Table of Contents
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Printed in Japan
99080-20120
Pub.No.
OPERATION &
MAINTENANCE MANUAL
The operator and supervisor are requested to read this
Operation and Maintenance Manual carefully before
operating the engine or conducting inspection and
maintenance.
Never operate the engine or conduct maintenance work
without completely understanding this manual.
NOTE
October 2003
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Table of Contents
Troubleshooting
Related Manuals for Mitsubishi S12U
Summary of Contents for Mitsubishi S12U
- Page 1 OPERATION & MAINTENANCE MANUAL NOTE The operator and supervisor are requested to read this Operation and Maintenance Manual carefully before operating the engine or conducting inspection and maintenance. Never operate the engine or conduct maintenance work without completely understanding this manual. October 2003 99080-20120 Printed in Japan...
- Page 3 INTRODUCTION This manual contains information for operation, inspection and maintenance of the Mitsubishi Engines. Please read this manual carefully to understand the operation, inspection and maintenance procedures in order to use the engine properly. Failure to follow directions in this manual can lead to serious accidents.
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Page 4: Limited Warranty
INTRODUCTION Limited Warranty The manufacturer, at its option, will repair or replace any parts returned intact to the manufacturer only when the manufacturer, upon inspection, determines to be defective in material and/or workmanship. The foregoing shall constitute the limited warranty provided by the manufacturer. The manufacturer will provide the limited warranty only to the user with whom the manufacturer concludes the original contract, and shall not provide the limited warranty to a user to whom the ownership of the product may be transferred. -
Page 5: Important Information
• If this manual is misplaced, obtain a new copy Since there are many actions that cannot be per- from a Mitsubishi dealer as soon as possible. formed or must not be performed, it is not possi- ble to indicate every caution in this manual or on warning labels. - Page 6 INTRODUCTION Warnings The following two methods are used to call the attention of the operators and maintenance personnel to the potential danger of the engine. • Warning statements in the manual • Warning labels affixed on the engine Warning Statements The warning statements in this manual describe potential danger in operating, inspecting or maintaining the engine by using the following five classifications to indicate the degree of potential hazard.
- Page 7 INTRODUCTION Explanation of Terms Abbreviations, Standards and Others • API = American Petroleum Institute • ASTM = American Society for Testing and Materials • JIS = Japanese Industrial Standards • MIL = Military Specifications and Standards (U.S.) • MSDS = Material Safety Data Sheet •...
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Page 9: Table Of Contents
CONTENTS Chapter 1 Engine Oil and LLC......1-4 BASIC SAFETY PRECAUTIONS Use only specified fuel, engine oil and coolant (LLC).............. 1-4 Warning Fire and Explosion ....1-1 Keep flames away..........1-1 Handle LLC carefully ........1-4 Keep engine and surrounding area clean ..1-1 Properly dispose of drained oil and LLC .. - Page 10 Chapter 2 NAME OF PARTS Checking Battery..........3-6 Engine External Diagrams....2-1 Electrolyte level............3-6 S12U Left View ..........2-1 Checking specific gravity of electrolyte......3-6 S12U Right View ..........2-1 Checking loosened wire ........3-6 S16U Left View ..........2-2 Checking Valves for Open/Closed Position..3-7 S16U Right View ..........
- Page 11 Changing Engine Oil, Oil Filters and Bypass Oil Chapter 5 Filter ..............6-7 PERIODIC MAINTENANCE CHART Draining Engine Oil............6-7 How to Use Periodic Maintenance Changing Oil Filters (S12U)........6-7 Changing Oil Filters (Swithover Type) Chart............5-1 Periodic Maintenance Chart......5-1 (S12U) .............. 6-8 Periodic maintenance chart for regular-use Changing Oil Filters with Engine Stop .......6-8...
- Page 12 Caution for referring to manual ....1-9 Chapter 8 fig.1-10 Caution for burns .........1-9 TRANSPORTATION fig.2-1 S12U engine left view ........2-1 Lifting Engine Carefully ........8-1 fig.2-2 S12U engine right view ........2-1 fig.2-3 S16U engine left view ........2-2 fig.2-4 S16U engine right view ........2-2 fig.2-5 Start switch and stop switch......2-3...
- Page 13 Bleeding air from fuel filters looseness .............6-6 (cartridge-type)..........3-3 fig.6-11 Changing oil filter element (S12U) ....6-7 fig.3-5 Fuel filter switchover cock ......3-3 fig.6-12 Inspection of oil filter ........6-7 fig.3-6 Bleeding air from fuel feed pipe (1) ..... 3-3 fig.6-13 Changing oil filters (switchover type)..
- Page 14 CONTENTS List of Tables Table 3-1 Specific gravity of electrolyte ....3-6 Table 3-2 Data for rated speed......3-13 Table 4-1 Recomended Fuel ........4-2 Table 4-2 Fuel Use Limit Property Guideline ..4-3 Table 4-3 Water quality standards......4-6 Table 4-4 Recommended brands of LLC....
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Page 15: Warning Fire And Explosion
Chapter 1 BASIC SAFETY PRECAUTIONS Warning Fire and Explosion Keep flames away Check for fuel, oil and exhaust gas leaks Store fuel and engine oil in a well-ventilated area. Inspect fuel, oil and exhaust pipes regularly for Make sure that the caps of fuel damage and looseness. -
Page 16: Inspection And Maintenance
Chapter 1 BASIC SAFETY PRECAUTIONS Warning Stay Clear of All Rotating and Moving Parts Install protective covers on rotat- Lock out and Tag out ing parts Be sure to lock out and tag out before starting inspection and maintenance. Make sure the protective covers of Lockout and tagout are effective methods of cutting the engine are correctly installed. -
Page 17: Warning Be Careful Of Burns
Chapter 1 BASIC SAFETY PRECAUTIONS Warning Be Careful of Warning Be Careful of Burns Exhaust Fume Poisoning Do not touch engine during oper- Perform engine operation in a ation or immediately after opera- well-ventilated site tion Exhaust gas from the engine contains carbon monoxide and Do not touch the main and exhaust other harmful substances. -
Page 18: Lifting Engine Carefully
Use a stable work platform to Drained LLC is harmful. Do not dispose of into con- stand on when working on the ventional sewage. Contact a Mitsubishi dealer for upper part of the engine and the disposal of drained LLC. -
Page 19: Handle Battery Carefully
Chapter 1 BASIC SAFETY PRECAUTIONS Caution Service Bat- Caution When Abnor- tery mality Occurs Handle battery carefully If engine overheats, conduct cool- ing operation before stopping • Batteries release flammable engine hydrogen gas and oxygen. Never use flames or generate If the engine overheats, do not stop the engine sparks near the battery since immediately. -
Page 20: Stopping Engine
Warm-up operation circulates lubricants in the If there is a need to modify the engine, please con- engine and contributes to a longer service life and tact a Mitsubishi dealer. economical operation. Do not conduct warm-up operation for an extended Never break seals period of time. -
Page 21: Cleaner
Chapter 1 BASIC SAFETY PRECAUTIONS Conduct proper maintenance of Use appropriate tools for mainte- air cleaner/pre-cleaner nance work The major cause of abnormal wear on engine parts Use appropriate tools according to the type of is dust entering with intake air. Worn parts result in maintenance work, and use them correctly. -
Page 22: Caution About Warning Labels
If warning labels are damaged or missing, replace with new labels. If a part of the engine with warning label is replaced with new part, also attach new warning label to the new part. To obtain replacement warning labels, contact a Mitsubishi dealer. -
Page 23: Fig.1-3 Warning For Oil Mist
Chapter 1 BASIC SAFETY PRECAUTIONS Warning labels fig.1-1 Warning for flywheel fig.1-2 Warning for moving parts fig.1-3 Warning for oil mist entanglement fig.1-4 Caution for footing fig.1-5 Caution for electric shock fig.1-6 Warning for rotating parts fig.1-7 Caution for burns fig.1-8 Warning for rotating parts fig.1-9 Caution for referring to manual fig.1-10 Caution for burns... -
Page 25: Name Of Parts Engine External Diagrams
Chapter 2 NAME OF PARTS Engine External Diagrams The external diagram is for standard type of S12U/S16U engine. The installed equipment and shapes differ on the engine type. S12U Left View Turbocharger Silencer, pre-cleaner Pipe cover Air cooler Cylinder head... -
Page 26: S16U Left View
Chapter 2 NAME OF PARTS S16U Left View Fuel injection pipe Turbocharger Fuel injection pump Pipe cover Cylinder head Silencer Fuel filter Pre-cleaner (center-bolt type) Coolant drain cock Air starter main pipe Governor Damper cover Rear Front Governor oil filter Damper Breather Fuel feed pump... -
Page 27: Equipment And Instrument
Chapter 2 NAME OF PARTS Equipment and Instrument Starting and Shutdown Devices The shape and type of the starting and shutdown devices may vary from those described below depending on the engine specifications. Start Switch TART When the start switch on the operation panel is pressed, starting air is supplied to the air starter system and cranks the engine. -
Page 28: Instruments
Chapter 2 NAME OF PARTS Instruments Oil Cooler Coolant Pressure Gage The instruments indicate the internal conditions of the engine in operation. In normal operation, record This indicates the coolant pressure in the oil cooler. the numerical values indicated on the instruments at regular intervals. -
Page 29: Engine Protection Devices
If the cause of the problem is unknown, contact a Mitsubishi dealer. Protection devices installed on the engine and their types (setting values) and shapes vary depending on the engine specifications. The following describes the typical protection devices installed in a Mitsubishi engine. Low Oil Pressure Alarm The oil pressure switch activates an alarm when the engine oil pressure drops to an abnormally low level. -
Page 30: Using Turning Gear
Chapter 2 NAME OF PARTS Using Turning Gear Before starting the engine, return (pull out) the turning gear to the original position. Starting the engine with the turning gear pushed in not only damages the ring gear but also may result in personal injury. 1 Untighten the retaining bolt. -
Page 31: Operation
Chapter 3 OPERATION Preparation for Operation of New or Overhauled Engine Before operating a new or overhauled engine, do the following inspection. For second operation onward, do the following normal operation outlined on page 3-8 "Normal Engine Operation". Fuel System When handling fuel, make sure there are no flames near the engine. -
Page 32: Bleeding Fuel System
Chapter 3 OPERATION Bleeding Fuel System When fuel overflows from the air vent plug, wipe [Unlock] thoroughly with a cloth. Spilled fuel is a fire haz- Turn counterclockwise ard. After bleeding, lock the priming pump cap securely. If the cap is not locked tightly, the [Priming] priming pump can be damaged, causing fuel [Lock]... -
Page 33: Bleeding Air From Fuel Feed Pipe
Chapter 3 OPERATION Bleeding Air from Fuel Filters Right side air vent plug (Cartridge-Type) and sealing washer 1 Set the handle of the fuel filters (cartridge-type) Bracket to the "Left - Open, Right - Bleed position, and loosen the right-side air vent plug by rotating it Handle about 1.5 turns. -
Page 34: Lubricating System
Oil level gage Specified engine oil:Class CD or CF (API Service Classification) Engine oil capacity (oil pan) S12U: approx. 450 L [118.88 U. S. gal.] S16U: approx. 600 L [158.50 U. S. gal.] Note: Regarding engine oil, refer to "Engine Oil" (4- fig.3-8 Oil filler and oil level gage... -
Page 35: Cooling System
(4-6). Coolant capacity (engine only) fig.3-10 Coolant drain cock on the engine S12U: approx. 520 L [137.37 U. S. gal] S16U: approx. 700 L [184.92 U. S. gal] 3 Pour soft water with minimal impurities slowly to the full level. -
Page 36: Electrical Systems
Chapter 3 OPERATION Electrical Systems Checking Battery If electrolyte is spilled on the eyes, skin or clothes, wash immediately with plenty of water. If electrolyte enters the eyes, flush immediately with lots of fresh water and see a physician. Do not use flames near the battery. When handling the battery, be careful of sparks generated by accidental shorting. -
Page 37: Checking Valves For Open/Closed Position
Chapter 3 OPERATION Checking Valves for Open/Closed Position Make sure the following valves, plugs and cocks are open or closed properly. • Fuel feed valve: Open • Coolant drain cock (coolant tank): Closed • Coolant drain cock (engine): Closed • Coolant drain cock (water pump): Closed •... -
Page 38: Normal Engine Operation
Check the engine exterior carefully. If an abnor- mality is found, be sure to repair or contact a Mitsubishi dealer. Before starting the engine, clean the top surface of the battery with wet cloth. -
Page 39: Checking Fuel Level In Tank
Chapter 3 OPERATION Checking Fuel Level in Tank When handling fuel, make sure there are no flames near the engine. Wipe any spilled fuel completely. Spilled fuel can ignite and cause fire. Do not remove the strainer when filling the fuel tank. Use fuel specified in "Fuel"... -
Page 40: Checking Coolant Level
Chapter 3 OPERATION Checking Coolant Level Water supply inlet Never check the coolant level while the engine Fluid level gage is in operation or immediately after it is stopped but wait until the coolant temperature drops sufficiently. If not, hot water blow out, causing skin burns as a result. -
Page 41: Draining Water From Air Starter Tank
Chapter 3 OPERATION Draining Water from Air Starter Tank Starting air handles Slowly open the starting air handle of the air tank. If the handle is opened quickly, the engine can start abruptly and cause an unexpected accident. 1 Close the starting air handle of the air tank. 2 Open the drain valve handle located under the Drain valve handle... -
Page 42: Starting
Note: If the engine fails to start after three attempts, Oil pressure standard value during warming-up: contact a Mitsubishi dealer. 0.20 to 0.39 MPa (2.0 to 4.0 kgf/cm ) [29 to 56.56 psi] (at low idling) -
Page 43: Operation
If the above inspection finds an abnormality, stop the engine immediately, correct all problems, and restart the engine. If the engine cannot be repaired, contact a Mitsubishi dealer. 3-13... -
Page 44: Stopping
Inspection After Stopping Inspect the engine parts to make sure there is no fuel, oil or coolant leakage. If a fuel or oil leak is found, repair the leakage or contact a Mitsubishi dealer. 3-14... -
Page 45: Maintenance
LLC is a potent alkaline solution. Do not drink or Use only genuine Mitsubishi parts. allow it to enter your eyes. When replacing new parts, use only genuine Mit- subishi parts. To obtain new parts, contact a Mitsubishi dealer. -
Page 46: Fuel
Use commercially available diesel fuel (JIS K2204). Note: Some Class-A heavy oils are unsuitable for Diesel fuel use in the Mitsubishi diesel engine. Use fuel that meets the Use Limit Property Guideline Compliance for Diesel Fuel. If the engine is continuously... -
Page 47: Table 4-2 Fuel Use Limit Property Guideline
Chapter 4 MAINTENANCE Table 4-2 Fuel Use Limit Property Guideline Property Recommend use limit Current use limit Remarks JIS K2204, 2205 Diesel fuel: 50 ° C or higher Flash point As stipulated by regulation Class-A heavy oil: 60 °C [140 °F] or higher First distillation 170 °C [338 °F] or... -
Page 48: Engine Oil
Chapter 4 MAINTENANCE Engine Oil Recommended Engine Oil Use class CD (recommended) and CF engine oils. Class CE and CF-4 engine oils are designed for diesel fuel with a sulfur content of less than 0.5% and less than 0.2%, respectively. Since the sulfur content of most Class-A heavy oil exceeds 0.5%, do not use Class CE or CF-4 engine oil when using Class-A heavy oil as fuel. -
Page 49: Handling Engine Oil
Chapter 4 MAINTENANCE Handling Engine Oil Before pouring engine oil into the engine, stop the engine and make sure there are no flames near the engine. Oil leaked or spilled onto hot surfaces or electrical components can cause a fire. Wipe any spilled oil immedi- ately and thoroughly. -
Page 50: Coolant
Chapter 4 MAINTENANCE Coolant Recommended Coolant Water used in the engine cooling system must be soft water. The water quality must meet the following requirements. Water quality should meet with recommended limit, however, within limit is acceptable. Table 4-3 Water quality standards Main adverse effect Chemical Item... -
Page 51: Recommended Llc
Table 4-4 Recommended brands of LLC age. Manufacturer Brand For disposal of used coolant, consult a Mitsubishi Nippon Oil Corporation Super Coolant X dealer. Mitsubishi Fuso Truck & Fuso Diesel Long Life... -
Page 52: Importance Of Llc
Chapter 4 MAINTENANCE Importance of LLC Examples of Abnormalities Caused by LLC Today's trend is toward smaller and more light- weight engines offering greater output, lower fuel consumption and lower exhaust emission level. Pitting on iron parts Conditions to which engine coolant is subjected are Amines are generally effective in suppressing the becoming severer due to longer operating hours, rusting of ferrous metals, but they are said to cause... -
Page 53: Filters
When replacing filters, use genuine Mitsubishi parts. Do not wash and reuse cartridge-type filters. Always use new filters. -
Page 54: Cautions In Operating Engine In Cold Weather Season
Chapter 4 MAINTENANCE Cautions in Operating Engine in Cold Weather Season When the ambient temperature is low, fuel and Battery engine oil become thick and coolant can freeze, thus making it difficult to start the engine or causing damage to the cylinder heads. To prevent these Never use flames near the battery, and be care- problems, observe the following directions. -
Page 55: Periodic Maintenance Chart How To Use Periodic Maintenance Chart
(When operating the engine for the adjustment of determine the most appropriate service inter- peripheral devices, limit the operating time to 10 vals. (Feel free to consult a Mitsubishi dealer minutes.) regarding service intervals.) Once every month: Operate the engine under load (for 15 to 30 minutes with more than 1/2 load). -
Page 56: General Definition Of Regular-Use Engine, Emergency Engine And General-Purpose Engine
Chapter 5 PERIODIC MAINTENANCE CHART General Definition of Regular-Use Engine, Emergency Engine and General-Purpose Engine General definition of regular-use engine An engine operated with a constant base load for the purpose of generating electric power, which is used independently or in combination with commer- cial power supply. -
Page 57: Periodic Maintenance Chart For Engine In Regular Use
Chapter 5 PERIODIC MAINTENANCE CHART Periodic Maintenance Chart for Engine in Regular Use Table 5-1 Periodic maintenance chart for engine in regular use (1 / 5) Service Service item Service contents Page interval Every day Inspect leakage and looseness of bolts and nuts. External Retighten bolts and nuts. - Page 58 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-1 Periodic maintenance chart for engine in regular use (2 / 5) Service Service item Service contents Page interval Every 3000 Inspect and adjust (also inspect inside of rocker Valve clearance service chamber). hours Fuel injection nozzles Change nozzle tipes and adjust pressure.
- Page 59 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-1 Periodic maintenance chart for engine in regular use (3 / 5) Service Service item Service contents Page interval Every 12000 Overhaul of top end of engine (remove the cylinder heads for inspection and main- service tenance.) hours...
- Page 60 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-1 Periodic maintenance chart for engine in regular use (4 / 5) Service Service item Service contents Page interval Every 12000 Fuel control Change ball joints and ball bearings. service linkage hours Fuel injection Disassembe and maintain, and change deflec- pump tors and O-rings.
- Page 61 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-1 Periodic maintenance chart for engine in regular use (5 / 5) Service Service item Service contents Page interval Every 24000 Major overhaul (complete disassembly and inspection) service Change all O-rings, gaskets and seals. hours Change inlet and exhaust valves, valve seats, valve guides, valve Cylinder...
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Page 62: Periodic Maintenance Chart For Emergency Engine
Chapter 5 PERIODIC MAINTENANCE CHART Periodic Maintenance Chart for Emergency Engine Table 5-2 Periodic maintenance chart for emergency engine (1 / 5) Service Service item Service contents Page interval Every week Operate the engine under no load for 3 to 5 minutes. - Page 63 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-2 Periodic maintenance chart for emergency engine (2 / 5) Service Service item Service contents Page interval After 1 year or 500 ser- Analyze engine oil properties. vice hours, Engine oil 6-12 (according to engine oil analysis service) whichever comes first Every year...
- Page 64 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-2 Periodic maintenance chart for emergency engine (3 / 5) Service Service item Service contents Page interval Every 2 Inspection of shaft for smooth rotation and Turbocharger years and wheel thrust for looseness. Fuel system accumulator Refill with nitrogen gas.
- Page 65 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-2 Periodic maintenance chart for emergency engine (4 / 5) Service Service item Service contents Page interval Every 4 Fuel injection Change nozzle tips and adjust pressure. years nozzles Fuel system Disassemble, maintain, adjust and change Fuel injection pump O-rings.
- Page 66 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-2 Periodic maintenance chart for emergency engine (5 / 5) Service Service item Service contents Page interval Every 8 Fuel regulator valve Inspect. years Fuel pipes Change O-rings and sealing washers. Fuel control linkage Change ball joints and ball bearings.
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Page 67: Periodic Maintenance Chart For General-Purpose Power Supply Engine
Chapter 5 PERIODIC MAINTENANCE CHART Periodic Maintenance Chart for General-Purpose Power Supply Engine Table 5-3 Periodic maintenance chart for general-purpose power supply engine (1 / 5) Service Service item Service contents Page interval Every day Inspect leakage and looseness of bolts and nuts. External Retighten bolts and nuts. - Page 68 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-3 Periodic maintenance chart for general-purpose power supply engine (2 / 5) Service Service item Service contents Page interval Every 3000 Inspect and adjust (also inspect inside of rocker Valve clearance service chamber). hours Inspect and change nozzle tipes and adjust pres- Fuel injection nozzles sure.
- Page 69 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-3 Periodic maintenance chart for general-purpose power supply engine (3 / 5) Service Service item Service contents Page interval After 12000 Overhaul of top end of engine (remove the cylinder heads for inspection and main- service tenance.) hours or 8...
- Page 70 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-3 Periodic maintenance chart for general-purpose power supply engine (4 / 5) Service Service item Service contents Page interval After 12000 Fuel control Change ball joints and ball bearings. service linkage hours or 8 Fuel injection Disassemble and maintain, and change deflec- years,...
- Page 71 Chapter 5 PERIODIC MAINTENANCE CHART Table 5-3 Periodic maintenance chart for general-purpose power supply engine (5 / 5) Service Service item Service contents Page interval Every 24000 Major overhaul (complete disassembly and inspection) service Change all O-rings, gaskets and seals. hours Change inlet and exhaust valves, valve seats, valve guides, valve Cylinder...
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Page 73: Periodic Inspection And Maintenance Procedures
Chapter 6 PERIODIC INSPECTION AND MAINTE- NANCE PROCEDURES Fuel System Draining Water from Fuel Filters (Wire-Element Type) Before handling fuel, make sure there is no flame or heat source in the area. Wipe spilled fuel thoroughly. Spilled fuel can cause a fire. Check for damage of threaded section of the filter case, the drain plug and the sealing washer, if any damage are found, replace with the new one. -
Page 74: Draining Water From Fuel Tank
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Draining Water from Fuel Tank When handling fuel, make sure there are no flames or heat source in the area. Wipe any spilled fuel completely. Spilled fuel can ignite and cause fire. Do not remove the strainer when filling the fuel tank. Use fuel specified in "Fuel"... -
Page 75: Changing Fuel Filters (Center-Bolt Type)
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Changing Fuel Filters (Center-Bolt Type) When handling fuel, make sure there are no flames or heat source in the area. Wipe any spilled fuel completely. Spilled fuel can ignite and cause fire. The fuel filter (center-bolt type) uses a paper element. It cannot be cleaned for reuse. When installing a new element, be careful not to damage the element. -
Page 76: Changing Fuel Filters (Cartridge Type)
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Changing Fuel Filters (Cartridge Type) When handling fuel, make sure there are no flames or heat source in the area. Wipe any spilled fuel completely. Spilled fuel can ignite and cause fire. This fuel filter (cartridge type) uses a paper element. It cannot be cleaned for reuse. The fuel filter cartridges must be installed by hand, and caution should be exercised to prevent denting or scratching the cartridge surfaces. -
Page 77: Changing Fuel Filters While Engine In Operation
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Changing Fuel Filters while Engine in Operation To replace the fuel filters while the engine is in operation, be sure to run the engine under no load low idling and at rated speed. If the fuel filter is replaced during the engine is in high-speed operation, fuel can leak from the switchover lever. -
Page 78: Inspection Of Fuel Control Linkage Ball
0.1 mm looseness. [0.004 in.] If the amount of looseness is more than 0.1 mm [0.004 in.], consult a Mitsubishi dealer to replace the ball joints. Lever Never break a seal of fuel control link to replace the fig.6-10 Inspection of the ball joints for looseness ball joints. -
Page 79: Lubricating System
Be sure to suck out the engine oil when draining. Engine oil capacity (oil pan) S12U: approx. 450 L [118.88 U. S. gal.] S16U: approx. 600 L [158.50 U. S. gal.] Changing Oil Filters (S12U) Inspect the damage of the drain plug and filter bracket threaded sections, the center bolt and the gasket, if any damage are found, replace it with the new one. -
Page 80: Changing Oil Filters (Swithover Type) (S12U)
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Changing Oil Filters (Swithover Type) (S12U) Inspect the damage of the drain plug and filter bracket threaded sections, the center bolt and the gasket, if any damage are found, replace it with the new one. -
Page 81: Changing Oil Filters (Swithover Type) (S16U)
If metal parti- cles are found on the elements, consult your Mitsubishi dealer. 6 By using a clean cloth, wipe off oil from the oil filter mounting surfaces and O-ring mounting surfaces of the filter bodies. -
Page 82: Changing Bypass Oil Filter
Changing bypass oil filters Note: Check the filter elements in the removed oil filter for metal particles. If metal particles are found, consult a Mitsubishi dealer. 4 Wipe oil from the oil filter mounting surface on the filter bracket with a cloth. -
Page 83: Pouring Engine Oil
Specified engine oil Class CD or CF (API Service Classification) Specified engine oil capacity (oil pan) S12U: approx. 450 L [118.88 U. S. gal] S16U: approx. 600 L [158.50 U. S. gal] Note: Regarding engine oil, refer to "Engine Oil"... -
Page 84: Analysis Of Engine Oil Properties
PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Analysis of Engine Oil Properties For many years of trouble-free engine operation, Mitsubishi offers engine oil analysis service. This service provides detailed information of your engine condition by analyzing a sample of engine oil collected from your engine with special oil sampling tools. -
Page 85: Cooling System
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Cooling System Checking LLC Concentration Check the LLC concentration in the coolant by using an optical hydrometer for battery fluid and antifreeze. Regarding LLC concentration, refer to "Coolant" (4-6). Inspection and Replacement of Zinc Rods Zinc rods (zinc electrodes) are installed at various sec- tions of the sea water passage to prevent corrosion caused by sea water. -
Page 86: Changing Coolant
Coolant (containing LLC) drained from an engine is toxic, and must not be disposed of into regular sewage. For disposal of used coolant, consult a Mitsubishi dealer. When a coolant mixed with the LLC recommended by our company is used, replace coolamt every 12000 hours or 2 years, whichever comes first, in a regular-use or general-purpose engine. -
Page 87: Pouring Coolant
(b) Regarding coolant, refer to "Coolant" (4-6). Coolant capacity (engine only) S12U: approx. 520 L [137.37 U. S. gal] S16U: approx. 700 L [184.92 U. S. gal] 3 Pour soft water with minimal impurities slowly to fig.6-25 Coolant drain cock on the engine the full level. -
Page 88: Inlet And Exhaust Systems
Check the exhaust pipes and muffler for damage and cracks. If they are damaged or cracked, con- tact a Mitsubishi dealer. Remove the drain plug and allow water to drain from the exhaust muffler. Be sure to reinstall the drain plug after draining water. -
Page 89: Cleaning, Inspecting And Changing Air Cleaner Element
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Cleaning, Inspecting and Chang- ing Air Cleaner Element Element Wing nut When handling compressed air, wear safety gog- gles, hardhat, gloves and other necessary protec- tive gear. Compressed air may cause personal injury when not wearing the proper protective gear. Do not service the air cleaner while the engine is running. -
Page 90: Air Starter System
Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES Air Starter System Draining Water and Cleaning Air Starter Strainer 1 Close the starter valve handle of the air starter Air starter Air starter tank. inlet outlet 2 Remove the drain plug of air starter strainer and drain water from the air strainer. -
Page 91: Long-Term Storage
Chapter 7 LONG-TERM STORAGE The following describes the method to store the (d) New engine oil may be used in place of engine in a non-operable condition for more than rust-preventive oil (NP-10-2). three months and the method for storing the engine Table 7-1 Recommended rust-preventive in an operable condition for more than three oil and corrosion inhibitor... -
Page 92: Storing Engine In Operable Condition For More Than 3 Months
Chapter 7 LONG-TERM STORAGE Storing Engine in Operable Con- dition for More Than 3 Months When the engine is not operated during storage of more than three months, internal engine parts can rust and lose oil film. As a result, the engine can seize when it is started after storage. -
Page 93: Transportation
Chapter 8 TRANSPORTATION Lifting Engine Carefully To lift the engine, use wire ropes, shackles and slings capable of supporting the weight of the engine. Attach slings to the hangers provided on the engine to lift the engine. Keep the engine balanced during lifting by considering the engine's center of gravity. -
Page 95: Troubleshooting General Precautions
Chapter 9 TROUBLESHOOTING General Precautions Contact a Mitsubishi Dealer for Notes Regarding Parts Handling Repair Service Handle parts carefully. When replacing parts, use only genuine parts by Repairing a malfunctioning engine may require referring to the parts catalog. special equipment or potentially dangerous work,... -
Page 96: Conditions Required For Proper Engine Operation
Chapter 9 TROUBLESHOOTING Conditions Required for Proper Engine Operation The following table shows the conditions required for proper engine operation, and the locations that affect those conditions. Table 9-1 Conditions required for proper engine operation Required condition Affecting locations Affected by cylinder liners, pistons, piston rings, Complete compression of air exhaust valves, inlet valves, and their related parts Appropriate quantity of fuel injected in proper spray... -
Page 97: Troubleshooting
Chapter 9 TROUBLESHOOTING Troubleshooting Engine Turns, But It Does Not Start Table 9-2 Engine turns, but it does not start (1 / 2) Problem Cause Remedy (1) No fuel supplied to fuel injection pump Bleed air from fuel filter and fuel feed pipes, and inspect each part for damage a Air trapped in fuel supply system and air leaks. - Page 98 Chapter 9 TROUBLESHOOTING Table 9-2 Engine turns, but it does not start (2 / 2) Problem Cause Remedy (1) Improper fuel injection timing Inspect camshaft drive section, and adjust a Malfunction of camshaft drive fuel injection timing correctly. b Deviation of fuel ignition timing due to worn fuel injection pump tappet roller or Replace if worn.
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Page 99: Engine Does Not Turn
Chapter 9 TROUBLESHOOTING Engine Does Not Turn Table 9-3 Engine does not turn Problem Cause Remedy Inspect starting valve, and repair or a Malfunction of starting valve replace. Malfunction of starting air sys- Check air tank pressure, and increase b Starting air pressure lower than specified tem. -
Page 100: Engine Output Is Low
Chapter 9 TROUBLESHOOTING Engine Output is Low Table 9-4 Engine output is low Problem Cause Remedy (1) Tendency of engine moving parts toward seizing Check abnormal heating of parts listed in a Tendency toward seizing due to insuffi- Table 9-3, and repair defective cient clearances of engine parts Engine emits parts. -
Page 101: Engine Knocks
Chapter 9 TROUBLESHOOTING Engine Knocks Table 9-5 Engine knocks Problem Cause Remedy Engine knocks slightly and emits Fuel injection timing too retarded Refer to C-(1) Table 9-2. black exhaust smoke. Fuel injection timing is too Knocking is severe, and exhaust Refer to C-(1) Table... -
Page 102: Engine Produces Large Amount Of Smoke While In Operation
Chapter 9 TROUBLESHOOTING Engine Produces Large Amount of Smoke While in Operation Table 9-6 Engine produces large amount of smoke while in operation Problem Cause Remedy (1) Severe knocking Fuel injection timing too Refer to C-(1) Table 9-2. advanced (2) Knocking produced only in cylinders with insufficient compression Low engine compression Refer to C-(3) -
Page 103: Malfunction Of Lubricating System
Chapter 9 TROUBLESHOOTING Malfunction of Lubricating System Table 9-8 Malfunction of lubrication system Problem Cause Remedy Check oil level gage, and add oil a Engine oil level too low if level is low. b Engine oil viscosity too high for smooth pumping of oil Change oil to one with appropri- (Especially when temperature... -
Page 105: Main Specifications
Chapter 10 MAIN SPECIFICATIONS Main Specifications Table 10-1 Main specifications table Engine model S12U S16U Type Water-cooled, 4-stroke cycle, turbocharged diesel, air cooler Number of cylinders, 12-V 16-V arrangement 240×260 [9.45×10.2] Bore×stroke (mm [in.]) Total displacement 141.1 [37.27] 188.2 [49.72] (L [U.