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Moteurs Baudouin 12M26 Series Operation & Maintenance Manual

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12M26 Series Gas Engine
Operation & Maintenance Manual

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Summary of Contents for Moteurs Baudouin 12M26 Series

  • Page 1 12M26 Series Gas Engine Operation & Maintenance Manual...
  • Page 2 Operation & Maintenance Manual for 12M26 Series Gas Engine Foreword 12M26 series natural gas engine for power generation is made by improving the previous Baudouin M26 series engine for power generation through removing of engine fuel system and adding of gas supply system and relevant devices. This natural gas...
  • Page 3 Operation & Maintenance Manual for 12M26 Series Gas Engine Dear customers, Welcome to use Weichai products! Thanks for your love to Weichai products! Please read carefully the operation & maintenance manual of the natural gas engine and operate it in strict accordance with relevant specifications so that you can operate and maintain it properly.
  • Page 4 Operation & Maintenance Manual for 12M26 Series Gas Engine make and model as original ones; otherwise, Weichai will not be responsible for any consequences.

  • Page 5: Instruction Of The Installation

    Operation & Maintenance Manual for 12M26 Series Gas Engine Instruction of the installation 1) This natural gas engine has undergone factory inspection according to the test specifications in a strict way. Do not adjust any ECU data or increase the power of natural gas engine arbitrarily;...
  • Page 6 Operation & Maintenance Manual for 12M26 Series Gas Engine...
  • Page 7 Operation & Maintenance Manual for 12M26 Series Gas Engine Before maintenance and repair, please notice that: ◆Avoid repeated exposure to used oil for a long time. ◆If possible, wear protective clothing and waterproof gloves. ◆Do not keep oil-soaked rags in the pocket.

  • Page 8: Table Of Contents

    5.1Diagnostic method ............................... 47 5.4 Common faults and trouble removal ........................47 APPENDIX 1 RECOMMENDED TORQUE FOR MAIN BEARING BOLTS OF 12M26 SERIES ..........50 APPENDIX 4 Q/WCQTG0007 “SPECIFICATION OF SPARK PLUG REMOVAL AND REFITTING OF WEICHAI NATURAL GAS ENGINE” ................................54...
  • Page 9 Operation & Maintenance Manual for 12M26 Series Gas Engine I. Scope ..................................54 II. Normative references ............................... 54 III. Requirements and steps for removal and refitting of spark plug ................54 APPENDIX 3 CORRECTION COEFFICIENT OF POWER OF ENGINE ................60 APPENDIX 4 CORRECTION COEFFICIENT OF POWER OF ENGINE ................

  • Page 10: Chapter 1 Structure And Property Of The Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine Chapter 1 Structure and property of the engine 1.1Model Meaning of M26 series industrial engine Model Meaning of M26 engine： XM26 Model (varity) Emission level Overload Power(kW) Electricity generation Product Series 1.2 Size of M26 series industrial engine...
  • Page 11 Operation & Maintenance Manual for 12M26 Series Gas Engine Fig1-1 Outside drawing of 12M26 natural gas engine...
  • Page 12 Operation & Maintenance Manual for 12M26 Series Gas Engine Fig1-2 Outside drawing of 12M26 natural gas engine...
  • Page 13 Operation & Maintenance Manual for 12M26 Series Gas Engine Fig1-3 Outside drawing of 12M26 natural gas engine...
  • Page 14 Operation & Maintenance Manual for 12M26 Series Gas Engine Fig1-4 Outside drawing of 12M26 natural gas engine...

  • Page 15: Main Uses Of M26 Series Industrial Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine 1.3 Main uses of M26 series industrial engine M26 series industrial engine was widely used in electric power equipment, pump power, compressor power, oil and other industries, but Cross-industry application is prohibited.
  • Page 16 Operation & Maintenance Manual for 12M26 Series Gas Engine Table 1-2 Main performance parameters of 12M26 natural gas engine Category Unit 12M26 natural gas engine Engine model 12M26 12M26D605E300NG 12M26D660E301NG V-engine, 4-stroke water-cooling, wet sleeve, Venturi mixture, Type — closed-loop control, sparking plug ignition Number of cylinder —...

  • Page 17: Schematic Diagram Of 12M26 Series Natural Gas Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine 1.5 Schematic diagram of 12M26 series natural gas engine 1. Fan; 2. Pre-supplying oil pump; 3. Ingnition coil; 4.Oxygen sensor; 5. Exhaust pipe; 6.Turbocharger; 7.EFR; 8. Air filter; 9.Starting motor; 10. Oil filler and dipstick; 11.Oil...
  • Page 18 Operation & Maintenance Manual for 12M26 Series Gas Engine 1.Belt pulley；2. Gas inlet...
  • Page 19 Operation & Maintenance Manual for 12M26 Series Gas Engine 1. Engine support bracket；2. Flywheel housing；3. Flywheel...
  • Page 20 Operation & Maintenance Manual for 12M26 Series Gas Engine 1. ECU；2. Oil pan；3. Engine support bracket...

  • Page 21: Chapter 2 Natural Gas Engine Control System

    Operation & Maintenance Manual for 12M26 Series Gas Engine Chapter 2 Natural Gas Engine Control System 2.1 Schematic diagram of natural gas control system Figure 2-1 12M26 electronic control schematic diagram...
  • Page 22 Operation & Maintenance Manual for 12M26 Series Gas Engine Figure 2-2 12M26 electronic control schematic diagram...

  • Page 23: Engine Control System Main Parts Technical Requirements And Installation Requirements

    Operation & Maintenance Manual for 12M26 Series Gas Engine 2.2 Engine control system main parts technical requirements and installation requirements 2.2.1. Pressure reducer Technical parameters: 1.Inlet pressure: 1 bar～2bar;（Depending on the custom’s air source ， pressure regulator is different. And the pressure of inlet is subject to pressure regulator）...
  • Page 24 Operation & Maintenance Manual for 12M26 Series Gas Engine Installation requirements: ●Gas filter installation position must be convenient for repair, cleaning and replacement. ●Within filter service life, pressure drop shall be less than 20kPa to guarantee system performance. ● Pay attention to arrow pointed airflow direction during installatio.
  • Page 25 Operation & Maintenance Manual for 12M26 Series Gas Engine Installation requirements: ●Wiring harness is not allowed to be laid at exhaust pipe side to avoid high temperature damage. Wiring harness is more than 150mm away from exhaust pipe and vortex end of turbocharger.
  • Page 26 Operation & Maintenance Manual for 12M26 Series Gas Engine parameters, including air input, ignition advance angle, etc. Control requirements of these parameters need engine control unit (ECU) to know engine’s camshaft position (for example which cylinder is ignited) and revolving speed.
  • Page 27 Operation & Maintenance Manual for 12M26 Series Gas Engine 2.2.9. Oxygen sensor (UEGO) Figure 2-11 Oxygen sensor The oxygen sensor is used to measure the oxygen content in the exhaust gas and convert the measured value into electrical signal and sent the signal to ECU. ECU adjusts the fuel supply amount by adjusting the injection pulse width according to the air-fuel ratio set in the pulse chart, achieving the closed-loop control against the engine.
  • Page 28 Operation & Maintenance Manual for 12M26 Series Gas Engine Figure 2-12 Angle between axis of the sensor and the direction of gas flow 2.2.10. Engine speed sensor （optional） Engine speed sensor is mainly used to measure engine’s revolving speed. We can use it to compare with engine’s revolving speed of Camshaft signal sensor.
  • Page 29 Operation & Maintenance Manual for 12M26 Series Gas Engine Figure 2-14 Electronic throttle Installation requirements ●Electronic throttle shall be installed in low-temperature environment; ●Pay attention to arrow pointed airflow direction during installation. 2.2.12. Ignition coil This system adopts independent cylinder ignition coil, ECU controls coil’s charging hours, charging time and discharging hours and engine charge current shall be maintained at 6.5A under...

  • Page 30: Starter

    Operation & Maintenance Manual for 12M26 Series Gas Engine 2.2.14. Spark plug Sparking plug is used to receive high voltage generated by ignition coil, generate electric spark and ignite flammable gas. This engine uses double-platinum sparking plug. Installation requirements ●Installation torque of sparking plug: 25 N·m～28 N·m;...

  • Page 31: Communication Interface Of Gas Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine Fig. 2-19 Starter circuit In order to ensure trouble-free starter operation, attention should be paid to the followings: ● The starter should be protected from splash water, road mud and oil, and should be equipped with guard plate when necessary;...
  • Page 32 Operation & Maintenance Manual for 12M26 Series Gas Engine RUN/STOP switch：This switch can controlled the engine’s run or stop, if the switch was on，the engine run，contrarily ，the engine stopped. IDLE /RATED switch： The switch is off， the speed reduced to idle speed of 700rpm； if the switch is on，the speed increase to rated speed.
  • Page 33 Operation & Maintenance Manual for 12M26 Series Gas Engine SPEED BIAS ：If the switch is on，the voltage signal of control panel was transferred to Speed Bias interface. RAISE SPEED AND LOWER SPEED: This switch can be connect or reserved，the engine’s speed can be controlled by manual.
  • Page 34 Operation & Maintenance Manual for 12M26 Series Gas Engine...

  • Page 35: Chapter 3 Installation And Use Of The Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine Chapter 3 Installation and use of the engine 3.1 Engine unpacking After opening the engine box, please first check the engine and its accessories according to the delivery list, and check the engine appearance for damage and loose connections before carrying out the following tasks: ◆...

  • Page 36: Installation Of The Natural Gas Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine Fig 3-1 Engine Lifting 3.3 Installation of the natural gas engine 3.3.1 Engine installation (1) The engine and chassis must be connected with a flexible shock absorber. (2) Use flexible connection and ensure that the crankshaft centerline concentric with the input shat of the transmission (gear box, transmission box) so that the crankshaft is not affected by the additional force originated from the installation.

  • Page 37: Preparations Before Starting The Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine capacity. 4.The natural gas system design shall minimize the number of connection points on the high-pressure pipeline and guarantee the convenient construction, good sealing, easy-to-check and high reliability of connection points on the pipeline.

  • Page 38: Engine Starting

    Operation & Maintenance Manual for 12M26 Series Gas Engine 5.Check electronic system The system uses 24V DC power supply. The current from the battery enters the system and the engine control module (ECU) in two ways: in one way, it enters the system via the ignition key switch, serving as the main power source of the system;...

  • Page 39: Engine Shut-Down

    Operation & Maintenance Manual for 12M26 Series Gas Engine Lubricating oil: choose different grades of lubricating oil according to different ambient temperatures. Coolant: Coolant must be added to the cooling system. Choose the coolant of different freezing points according to different ambient temperatures.

  • Page 40: Environmental Conditions

    Operation & Maintenance Manual for 12M26 Series Gas Engine Emergency Standby Power (ESP) The maximum power amidst a certain variable engine power series with yearly operation time reached 200h. 3.8.1 Operation conditions and applications of the Power Operation conditions and applications of the natural gas engine at different powers are shown in Table 3-1.

  • Page 41: Chapter 4 12M26 Series Gas Generators Maintenance

    Operation & Maintenance Manual for 12M26 Series Gas Engine Chapter 4 12M26 Series Gas Generators Maintenance 4.1 Fuel, Lubricating Oil ,Coolant and Auxiliary materials 4.1.1 Fuel NG: Pipeline natural gas with a heating value of 36MJ/m³ (or above.)，CH4＞80%. Gas quality requirements(measure within 1 meter of engine gas inlet) Into the engine intake pressure is （3~5）kPa(after the pressure regulator),customers can choose...
  • Page 42 2) Do not check the oil level while the gas engine is running. 3) The oil with different quality grade cannot be used by mixing. The oil filling volume and the number of filters of 12M26 series Gas Generators is shown in Table 4-2...
  • Page 43 Operation & Maintenance Manual for 12M26 Series Gas Engine Table 4-4 Application of sealant for Gas Generators Grade Major application Application part Supplements Camshaft thrust plate bolt Camshaft timing gear bolt Middle idler bolt Front cover bolt Weichai Applied onto the threads to...

  • Page 44: Routine Maintenance Of The Gas Generator

    Operation & Maintenance Manual for 12M26 Series Gas Engine Table 4-5 Auxiliary materials Name Color Function and application Molykote Pulver (fine molybdenum Black Applied on flat and smooth metal surfaces to prevent seizing powder) Molykote G-N plus Achieve lubrication function before lubricating oil pressure is built...
  • Page 45 Operation & Maintenance Manual for 12M26 Series Gas Engine flow back to the oil pan. Figure 4-2 Checking of oil level ◆Check gas Check for gas pressure and leakages. ◆Check for leakages Check the external surface of gas generators for water, air/gas and oil leakage.

  • Page 46: Regular Maintenance Of The Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine Figure 4-4 Check the belt tension ◆Check the running sound of the gas generator ◆Check the speed and vibration of gas generator 4.3 Regular maintenance of the engine ◆ Replace the engine oil （1）Unscrew the drain plug at the bottom of oil pan, drain off the oil completely, discharge the...
  • Page 47 Operation & Maintenance Manual for 12M26 Series Gas Engine （4）After the sealing gasket touches the filter seat, tighten 3/4 to 1 more turns to seal tight; （5）Start the engine to check for oil leakage. Figure 4-6.Oil filter ◆ Check and adjust intake/exhaust valve clearance（seen in appendix 1.3）...
  • Page 48 Operation & Maintenance Manual for 12M26 Series Gas Engine of oil, water filter cleaning. Notice: (1) Safety filter is forbidden to dismantle and clean. (2) Forbidden to purge the outer filter from the outside to the inside .If there is more dust on the outer surface of the filter, the dust may fall off by hand.

  • Page 49: Notice For Using The New Gas Generator

    Operation & Maintenance Manual for 12M26 Series Gas Engine Note: It is not permissible to use the engine without an air filter as the entry of dust and impurities into the engine can lead to early wear of the engine.

  • Page 50: Gas Generator For Long-Term Storage Of Maintenance

    Operation & Maintenance Manual for 12M26 Series Gas Engine Table4-7 （continued） First Routine Maintenance items mainte inspection nance ▲ ▲ Clean the intercooler core Clean the fan and water tank ▲ ▲ clean up the mixer and ▲ electronic throttle valve Check the high-voltage line and ▲...

  • Page 51: Operation And Maintenance Specifications For Main Accessories Of Gas Engines

    Operation & Maintenance Manual for 12M26 Series Gas Engine 4.5.2 Protection during storage Use cap or plastic cloth to seal each oil, gas and water inlet and outlet; use VCI film to cover the whole engine. Note: Outer packing is needed for transportation.
  • Page 52 Operation & Maintenance Manual for 12M26 Series Gas Engine possible to meet the operational requirements of the thermal state, to avoid low temperature wear and prolong the service life of the engine. If you find the water pump leaks, you need to replace the pump seal.
  • Page 53 Operation & Maintenance Manual for 12M26 Series Gas Engine generator manufacturer or supplier (the distance from heat source: ≥400mm; or an effective thermal baffle is mounted). （5） The wire shall be sized reasonably and connected correctly and securely. Each connection terminal of generator should not be connected in a wrong way to avoid wires burnt-out or generator electrical parts damage.
  • Page 54 Operation & Maintenance Manual for 12M26 Series Gas Engine work of all components. Pressure limiting valve both bypass valve role, when the oil pump oil pressure exceeds the predetermined value, the pressure limiting valve call, part of the oil flow to the oil pan, thereby reducing the oil pressure.
  • Page 55 Operation & Maintenance Manual for 12M26 Series Gas Engine pass through the filter element, in order to confirm whether there is crack, pierced hole or other damages. Cleaning the main filter element with oil or water is strictly prohibited. （8） The main filter element shall be replaced after having working for 1000 to 2000 hours. In the meantime, the safety filter element shall be replaced.

  • Page 56: Chapter 5 Analysis And Removal Of Common Faults

    Operation & Maintenance Manual for 12M26 Series Gas Engine Chapter 5 Analysis and Removal of Common Faults 12M26 Series natural gas engines are designed and manufactured in compliance with a strict quality assurance system. Each engine leaving our factory is tested as specified. In addition, natural gas engine is a kind of precision machinery.
  • Page 57 Operation & Maintenance Manual for 12M26 Series Gas Engine Table 5-1 Engine faults and analysis Common Faults Possible Causes Fault Inspection and Treatment 1. The natural gas bottle is empty or the hand valve on gas bottle is not opened.
  • Page 58 Operation & Maintenance Manual for 12M26 Series Gas Engine Table 5-1(continued) Common Faults Possible Causes Fault Inspection and Treatment 2. The natural gas supplied is overthick or Check the oxygen sensor and gas overthin (the pressure reducer works metering valve.

  • Page 59: Appendix 1 Recommended Torque For Main Bearing Bolts Of 12M26 Series

    Operation & Maintenance Manual for 12M26 Series Gas Engine Appendix 1 Recommended Torque for Main bearing Bolts of 12M26 Series 1.1 Main bearing bolt and main bearing cover auxiliary bolt: a）Before assembling the main bearing bolts and auxiliary bolts, apply lubricating oil to the threads and carrying surfaces.
  • Page 60 Operation & Maintenance Manual for 12M26 Series Gas Engine Step 1: Tighten the M16 main bolts to 80N.m and tighten the M20 auxiliary bolts to 80N.m. Step 2: Tighten the M16 main bolts to 60° and tighten the M20 auxiliary bolts to 60°.

  • Page 61: Gas Engine

    Operation & Maintenance Manual for 12M26 Series Gas Engine Friction 0.125 (zinc plated) 0.14 (polished) coefficient Strength 10.9 12.9 10.9 12.9 grade Recommended torque (N·m) Bolt size 13.0 16.0 14.0 1100 1000 1200 1400 1650 1050 1500 1800 1350 1850...
  • Page 62 Operation & Maintenance Manual for 12M26 Series Gas Engine b）Turn the engine for 270º clockwise（face to flywheel），the piston of A1 is at the top dead center. Adjust the intake valve clearance of A1、 A2、 A4 and the exhaust valve clearance of A1、...
  • Page 63 Operation & Maintenance Manual for 12M26 Series Gas Engine Appendix 4 Q/WCQTG0007 “Specification of Spark Plug Removal and Refitting of Weichai Natural Gas Engine” I. Scope This specification stipulates the technical requirements regarding spark plug removal and refitting of Weichai series engines such as WP5NG, WP6NG, WP7NG, WP10NG, WP12NG, WP13NG,12M26NG and ect.
  • Page 64 Operation & Maintenance Manual for 12M26 Series Gas Engine Please remove high-voltage coil as shown And then use an air nozzle or high-pressure air to purge water, stain or dust inside spark plug sleeve. 2. Removal of spark plug When removing the spark plug make sure the stem of spark plug wrench is perpendicular to cylinder head surface.If it is hard to remove spark plug, please using instrument to increase the...
  • Page 65 Operation & Maintenance Manual for 12M26 Series Gas Engine bushing to prevent the spark plug bushing from turning and moving. If the spark plug bushing has occurred when removing spark plug bushing, the spark plug must be reset and rotate back to the initial state, and the ignition coil bushing clamp to verify whether meet the installation torque (25~28Nm), complex tightly solid bolt after dismantled if did not meet the...
  • Page 66 Operation & Maintenance Manual for 12M26 Series Gas Engine 5. Keep the cylinder head spark plug mounting hole dry and clean Use a clean cloth to remove the oil/water stains and other dirt in the cylinder head spark plug mounting hole.
  • Page 67 Operation & Maintenance Manual for 12M26 Series Gas Engine Here to be parallel 7.Refitting of spark plug After cleaning, pinch the spark plug thread, insert the spark plug wrench or high voltage coil, and then install it with the spark plug wrench.
  • Page 68 Operation & Maintenance Manual for 12M26 Series Gas Engine Insert the spark plug as shown here ATTENTION: Do not touch the spark plug ceramic body to prevent the production of flying arcs! The flying arcs produced Tighten the spark plug: the spark plug installation torque: 25-28 Nm. When installing with a torque-free wrench, rotate the wrench for 90 degrees after the new spark plug thread is screwed to the end;...
  • Page 69 Operation & Maintenance Manual for 12M26 Series Gas Engine Appendix 3 Correction Coefficient Of Power of Engine The power of the gas engine decrease very little under the altitude of 1000 meters. It is not necessary to adjust. When the engine work at the altitude above 2000 meters， the power of the engine or generator will decrease sharply because of the loss of air intake and the speed limit of the turbocharger .
  • Page 70 Operation & Maintenance Manual for 12M26 Series Gas Engine Contact Us Company name: Weichai Power Co.,Ltd Address: 197 A, Fushou East Street, High-Tech Development Zone, Weifang, Shandong, China Postcode: 261000 Website: http://www.weichai.com Engine sales: 0536-8232488 8233371 Accessories sales: 0536-2297290 Service Hotline: 400 Free Service Hotline: 400-6183066 800 Free Service Hotline: 800-8603066（Only use fixed phone）...

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