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PERIODIC MAINTENANCE

L-N Operation Manual

77

Perform the following maintenance every 2000
hours of operation.

• Check and Replace Fuel Hoses

Check and Replace Fuel Hoses

Regularly check the fuel system hoses. If they are
cracked or degraded, replace them. Replace the
hoses at least every two years, or 2000 hours,
whichever occurs first. Consult your authorized
Yanmar industrial engine dealer or distributor to
replace fuel system hoses.

Every 2000 Hours of Operation

CAUTION

Be environmentally responsible. Follow
these procedures for hazardous waste
disposal. Failure to follow these
procedures may seriously harm the
environment.

• Follow the guidelines of the

governmental agency for the proper
disposal of hazardous materials such
as engine oil, diesel fuel and engine
coolant. Consult the local authorities
or reclamation facility.

• NEVER dispose of hazardous

materials irresponsibly by dumping
them into a sewer, on the ground or
into ground water or waterways.

0000013en

LN Series OperationManual_A4.book 77 ページ２００６年５月１２日　金曜日　午前１０時１８分

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Summary of Contents for L100N

Page 1: ...L48N L70N L100N 0ALN0 G00100 PRINTED IN JAPAN ...

Page 2: ...cancer and reproductive harm Wash hands after handling Head Office Yanmar Co Ltd 1 32 Chayamachi Kita ku Osaka 530 8311 Japan http www yanmar co jp Yanmar America Corporation 951 Corporate Grove Drive Buffalo Grove IL 60089 4508 U S A TEL 1 847 541 1900 FAX 1 847 541 2161 http www yanmar com Yanmar Europe B V Brugplein11 1332 BS Almere de Vaart The Netherlands TEL 31 36 5493200 FAX 31 36 5493209 h...

Page 3: ...ollow safe operating practices and maintenance procedures Keep this Operation Manual in a convenient place for easy access If this Operation Manual is lost or damaged order a new one from your authorized Yanmar industrial engine dealer or distributor Make sure this manual is transferred to subsequent owners This manual should be considered a permanent part of the engine and remain with it Constant...

Page 4: ..._________________________ Engine Serial No __________________________________________________________________ Date Purchased ___________________________________________________________________ Dealer ____________________________________________________________________________ Dealer Phone ______________________________________________________________________ LN Series OperationManual_A4 book ii ペー...

Page 5: ... vii What the Engine Owner Must Do vii To Locate an Authorized Yanmar Industrial Engine Dealer or Distributor viii What Yanmar Will Do viii What is Not Covered by this Warranty viii Warranty Limitations ix Warranty Modifications ix Questions ix Retail Purchaser Registration ix Safety 1 Safety Statements 1 Safety Precautions 2 Before You Operate 2 During Operation and Maintenance 2 LN Series Operat...

Page 6: ...ecifications 24 Filling the Fuel Tank 25 Engine Oil 27 Engine Oil Specifications 27 Engine Oil Viscosity 28 Checking Engine Oil 28 Adding Engine Oil 28 Engine Oil Capacity Typical 29 Daily Checks 29 Visual Checks 29 Check Diesel Fuel and Engine Oil 30 Check Engine Speed Control First Time Only 30 Check Indicators 30 Engine Operation 31 Starting the Engine 37 Recoil Start 37 Electric Start 39 Check...

Page 7: ...ration 61 Daily After Operation 66 After Initial 50 Hours of Operation 68 Every 50 Hours of Operation 70 Every 200 Hours of Operation 71 Every 400 Hours of Operation 75 Every 1000 Hours of Operation 76 Every 1500 Hours of Operation 76 Every 2000 Hours of Operation 77 Troubleshooting 79 Troubleshooting Chart 79 Troubleshooting Information 81 Long Term Storage 83 Before You Place the Engine in Long ...

Page 8: ...TABLE OF CONTENTS vi L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book vi ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 9: ... whichever occurs first What the Engine Owner Must Do If you believe your Yanmar engine has experienced a failure due to a defect in material and or workmanship you must contact an authorized Yanmar industrial engine dealer or distributor within thirty 30 days of discovering the failure You must provide proof of ownership of the engine proof of the date of the engine purchase and delivery and docu...

Page 10: ...covered by this Warranty found to be defective in material and or workmanship Such repairs and or replacements will be made at a location designated by Yanmar at no cost to the purchaser for parts or labor What is Not Covered by this Warranty This Warranty does not cover parts affected by or damaged by any reason other than defective materials or workmanship including but not limited to accident m...

Page 11: ...ights which vary from state to state and country to country Limitations set forth in this paragraph shall not apply to the extent that they are prohibited by law Warranty Modifications Except as modified in writing and signed by the parties this Warranty is and shall remain the complete and exclusive agreement between the parties with respect to warranties superseding all prior agreements written ...

Page 12: ...YANMAR WARRANTIES x L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book x ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 13: ...lved Please read and abide by the message that follows the safety alert symbol A DANGER Danger the word DANGER is in white letters with a red rectangle behind it indicates an imminently hazardous situation which if not avoided will result in death or serious injury Danger is limited to the most extreme situations 0000001en A A WARNING Warning the word WARNING is in black letters with an orange rec...

Page 14: ... the battery is charging hydrogen gas is produced which can be easily ignited Keep sparks open flame and any other form of ignition away Failure to comply will result in death or serious injury 0000003en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions When you remove any fuel system component to perform maintenance such as changing the f...

Page 15: ...able and explosive under certain conditions NEVER remove the fuel cap with the engine running Failure to comply will result in death or serious injury 0000011en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions Only fill the fuel tank with diesel fuel Filling the fuel tank with gasoline may result in a fire NEVER refuel with the engine run...

Page 16: ...sel fuel is extremely flammable and explosive under certain conditions Before you operate the engine check for fuel leaks Replace rubberized fuel hoses every two years or every 2000 hours of engine operation whichever comes first even if the engine has been out of service Rubberized fuel lines tend to dry out and become brittle after two years or 2000 hours of engine operation whichever comes firs...

Page 17: ...g clothing and keep your hair short or tie it back while the engine is running Remove all jewelry before you operate or service the machine NEVER start the engine in gear Sudden movement of the engine and or machine could cause death or serious personal injury NEVER operate the engine without the guards in place Before you start the engine make sure that all bystanders are clear of the area Keep c...

Page 18: ...the engine while you are under the influence of alcohol or drugs NEVER operate the engine when you are feeling ill Failure to comply could result in death or serious injury 0000004en A WARNING EXPOSURE HAZARD Wear personal protective equipment such as gloves work shoes eye and hearing protection as required by the task at hand NEVER wear jewelry unbuttoned cuffs ties or loose fitting clothing when...

Page 19: ...authorized Yanmar industrial engine dealer or distributor repair the damage Failure to comply could result in death or serious injury 0000008en A WARNING SHOCK HAZARD Turn off the battery switch if equipped or disconnect the negative battery cable before servicing the electrical system Check the electrical harnesses for cracks abrasions and damaged or corroded connectors ALWAYS keep the connectors...

Page 20: ...JECT HAZARD ALWAYS wear eye protection when servicing the engine and when using compressed air or high pressure water Dust flying debris compressed air pressurized water or steam may injure your eyes Failure to comply may result in minor or moderate injury 0000003en CAUTION Only use diesel fuels recommended by Yanmar for the best engine performance to prevent engine damage Only use clean diesel fu...

Page 21: ...g engine operation stop the engine immediately Determine the cause and repair the problem before you continue to operate the engine 0000029en CAUTION Observe the following environmental operating conditions to maintain engine performance and avoid premature engine wear Avoid operating in extremely dusty conditions Avoid operating in the presence of chemical gases or fumes Avoid operating in a corr...

Page 22: ...e oil specified Other engine oils may affect warranty coverage cause internal engine components to seize or shorten engine life Prevent dirt and debris from contaminating the engine oil Carefully clean the oil cap dipstick and the surrounding area before you remove the cap NEVER mix different types of engine oil This may adversely affect the lubricating properties of the engine oil NEVER overfill ...

Page 23: ...eriod check the engine oil levels frequently 0000011en CAUTION NEVER engage the starter motor while the engine is running This may damage the starter motor pinion and or ring gear 0000012en CAUTION NEVER attempt to modify the engine s design or safety features such as defeating the engine speed limit control or the fuel injection quantity control Failure to comply may impair the engine s safety an...

Page 24: ...enance prevents unexpected downtime reduces the number of accidents due to poor machine performance and helps extend the life of the engine 0000060enLVOM CAUTION When the engine is operated in dusty conditions clean the air cleaner element more frequently NEVER operate the engine with the air cleaner or element s removed This may cause foreign material to enter the engine and damage it 0000026en C...

Page 25: ...gine applications the engine s flywheel housing or end plate is coupled directly to the driven machine In belt drive engine applications a belt drive is used to power the driven machine The engine is designed for a wide range of applications Options are available to customize the application Since designing the application and installing the engine require special knowledge and skill always consul...

Page 26: ...0N engines are represented in this manual 0001126A 3 4 5 6 8 9 10 1 11 7 7 6 12 13 2 Figure 1 1 Fuel Drain Plug 2 Decompression Lever 3 Air Cleaner 4 Recoil Starter Handle 5 Recoil Starter 6 Oil Cap Dipstick 7 Oil Drain Plug 8 Engine Speed Control Lever 9 Fuel Injection Pump 10 Fuel Cock 11 Fuel Tank 12 PTO Shaft 13 Oil Filter LN Series OperationManual_A4 book 14 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 27: ... 2 shows the location of regulatory and safety labels on Yanmar L N Series engines Figure 2 Typical location of the engine nameplate is shown Figure 2 1 Engine Nameplate Typical 0001126C 01 1 0001585 02 LN Series OperationManual_A4 book 15 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 28: ...iller port Since it uses a mesh construction it can be cleaned The outlet fuel filter is a replaceable cartridge that is located at the outlet of the fuel tank Periodic cleaning replacement is required See Periodic Maintenance Schedule on page 59 Fuel Tank The fuel tank is a reservoir that holds diesel fuel When fuel leaves the fuel tank it goes to the fuel injection pump Since fuel is used to kee...

Page 29: ... the engine by reducing the effort needed to pull the recoil starter handle The decompression lever will automatically return to the original position when the engine starts Some L N model engines have an automatic internal compression release mechanism and do not have the external compression release lever Refer to the specific instructions for your driven machine Figure 4 INDICATORS AND CONTROLS...

Page 30: ...n ON Figure 5 3 This is the position the key will be in when the engine is running When the engine is not running use this position to energize the optional devices such as indicators or electric fuel pump START Figure 5 4 Turn the key to this position to start the engine As soon as the engine starts release the key and it will automatically return to the ON position Some key switches may be equip...

Page 31: ...er to the operating instructions for the driven machine The speed control lever Figure 6 1 controls the engine speed The lever could be linked to the engine speed control device The low idle speed limit screw Figure 6 2 sets engine speed while it is idling The high idle speed limit screw Figure 6 3 restricts the maximum engine speed when the engine is operated without a load Figure 6 CAUTION NEVER...

Page 32: ...PRODUCT OVERVIEW 20 L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book 20 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 33: ...nd maintenance techniques See your authorized Yanmar industrial engine dealer or distributor for additional training 0000002en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions Only fill the fuel tank with diesel fuel Filling the fuel tank with gasoline may result in a fire NEVER refuel with the engine running Wipe up all spills immediatel...

Page 34: ...e the engine check for fuel leaks Replace rubberized fuel hoses every two years or every 2000 hours of engine operation whichever comes first even if the engine has been out of service Rubberized fuel lines tend to dry out and become brittle after two years or 2000 hours of engine operation whichever comes first Failure to comply will result in death or serious injury 0000015en A WARNING HIGH PRES...

Page 35: ...e performance to prevent engine damage Only use clean diesel fuel NEVER remove inlet fuel screen from the filler port If removed dirt and debris could get into the fuel system causing it to clog 0000004enLV CAUTION Only use the engine oil specified Other engine oils may affect warranty coverage cause internal engine components to seize or shorten engine life Prevent dirt and debris from contaminat...

Page 36: ...S1 4 should be Max 460 µm at HFRR test Bio Diesel Fuels In Europe and in the United States as well as some other countries non mineral oil based fuel resources such as RME Rapeseed Methyl Ester and SOME Soybean Methyl Ester collectively known as FAME Fatty Acid Methyl Esters are being used as extenders for mineral oil derived diesel fuels Yanmar approves the use of bio diesel fuels that do not exc...

Page 37: ...dards as agreed to by the diesel engine manufacturers and the diesel fuel injection equipment manufacturers or bio diesel fuels that have degraded as per the precautions and concerns above may affect the warranty coverage of your engine See Yanmar Limited Warranty on page vii Filling the Fuel Tank A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain con...

Page 38: ...ose to the engine during engine operation or shortly after shut down Failure to comply will result in death or serious injury 0000014en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions Before you operate the engine check for fuel leaks Replace rubberized fuel hoses every two years or every 2000 hours of engine operation whichever comes fi...

Page 39: ... American Petroleum Institute ACEA Classification Association des Constructeurs Européens d Automobilies JASO Japanese Automobile Standards Organization Notes 1 Be sure the engine oil engine oil storage containers and engine oil filling equipment are free of sediments and water 0001552B 1 2 3 4 CAUTION Only use the engine oil specified Other engine oils may affect warranty coverage cause internal ...

Page 40: ...level 2 Remove oil cap dipstick Figure 3 1 from either location and wipe with clean cloth 3 Fully reinsert oil cap dipstick but do not screw in 4 Remove oil cap dipstick The oil level should be between upper Figure 3 2 and lower Figure 3 3 lines on the oil cap dipstick 5 Fully reinsert oil cap dipstick Figure 3 1 and hand tighten Over tightening the oil cap dipstick will damage it Figure 3 Adding ...

Page 41: ...ged fasteners 5 Check the electrical harnesses for cracks abrasions and damaged or corroded connectors 6 Check hoses for cracks abrasions and damaged loose or corroded clamps Engine Model Dipstick Upper Limit Lower Limit L48N 0 85 0 58 qt 0 80 0 55 L L70N 1 11 0 69 qt 1 05 0 65 L L100N 1 7 1 06 qt 1 6 1 0 L A WARNING HIGH PRESSURE HAZARD Avoid skin contact with the high pressure diesel fuel spray ...

Page 42: ...ery Stays On until the engine is running and the dynamo is supplying charging current This indicator does not indicate whether the battery is discharged Here is a summary of how these indicators function The table shows what happens when you turn the key in a certain direction e g OFF to ON CAUTION If any problem is noted during the visual check the necessary corrective action should be taken befo...

Page 43: ...erating practices and maintenance procedures Machine safety signs and labels are additional reminders for safe operating and maintenance techniques See your authorized Yanmar industrial engine dealer or distributor for additional training 0000002en A DANGER EXPLOSION HAZARD Keep the area around the battery well ventilated While the engine is running or the battery is charging hydrogen gas is produ...

Page 44: ... comply will result in death or serious injury 0000011en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions Only fill the fuel tank with diesel fuel Filling the fuel tank with gasoline may result in a fire NEVER refuel with the engine running Wipe up all spills immediately Keep sparks open flames or any other form of ignition match cigarett...

Page 45: ... is extremely flammable and explosive under certain conditions Before you operate the engine check for fuel leaks Replace rubberized fuel hoses every two years or every 2000 hours of engine operation whichever comes first even if the engine has been out of service Rubberized fuel lines tend to dry out and become brittle after two years or 2000 hours of engine operation whichever comes first Failur...

Page 46: ...re to comply could result in death or serious injury 0000002enLV A WARNING EXHAUST HAZARD NEVER operate the engine in an enclosed area such as a garage tunnel underground room manhole or ship s hold without proper ventilation NEVER block windows vents or other means of ventilation if the engine is operating in an enclosed area All internal combustion engines create carbon monoxide gas during opera...

Page 47: ...engine is installed on a level surface If a continuously running engine is installed at an angle greater than 20 in any direction or if an engine runs for short periods of time less than 3 minutes at an angle greater than 25 in any direction engine oil may enter the combustion chamber causing exessive engine speed and generate white smoke and also may occur unsatisfactory oil pressure These may ca...

Page 48: ...perature is above 40 C or below 10 C If the ambient temperature exceeds 40 C the engine may overheat and cause the engine oil to break down If the ambient temperature falls below 10 C rubber components such as gaskets and seals will harden causing premature engine wear and damage Contact your authorized Yanmar industrial engine dealer or distributor if the engine will be operated in either tempera...

Page 49: ... similar to Figure 2 slide the engine speed control lever Figure 2 1 to the RUN position Figure 2 2 Figure 2 2 If your engine speed control is similar to Figure 3 slide the engine speed control lever Figure 3 1 to the RUN position Figure 3 2 Figure 3 3 If your engine speed control is similar to Figure 4 a Turn the engine speed control knob Figure 4 1 to the left Figure 4 2 b Slide the engine speed...

Page 50: ...the handle all the way out with a strong and even motion Use two hands if necessary 7 Slowly return the recoil starter handle to the initial position 8 If the engine does not start repeat the Start The Engine procedure from Step 1 Figure 5 CAUTION Tips while starting engine with recoil starter See Start The Engine on page 11 Pulling out the recoil starter handle too hard or fast will damage the eq...

Page 51: ... Reinsert the oil plug Figure 6 1 Figure 7 Figure 8 Electric Start Use the following procedure to start the engine Daily Checks 1 Make sure you follow the procedures stated in Daily Checks on page 29 2 Make sure the fuel cock is in the ON position Figure 9 1 Figure 9 1 0001581 1 0001580 CAUTION NEVER use an engine starting aid such as ether Engine damage will result 0000009en 0001347A 1 0001124A 1...

Page 52: ...er Figure 11 1 to the RUN position or Figure 11 2 Figure 11 3 If your engine speed control is similar to Figure 12 a Turn the engine speed control knob Figure 12 1 to the left Figure 12 2 b Slide the engine speed control knob to the START position Figure 12 3 c Turn the engine speed control knob to the right Figure 12 4 to tighten it Figure 12 Start The Engine Use the following procedure to start ...

Page 53: ... runs for short periods of time less than 3 minutes at an angle greater than 25 in any direction engine oil may enter the combustion chamber causing exessive engine speed and generate white smoke and also may occur unsatisfactory oil pressure These may cause serious engine damage 0000010enTNE CAUTION New Engine Break In On the initial engine start up allow the engine to idle for approximately 15 m...

Page 54: ...nt of white exhaust smoke is normal on start up of a cold engine Black exhaust smoke could mean the engine is overloaded or being over fueled If either of these conditions persists contact your authorized Yanmar industrial engine dealer or distributor 5 Check the fuel level during operation If the fuel level runs low stop the engine and refuel A WARNING HIGH PRESSURE HAZARD Avoid skin contact with...

Page 55: ...generator set has only one speed setting When you move the lever to the right it clicks into the RUN position The speed control lever is spring loaded so when you push down on the STOP button the speed control lever moves back to the shut off position There is no idle position or intermediate speeds Figure 15 CAUTION New Engine Break In On the initial engine start up allow the engine to idle for a...

Page 56: ...ypes of engine speed controls are used in L N engine applications The following procedures are for three typical applications Refer to the operating instructions for the driven machine 1 If your engine speed control is similar to Figure 17 slide the engine speed control lever Figure 17 1 to the STOP position Figure 17 2 1 3 2 0001363C CAUTION For maximum engine life Yanmar recommends that when shu...

Page 57: ...le position or intermediate speeds Figure 18 3 If your engine speed control is similar to Figure 19 a Turn the engine speed control knob Figure 19 1 to the left Figure 19 2 b Slide the engine speed control knob to the STOP position Figure 19 3 c Turn the engine speed control knob to the right Figure 19 4 to tighten it Figure 19 Electric Start Models Turn the key to the OFF position Figure 20 1 and...

Page 58: ...le out to the point of resistance the point in the compression stroke where the intake and exhaust valves are closed This helps to prevent rust while the engine is not in use 3 If the engine will not be used for six months or longer follow the additional instructions in Long Term Storage on page 83 0001124B 1 LN Series OperationManual_A4 book 46 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 59: ...ine safety signs and labels are additional reminders for safe operating and maintenance techniques See your authorized Yanmar industrial engine dealer or distributor for additional training 0000002en A DANGER EXPLOSION HAZARD NEVER check the remaining battery charge by shorting out the terminals This will result in a spark and may cause an explosion or fire Use a hydrometer to check the remaining ...

Page 60: ...to comply will result in death or serious injury 0000012en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions Before you operate the engine check for fuel leaks Replace rubberized fuel hoses every two years or every 2000 hours of engine operation whichever comes first even if the engine has been out of service Rubberized fuel lines tend to ...

Page 61: ...ttery to the starter terminals may cause a fire or explosion Failure to comply will result in death or serious injury 0000004en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions NEVER remove the fuel cap with the engine running Failure to comply will result in death or serious injury 0000011en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel...

Page 62: ... after you shut the engine down These surfaces are extremely hot while the engine is operating and could seriously burn you Failure to comply could result in death or serious injury 0000015en A WARNING SEVER HAZARD Keep hands and other body parts away from moving rotating parts such as the cooling fan flywheel Wear tight fitting clothing and keep your hair short or tie it back while the engine is ...

Page 63: ... in death or serious injury 0000005en A WARNING BURN HAZARD Batteries contain sulfuric acid NEVER allow battery fluid to come in contact with clothing skin or eyes Severe burns could result ALWAYS wear safety goggles and protective clothing when servicing the battery If contact with the skin and or eyes should occur flush with a large amount of water and obtain prompt medical treatment Failure to ...

Page 64: ...ious injury If you must service the engine while it is operating remove all jewelry tie long hair back and keep your hands other body parts and clothing away from moving rotating parts Failure to comply could result in death or serious injury 0000010en A WARNING BURN HAZARD If you must drain the engine oil while it is still hot stay clear of the hot engine oil to avoid being scalded Make sure you ...

Page 65: ...exhaust smoke engine overspeed or internal damage 0000005en CAUTION NEVER attempt to modify the engine s design or safety features such as defeating the engine speed limit control or the fuel injection quantity control Failure to comply may impair the engine s safety and performance characteristics and shorten the engine s life Any alterations to this engine may affect the warranty coverage of you...

Page 66: ...r longer than 15 seconds or the starter motor will overheat 0000007en CAUTION For maximum engine life Yanmar recommends that when shutting the engine down you allow the engine to idle without load for 5 minutes This will allow the engine components that operate at high temperatures such as exhaust system to cool slightly before the engine itself is shut down 0000008en CAUTION NEVER use an engine s...

Page 67: ...onment Follow the guidelines of the governmental agency for the proper disposal of hazardous materials such as engine oil diesel fuel and engine coolant Consult the local authorities or reclamation facility NEVER dispose of hazardous materials irresponsibly by dumping them into a sewer on the ground or into ground water or waterways 0000013en CAUTION Establish a periodic maintenance plan according...

Page 68: ...he air cleaner or element s removed This may cause foreign material to enter the engine and damage it 0000026en CAUTION The tightening torque in the Standard Torque Chart page 12 should be carefully observed Apply 60 torque to bolts that are not listed Apply 80 torque when tightened to aluminum alloy 0000023enLVOM LN Series OperationManual_A4 book 56 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 69: ...ntervals Periodic maintenance intervals are every 50 200 400 1000 1500 and 2000 engine hours Failure to perform periodic maintenance will shorten the life of the engine Yanmar Replacement Parts Yanmar recommends that you use genuine Yanmar parts when replacement parts are needed Genuine replacement parts help ensure long engine life Tools Required Before you start any periodic maintenance procedur...

Page 70: ...E CHART CAUTION The tightening torque in the Standard Torque Chart page 12 should be carefully observed Apply 60 torque to bolts that are not listed Apply 80 torque when tightened to aluminum alloy 0000023enLVOM Thread size Pitch mm M6 1 0 M8 1 25 M10 1 5 M12 1 75 M14 1 5 M16 1 5 Tightening Torque N m 10 8 1 0 25 5 2 9 49 0 4 9 88 3 9 8 137 0 9 8 226 0 9 8 kgf m 1 1 0 1 2 6 0 3 5 0 0 5 9 0 1 0 14 ...

Page 71: ...e treated only as a general guideline CAUTION Establish a periodic maintenance plan according to the engine application and make sure you perform the required periodic maintenance at intervals indicated Failure to follow these guidelines will impair the engine s safety and performance characteristics shorten the engine s life and may affect the warranty coverage on your engine See Yanmar Limited W...

Page 72: ...er Driven Machine Indicators If Equipped when engine is started Fuel Injector Inspect Clean Test Fuel Injection Nozzle Engine Oil Check Engine Oil Level Add Engine Oil As Necessary before operation Drain and Refill Engine Oil 1st time 2nd after Clean Engine Oil Filter Replace If Damaged 2nd after Check for Engine Oil Leakage before after operation Engine Speed Control Check for Proper Operation Ve...

Page 73: ...NING BURN HAZARD Batteries contain sulfuric acid NEVER allow battery fluid to come in contact with clothing skin or eyes Severe burns could result ALWAYS wear safety goggles and protective clothing when servicing the battery If contact with the skin and or eyes should occur flush with a large amount of water and obtain prompt medical treatment Failure to comply could result in death or serious inj...

Page 74: ...cators and Controls Electric Starter on page 17 Check Engine Oil Level Before you operate the engine check the engine oil level See Checking Engine Oil on page 28 0000067A 3 1 2 CAUTION Only use the engine oil specified Other engine oils may affect warranty coverage cause internal engine components to seize or shorten engine life Prevent dirt and debris from contaminating the engine oil Carefully ...

Page 75: ...n the spark arrestor Figure 2 1 as follows 1 Remove the locknut Figure 2 2 end cap Figure 2 3 and diffuser discs Figure 2 4 from the spark arrestor Figure 2 A WARNING BURN HAZARD Keep your hands and other body parts away from hot engine surfaces such as the muffler exhaust pipe turbocharger if equipped and engine block during operation and shortly after you shut the engine down These surfaces are ...

Page 76: ...NEVER overfill the fuel tank Fill the fuel tank and store fuel in a well ventilated area only Failure to comply will result in death or serious injury 0000005en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions Be sure to place the diesel fuel container on the ground when transferring the diesel fuel from the pump to the container Hold the...

Page 77: ... and debris could get into the fuel system causing it to clog 0000004enLV A WARNING HIGH PRESSURE HAZARD Avoid skin contact with the high pressure diesel fuel spray caused by a fuel system leak such as a broken fuel injection line High pressure fuel can penetrate your skin and result in serious injury If you are exposed to high pressure fuel spray obtain prompt medical treatment NEVER check for a ...

Page 78: ...riously harm the environment Follow the guidelines of the governmental agency for the proper disposal of hazardous materials such as engine oil diesel fuel and engine coolant Consult the local authorities or reclamation facility NEVER dispose of hazardous materials irresponsibly by dumping them into a sewer on the ground or into ground water or waterways 0000013en Daily After Operation A WARNING B...

Page 79: ...h or serious injury 0000008en A WARNING BURN HAZARD Keep your hands and other body parts away from hot engine surfaces such as the muffler exhaust pipe turbocharger if equipped and engine block during operation and shortly after you shut the engine down These surfaces are extremely hot while the engine is operating and could seriously burn you Failure to comply could result in death or serious inj...

Page 80: ...ally responsible Follow these procedures for hazardous waste disposal Failure to follow these procedures may seriously harm the environment Follow the guidelines of the governmental agency for the proper disposal of hazardous materials such as engine oil diesel fuel and engine coolant Consult the local authorities or reclamation facility NEVER dispose of hazardous materials irresponsibly by dumpin...

Page 81: ...lean Inspect Engine Oil Filter Figure 4 Clean inspect the engine oil filter as follows 1 Remove the oil filter retaining bolt Figure 4 1 2 Pull the oil filter cap Figure 4 2 out and remove the oil filter Figure 4 3 3 Clean the oil filter or replace if damaged 4 Install the oil filter Figure 4 3 5 Make sure the oil filter cap is fully seated Figure 4 2 6 Install and tighten the oil filter retaining...

Page 82: ...el cap Figure 6 1 2 Remove the fuel cap Figure 6 1 from the fuel tank Figure 6 2 1 2 3 4 0001119A 1 0001566A Every 50 Hours of Operation A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosive under certain conditions When you remove any fuel system component to perform maintenance such as changing the fuel filter place an approved container under the opening to catch t...

Page 83: ...eaner Element Applicable Inlet Fuel Screen Part No L48N L70N and L100N 114250 55100 0001552A 1 3 2 Every 200 Hours of Operation A CAUTION FLYING OBJECT HAZARD ALWAYS wear eye protection when servicing the engine and when using compressed air or high pressure water Dust flying debris compressed air pressurized water or steam may injure your eyes Failure to comply may result in minor or moderate inj...

Page 84: ... cleaner element Figure 7 4 10 Install the wing nut Figure 7 3 and hand tighten Overtightening the wing nut will damage the air cleaner assembly 11 Install the air cleaner cover Figure 7 2 12 Install the wing nut Figure 7 1 and hand tighten Overtightening the wing nut will damage the air cleaner assembly Replace Engine Oil and Clean Inspect Engine Oil Filter Applicable Air Cleaner Element Part No ...

Page 85: ...s of the governmental agency for the proper disposal of hazardous materials such as engine oil diesel fuel and engine coolant Consult the local authorities or reclamation facility NEVER dispose of hazardous materials irresponsibly by dumping them into a sewer on the ground or into ground water or waterways 0000013en A DANGER FIRE AND EXPLOSION HAZARD Diesel fuel is extremely flammable and explosiv...

Page 86: ...9 2 and fasten the assembly to the fuel tank using the fuel cock nuts Figure 9 1 9 Tighten the fuel tank drain plug Figure 8 2 with new gasket Figure 8 3 CAUTION Be environmentally responsible Follow these procedures for hazardous waste disposal Failure to follow these procedures may seriously harm the environment Follow the guidelines of the governmental agency for the proper disposal of hazardou...

Page 87: ...ine dealer or distributor for this service Every 400 Hours of Operation A WARNING HIGH PRESSURE HAZARD Avoid skin contact with the high pressure diesel fuel spray caused by a fuel system leak such as a broken fuel injection line High pressure fuel can penetrate your skin and result in serious injury If you are exposed to high pressure fuel spray obtain prompt medical treatment NEVER check for a fu...

Page 88: ...rs should be inspected cleaned and tested every 1500 hours See your authorized Yanmar industrial engine dealer or distributor for this service Every 1000 Hours of Operation Every 1500 Hours of Operation A WARNING HIGH PRESSURE HAZARD Avoid skin contact with the high pressure diesel fuel spray caused by a fuel system leak such as a broken fuel injection line High pressure fuel can penetrate your sk...

Page 89: ... fuel system hoses Every 2000 Hours of Operation CAUTION Be environmentally responsible Follow these procedures for hazardous waste disposal Failure to follow these procedures may seriously harm the environment Follow the guidelines of the governmental agency for the proper disposal of hazardous materials such as engine oil diesel fuel and engine coolant Consult the local authorities or reclamatio...

Page 90: ...PERIODIC MAINTENANCE 78 L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book 78 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 91: ...u continue to operate the engine 0000029en SYMPTOM PROBABLE CAUSE ACTION REFER TO Indicator Turns On Engine Running Engine oil pressure indicator If equipped Low level of engine oil Too high an oil level Check and adjust oil level as necessary Checking Engine Oil on page 28 Clogged engine oil filter Replace engine oil filter element Replace Engine Oil on page 68 Battery Indicator Battery failure C...

Page 92: ... Faulty engine stop solenoid if equipped Starter motor does not operate or rotates too slowly engine can be turned manually Battery needs charging Check electrolyte recharge Check Battery If Equipped on page 61 Faulty cable connection at battery terminals Clean terminals retighten Faulty starter switch See authorized Yanmar industrial engine dealer or distributor Faulty starter motor Engine cannot...

Page 93: ...hours or the number of calendar months Operating conditions when problem occurs Engine rpm Color of exhaust smoke Type of diesel fuel Type of engine oil Any abnormal noises or vibration Operating environment such as high altitude or extreme ambient temperatures etc Engine maintenance history and previous problems Other factors that contribute to the problem White exhaust smoke Improper diesel fuel...

Page 94: ...TROUBLESHOOTING 82 L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book 82 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 95: ... to check the remaining battery charge If the electrolyte is frozen slowly warm the battery before you recharge it Failure to comply will result in death or serious injury 0000007en A WARNING BURN HAZARD Batteries contain sulfuric acid NEVER allow battery fluid to come in contact with clothing skin or eyes Severe burns could result ALWAYS wear safety goggles and protective clothing when servicing ...

Page 96: ...sion position Do not move the speed control lever to the START or RUN position b Turn the key to the start position and turn the engine for 2 to 3 seconds Do not start the engine c Pull the decompression lever up 6 Drain the fuel tank or make sure it is completely full 7 Protect the air cleaner muffler and electrical components dynamo starter motor switches from water and dust 8 Disconnect the neg...

Page 97: ...dle position in your application for approximately 5 to 10 minutes while you check for a proper oil pressure b fuel engine oil or coolant leaks c proper operation of the indicators and or gauges if equipped 3 Avoid prolonged operation at minimum or maximum engine speeds and loads for the remainder of the first hour of operation LN Series OperationManual_A4 book 85 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 98: ...LONG TERM STORAGE 86 L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book 86 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 99: ...emarks Big Oilpan Special Specifications etc Fan Case FO Tank and FO Pump Muffler Speed Control Device Air Cleaner Starting Motor Recoil PTO Flange RPM Emission Controlled or Not Base Name AVAILABLE ENGINE SPEED INTENDED USES 2500 3450 rpm min 1 Agricultural Constructive Industrial Machines 3600 rpm min 1 Generator Sets Pumps LN Series OperationManual_A4 book 87 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 100: ...mperature 25 C Atmospheric pressure 100 kPa 750mm Hg Relative humidity 30 Fuel Temperature at Fuel Injector Pump Inlet 40 C With Cooling Fan Air Cleaner Muffler Yanmar Standard After Engine Break In Period Output Allowable Deviation 3 1 PS 0 7355 kW Type Vertical Air Cooled 4 Cycle Diesel Engine Combustion System Direct Injection Starting System Electric Starting and or Recoil Starting Cooling Sys...

Page 101: ... 4 9 4 5 7 4 6 5 PS 4 7 4 2 6 7 6 1 10 0 8 8 High Idling rpm min 1 3800 30 3175 30 3800 30 3175 30 3800 30 3175 30 Engine Weight Dry with Electric Start 32 0 kg 41 0 kg 53 5 kg without Electric Start 27 0 kg 36 0 kg 48 5 kg Cooling System Forced Air by Flywheel Fan Lubricating System Forced Lubrication with Trochoid Pump Starting System Electric Start Recoil Start Dimensions L x W x H 332 x 384 x ...

Page 102: ...SPECIFICATIONS 90 L N Operation Manual This Page Intentionally Left Blank LN Series OperationManual_A4 book 90 ページ２００６年５月１２日金曜日午前１０時１８分 ...

Page 103: ...cancer and reproductive harm Wash hands after handling Head Office Yanmar Co Ltd 1 32 Chayamachi Kita ku Osaka 530 8311 Japan http www yanmar co jp Yanmar America Corporation 951 Corporate Grove Drive Buffalo Grove IL 60089 4508 U S A TEL 1 847 541 1900 FAX 1 847 541 2161 http www yanmar com Yanmar Europe B V Brugplein11 1332 BS Almere de Vaart The Netherlands TEL 31 36 5493200 FAX 31 36 5493209 h...

Page 104: ...L48N L70N L100N 0ALN0 G00100 PRINTED IN JAPAN ...

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