel: 300°C [572°F] and 325°C [617°F], Temperature of engine oil: 100°C [212°F], Splatter time: 15 seconds, Downtime: 45 seconds, Test time: 8 hours. The properties are the weight of solid product accumulated on the panel. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 199: Table 14-2 Engine Oil Quality Standards (Grade Cf Sae 15W-40)

    * : Temperature of aluminum panel: 300°C [572°F] and 325°C [617°F], Temperature of engine oil: 100°C [212°F], Splatter time: 15 seconds, Downtime: 45 seconds, Test time: 8 hours. The properties are the weight of solid product accumulated on the panel. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 200: Table 14-3 Engine Oil Quality Standards (Grade Ch-4 Sae 15W-40)

    150°C [302°F] mPaꞏS 3.7 or more ASTM D 4741 viscosity Carbon residue content 2.0 or less Hot tube test * 4.0 or more *: 300°C [572°F], 16 hours Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 201 (such as cylinder liner and bearing) due to sulfur content, and the piston ring seizure due to sludge. ■ Water Content Water in oil promotes corrosion/wear, and decreases lubricity in sliding parts. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 202: Table 14-4 Engine Oil Properties

    180 or more [356 or more] ISO 3679 ISO 2719 Pentane insolubles mass% 0.5 or less ASTM D893 Coagulated pentane mass% 3.0 or less ASTM D893 insolubles Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 203: Table 14-5 Engine Oil Service Limits For Emergency Use

    * : The maximum head drop means a vertical distance from the center of the fuel injection pump drive shaft to the fuel level of the fuel tank (fuel day tank) when fuel is filled up to the upper limit. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 204 LLC is stored in the container for 6 months. • LLC must be free from any abnormalities such as precipitates when kept in -20 to -25°C [-4 to - 13°F] temperature. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 205: Table 14-6 Llc Specifications (1/3)

    0.5% by volume in aqueous solution Precipitation liquid after or less test No significant discoloration. No sig- Visual inspection of liquid nificant changes such as separation and gel generation. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 206: Table 14-7 Llc Specifications (2/3)

    Free from any malfunction, liquid Pump seals leak, and abnormal noise during op- Condition of eration. parts Pump case inner surfaces and Free from significant corrosion. blades Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 207: Table 14-8 Llc Specifications (3/3)

    Storage stability (% by volume in aqueous solution)(30% by volume in 0.3 or less aqueous solutions, room temperature 6 hrs) * : Means International Rubber Hardness Degrees (IRHD). Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 208 Brass and solder tend to corrode faster than other metals, and corrosion of these metals is said to cause troubles such as water leak and clogging in the heat exchanger. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 209 14 APPENDIX This is a blank page. Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL Pub. No. 291Y1-40720 Revision: 5...
  • Page 210 REVISION HISTORY REVISION HISTORY Mitsubishi Diesel Engine S12R Title OPERATION & MAINTENANCE MANUAL 291Y1-40720 Pub. No. Revision Issued Description January 2018 First edition issued. May 2019 Correction of description on the cover. March 2020 Changed Rating Definition. • Add "QRcode" in Cover page.
  • Page 211 OPERATION & MAINTENANCE MANUAL Issued in December 2023 Pub. No. 291Y1-40720 Revision: 5 Issued by Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. 3000, Tana, Chuo-ku, Sagamihara, Kanagawa, 252-5293, Japan Edited by MHI Sagami High-tech LTD. Printed and bound by Fuji Film Service Link Co., Ltd.
  • Page 212 Printed in Japan Copyright © 2018 MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD. All Rights Reserved.
  • Page 214 TP-6853 12/23...

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