L48N L70N L100N 0ALN0-G00100 PRINTED IN JAPAN
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 http://www.yanmar.nl Yanmar Asia (Singapore) Corporation Pte. Ltd. 4 Tuas Lane, Singapore 638613 TEL: 65-68615077 FAX: 65-68611509 http://www.
LN Series OperationManual_A4.book i ページ ２００６年５月１２日 金曜日 午前１０時１８分 INTRODUCTION L-N Operation Manual Welcome to the world of Yanmar Engines! Yanmar has been the leader in industrial diesel engines for over 90 years. We developed the world’s first practical small-sized diesel engine in 1933. Our engineers are continuously developing new technology to keep Yanmar on the leadingedge of the industry. The L-N Series engine is only one example of the new technology we have developed.
LN Series OperationManual_A4.book ii ページ ２００６年５月１２日 金曜日 午前１０時１８分 INTRODUCTION RECORD OF OWNERSHIP Take a few moments to record the information you need when you contact Yanmar for service, parts or literature. Engine Model: _____________________________________________________________________ Engine Serial No.
LN Series OperationManual_A4.book iii ページ ２００６年５月１２日 金曜日 午前１０時１８分 TABLE OF CONTENTS L-N Operation Manual Page Introduction .............................................................................................. i Record of Ownership........................................................................... ii Table of Contents ................................................................................... iii Yanmar Warranties..................................................................
LN Series OperationManual_A4.book iv ページ ２００６年５月１２日 金曜日 午前１０時１８分 TABLE OF CONTENTS Product Overview.................................................................................. 13 Yanmar L-N Series Engine Features and Applications ..................... 13 Component Identification................................................................... 14 Location of Labels ............................................................................. 15 Function of Major Engine Components ...............
LN Series OperationManual_A4.book v ページ ２００６年５月１２日 金曜日 午前１０時１８分 TABLE OF CONTENTS Periodic Maintenance ........................................................................... 47 Precautions ....................................................................................... 57 The Importance of Periodic Maintenance.................................... 57 Performing Periodic Maintenance ............................................... 57 The Importance of Daily Checks ..............................
LN Series OperationManual_A4.
LN Series OperationManual_A4.book vii ページ ２００６年５月１２日 金曜日 午前１０時１８分 YANMAR WARRANTIES L-N Operation Manual YANMAR LIMITED WARRANTY What is Covered by this Warranty? Yanmar warrants to the original retail purchaser that a new Yanmar L-N Series Industrial Engine will be free from defects in material and / or workmanship for the duration of the warranty period. THIS WARRANTY IS PROVIDED IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LN Series OperationManual_A4.book viii ページ ２００６年５月１２日 金曜日 午前１０時１８分 YANMAR WARRANTIES Yanmar Limited Warranty - Continued To Locate an Authorized Yanmar Industrial Engine Dealer or Distributor: You can locate your nearest authorized Yanmar industrial engine dealer or distributor by visiting the Yanmar Corp., LTD. website at: http://www.yanmar.co.jp (The Japanese language page will be displayed.) For English language “click” on “English Page.
LN Series OperationManual_A4.book ix ページ ２００６年５月１２日 金曜日 午前１０時１８分 YANMAR WARRANTIES Yanmar Limited Warranty - Continued Warranty Limitations: The foregoing is Yanmar’s only obligation to you and your exclusive remedy for breach of warranty. Failure to follow the requirements for submitting a claim under this Warranty may result in a waiver of all claims for damages and other relief.
LN Series OperationManual_A4.
LN Series OperationManual_A4.book 1 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY L-N Operation Manual SAFETY STATEMENTS Yanmar is concerned for your safety and your machine’s condition. Safety statements are one of the primary ways to call your attention to the potential hazards associated with Yanmar L-N Series engine operation.
LN Series OperationManual_A4.book 2 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY SAFETY PRECAUTIONS During Operation and Maintenance A DANGER Before You Operate CAUTION EXPLOSION HAZARD! NEVER permit anyone to operate the engine or driven machine without proper training. • Read and understand this Operation Manual before you operate the machine to ensure that you follow safe operating practices and maintenance procedures.
LN Series OperationManual_A4.book 3 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Only use the key switch to start the engine. • Diesel fuel is extremely flammable and explosive under certain conditions. • NEVER jump start the engine. Sparks caused by jumping the battery to the starter terminals may cause a fire or explosion. • NEVER remove the fuel cap with the engine running.
LN Series OperationManual_A4.book 4 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. • 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.
LN Series OperationManual_A4.book 5 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY A DANGER A WARNING SEVER HAZARD! CRUSH HAZARD! • When you need to transport an engine for repair, have a helper assist you to attach it to a hoist and load it on a truck. • NEVER stand under a hoisted engine. If the hoist mechanism fails, the engine will fall on you, causing serious injury or death. • Failure to comply will result in death or serious injury.
LN Series OperationManual_A4.book 6 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY A WARNING 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 operation.
LN Series OperationManual_A4.book 7 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY A WARNING 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 comply could result in death or serious injury.
LN Series OperationManual_A4.book 8 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY A WARNING A CAUTION 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 wear eye protection. • Failure to comply could result in death or serious injury. 0000011en FLYING OBJECT HAZARD! • ALWAYS wear eye protection when servicing the engine and when using compressed air or high-pressure water.
LN Series OperationManual_A4.book 9 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY CAUTION CAUTION If any problem is noted during the visual check, the necessary corrective action should be taken before you operate the engine. Observe the following environmental operating conditions to maintain engine performance and avoid premature engine wear: 0000021en CAUTION NEVER hold the key in the START position for longer than 15 seconds or the starter motor will overheat.
LN Series OperationManual_A4.book 10 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY CAUTION CAUTION Observe the following environmental operating conditions to maintain engine performance and avoid premature engine wear: • NEVER run the engine if the ambient temperature 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.
LN Series OperationManual_A4.book 11 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY CAUTION CAUTION Make sure the 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.
LN Series OperationManual_A4.book 12 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SAFETY CAUTION CAUTION The tightening torque in the Standard Torque Chart (page 12) should be carefully observed. • When the engine is operated in dusty conditions, clean the air cleaner element more frequently. • Apply 60% torque to bolts that are not listed. • NEVER operate the engine with the air cleaner or element(s) removed. This may cause foreign material to enter the engine and damage it.
LN Series OperationManual_A4.book 13 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW L-N Operation Manual YANMAR L-N SERIES ENGINE FEATURES AND APPLICATIONS To achieve the highest performing miniaturized and light-weight diesel engines, Yanmar Co., Ltd. developed the L-N series single cylinder, aircooled, diesel engine using the most advanced single cylinder technologies. Especially, the fuel injection pump / line / nozzle direct-injection system has been optimized to reduce emissions.
LN Series OperationManual_A4.book 14 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW COMPONENT IDENTIFICATION Figure 1 shows where major engine components are located. (1) (11) (3) (10) (2) (4) (9) (8) (5) (7) (12) (6) (13) (6) (7) 0001126A Figure 1 1. 2. 3. 4. 5. 6. 7. Fuel Drain Plug Decompression Lever Air Cleaner Recoil Starter Handle Recoil Starter Oil Cap / Dipstick Oil Drain Plug 8. Engine Speed Control Lever 9. Fuel Injection Pump 10. Fuel Cock 11. Fuel Tank 12. PTO Shaft 13.
LN Series OperationManual_A4.book 15 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW LOCATION OF LABELS Figure 2 shows the location of regulatory and safety labels on Yanmar L-N Series engines. (1) 0001126C-01 Figure 2 Typical location of the engine nameplate is shown (Figure 2, (1)).
LN Series OperationManual_A4.book 16 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW FUNCTION OF MAJOR ENGINE COMPONENTS Components Functions Air Cleaner The air cleaner prevents airborne contaminants from entering the engine. Periodic replacement of the air cleaner filter element is necessary. See the Periodic Maintenance Schedule on page 59 for the replacement frequency.
LN Series OperationManual_A4.book 17 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW AIR COOLED ENGINE Decompression Lever The L-N engine is air-cooled by means of a cooling fan. The cooling system consists of a fan attached to the flywheel. The decompression lever (Figure 4, (1)) helps you start 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.
LN Series OperationManual_A4.book 18 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW Indicators (1) (2) OFF (3) O N START Battery - (Figure 5, (1)) - Your driven machine may have a battery indicator that comes on if there is a problem in the charging system. This indicator does not indicate whether the battery is discharged. See Troubleshooting Chart on page 79. (4) Heat - If your engine has an inlet air heater, it may have a heat indicator that lights when the inlet air heater is activated.
LN Series OperationManual_A4.book 19 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PRODUCT OVERVIEW Inlet Air Heater Some engines may be equipped with an inlet air heater. Heated inlet air helps the engine to start easier in cold weather. During the engine starting sequence the inlet air heater is activated for several seconds. If the engine is equipped with an air inlet heater timer, after the heat indicator goes out, the engine can be started.
LN Series OperationManual_A4.
LN Series OperationManual_A4.book 21 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE L-N Operation Manual This section of the Operation Manual describes the diesel fuel and engine oil specifications and how to replenish them. It also describes the daily engine checkout. A DANGER CAUTION FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. NEVER permit anyone to operate the engine or driven machine without proper training.
LN Series OperationManual_A4.book 22 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. • 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.
LN Series OperationManual_A4.book 23 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE A WARNING CAUTION • Only use diesel fuels recommended by Yanmar for the best engine performance, to prevent engine damage. • Only use clean diesel fuel. 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.
LN Series OperationManual_A4.book 24 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE DIESEL FUEL • PAH (polycyclic aromatic hydrocarbons) content should be below 10% by volume. Diesel Fuel Specifications Diesel fuel should comply with the following specifications. The table lists several worldwide specifications for diesel fuels. Diesel Fuel Specification Location • Metal content of Na, Mg, Si, and Al should be equal to or lower than 1 mass ppm.
LN Series OperationManual_A4.book 25 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE 3. High viscosity at low temperatures may result in fuel delivery problems, injection pump seizures, and poor injection nozzle spray atomization. Filling the Fuel Tank A DANGER 4. FAME may have adverse effects on some elastomers (seal materials) and may result in fuel leakage and dilution of the engine lubricating oil. 5.
LN Series OperationManual_A4.book 26 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. • 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.
LN Series OperationManual_A4.book 27 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE ENGINE OIL 1. Clean the area around the fuel cap (Figure 1, (1)). 2. Remove the fuel cap (Figure 1, (1)) from the fuel tank (Figure 1, (3)). 3. Stop fueling when the fuel is at the same level as the red ring (Figure 1, (4)) at the bottom of the inlet fuel screen. NEVER overfill the fuel tank. 4. Replace the fuel cap (Figure 1, (1)) and hand tighten. Over-tightening the fuel cap will damage it.
LN Series OperationManual_A4.book 28 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE 2. Change the engine oil after the first 50 hours of operation and then at every 200 hours thereafter. 3. Select the oil viscosity based on the ambient temperature where the engine is being operated. See SAE Service Grade Viscosity Chart (Figure 2). 5. Fully reinsert oil cap / dipstick (Figure 3, (1)) and hand tighten. Over-tightening the oil cap / dipstick will damage it. (1) 4.
LN Series OperationManual_A4.book 29 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE Engine Oil Capacity (Typical) DAILY CHECKS The following are the engine oil capacities for various Yanmar L-N Series engines. Before you begin any job, make sure the Yanmar L-N Series engine is in good operating condition. Make sure you check the following items before you start your shift and have any repairs completed before you start work. Engine Model Dipstick Upper Limit/ Lower Limit L48N 0.85 / 0.58 qt (0.
LN Series OperationManual_A4.book 30 ページ ２００６年５月１２日 金曜日 午前１０時１８分 BEFORE YOU OPERATE 2. Check engine speed control for proper adjustments. CAUTION If any problem is noted during the visual check, the necessary corrective action should be taken before you operate the engine. Check Indicators If your engine has an electric starter, check the battery indicator. Also check any other indicators supplied by the driven machine manufacturer.
LN Series OperationManual_A4.book 31 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION L-N Operation Manual This section of the Operation Manual describes the procedures for starting the engine, checking engine performance during operation, and shutting the engine down. A DANGER CAUTION EXPLOSION HAZARD! NEVER permit anyone to operate the engine or driven machine without proper training.
LN Series OperationManual_A4.book 32 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Only use the key switch to start the engine. • Diesel fuel is extremely flammable and explosive under certain conditions. • NEVER jump start the engine. Sparks caused by jumping the battery to the starter terminals may cause a fire or explosion. • Only fill the fuel tank with diesel fuel.
LN Series OperationManual_A4.book 33 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. • 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.
LN Series OperationManual_A4.book 34 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION A WARNING A WARNING SEVER HAZARD! EXHAUST 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 running. • Remove all jewelry before you operate or service the machine. • NEVER start the engine in gear.
LN Series OperationManual_A4.book 35 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION A WARNING CAUTION 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 you are working near moving / rotating parts such as the cooling fan, flywheel or PTO shaft.
LN Series OperationManual_A4.book 36 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION CAUTION CAUTION Observe the following environmental operating conditions to maintain engine performance and avoid premature engine wear: Observe the following environmental operating conditions to maintain engine performance and avoid premature engine wear: • Avoid operating in extremely dusty conditions.
LN Series OperationManual_A4.book 37 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION STARTING THE ENGINE (1) Recoil Start (2) CAUTION NEVER use an engine starting aid such as ether. Engine damage will result. STOP SLOW RUN 0000009en Use the following procedure to start the engine. 0001354A 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 1, (1)). Figure 2 2.
LN Series OperationManual_A4.book 38 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION (1) (2) (4) (3) 4. Push the decompression lever (Figure 8, (1)) down and release it. 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. 5.
LN Series OperationManual_A4.book 39 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION In Cold Weather - L48N Only (1) If you have trouble pulling the recoil handle on an L48N engine in cold weather follow this procedure: 1. Remove the oil plug (Figure 6, (1)). 2. Add 2 cc of engine oil to the oil port (Figure 7, (1)). (1) 0001347A Figure 8 Electric Start CAUTION NEVER use an engine starting aid such as ether. Engine damage will result.
LN Series OperationManual_A4.book 40 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION Set Engine Speed Control to START Several types 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 10 slide the engine speed control lever (Figure 10, (1)) to the RUN position (Figure 10, (2)). 3.
LN Series OperationManual_A4.book 41 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION 2. Turn the key clockwise to the START position (Figure 13, (1)). Release the key as soon as the engine starts. It will return to the ON position (Figure 13, (2)). 3. If the engine fails to start: (a) Wait until the engine comes to a complete stop before you attempt to start it again. Engaging the starter while the engine is still rotating will result in damage to the starter motor and flywheel.
LN Series OperationManual_A4.book 42 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION 1. After the engine has reached operating temperature, all of the indicators (if equipped) should be Off. If any of the indicators are On, shut down the engine and have the necessary repairs performed. A WARNING 4. Check for white or black smoke from the exhaust system. A small amount of white exhaust smoke is normal on start-up of a cold engine.
LN Series OperationManual_A4.book 43 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION ADJUST ENGINE SPEED (1) CAUTION New Engine Break In: • On the initial engine start-up, allow the engine to idle for approximately 15 minutes while you check for proper engine oil pressure, diesel fuel leaks, engine oil leaks, and for proper operation of the indicators and / or gauges. • During the first hour of operation, vary the engine speed and the load on the engine.
LN Series OperationManual_A4.book 44 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION 3. If your engine speed control is similar to Figure 16: (a) Turn the engine speed control knob (Figure 16, (1)) to the left (Figure 16, (2)). (b) Slide the engine speed control knob in the direction shown to adjust the engine speed. (c) Turn the engine speed control knob to the right (Figure 16, (3)) to tighten it.
LN Series OperationManual_A4.book 45 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION 3. If your engine speed control is similar to Figure 19: (1) (a) Turn the engine speed control knob (Figure 19, (1)) to the left (Figure 19, (2)). STOP SLOW (b) Slide the engine speed control knob to the STOP position (Figure 19, (3)). RUN (c) Turn the engine speed control knob to the right (Figure 19, (4)) to tighten it. (2) 0001361A (2) (3) Figure 17 2.
LN Series OperationManual_A4.book 46 ページ ２００６年５月１２日 金曜日 午前１０時１８分 ENGINE OPERATION After The Engine Stops 1. Move the fuel cock lever to the closed position (Figure 21, (1)). (1) 0001124B Figure 21 2. Slowly pull the recoil starter handle 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.
LN Series OperationManual_A4.book 47 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE L-N Operation Manual This section of the Operation Manual describes the procedures for proper care and maintenance of the engine. A DANGER CAUTION EXPLOSION HAZARD! NEVER permit anyone to operate the engine or driven machine without proper training. • Read and understand this Operation Manual before you operate the machine to ensure that you follow safe operating practices and maintenance procedures.
LN Series OperationManual_A4.book 48 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. • 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. • Before you operate the engine, check for fuel leaks.
LN Series OperationManual_A4.book 49 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE A DANGER A DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. • 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.
LN Series OperationManual_A4.book 50 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE A WARNING A WARNING EXHAUST HAZARD! SEVER 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 operation.
LN Series OperationManual_A4.book 51 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE A WARNING A WARNING ALCOHOL AND DRUG HAZARD! • NEVER operate 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 BURN HAZARD! • Batteries contain sulfuric acid. NEVER allow battery fluid to come in contact with clothing, skin or eyes. Severe burns could result.
LN Series OperationManual_A4.book 52 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE A WARNING A WARNING BURN HAZARD! 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 and terminals clean. • Failure to comply could result in death or serious injury.
LN Series OperationManual_A4.book 53 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE CAUTION CAUTION • Only use diesel fuels recommended by Yanmar for the best engine performance, to prevent engine damage. • 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. • Only use clean diesel fuel. • NEVER remove inlet fuel screen from the filler port.
LN Series OperationManual_A4.book 54 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE CAUTION CAUTION Observe the following environmental operating conditions to maintain engine performance and avoid premature engine wear: • NEVER run the engine if the ambient temperature 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.
LN Series OperationManual_A4.book 55 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE CAUTION CAUTION It is important to perform daily checks. See Daily Checks on page 9. Periodic maintenance prevents unexpected downtime, reduces the number of accidents due to poor machine performance and helps extend the life of the engine. 0000060enLVOM CAUTION NEVER engage the starter motor while the engine is running. This may damage the starter motor pinion and / or ring gear.
LN Series OperationManual_A4.book 56 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE 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 CAUTION The tightening torque in the Standard Torque Chart (page 12) should be carefully observed. • Apply 60% torque to bolts that are not listed.
LN Series OperationManual_A4.book 57 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE PRECAUTIONS The Importance of Daily Checks The Importance of Periodic Maintenance Engine deterioration and wear occurs in proportion to length of time the engine has been in service and the conditions the engine is subject to during operation. Periodic maintenance prevents unexpected downtime, reduces the number of accidents due to poor machine performance and helps extend the life of the engine.
LN Series OperationManual_A4.book 58 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Tightening Fasteners Use the correct amount of torque when you tighten fasteners on the machine. Applying excessive torque may damage the fastener or component and not enough torque may cause a leak or component failure. CAUTION The tightening torque in the Standard Torque Chart (page 12) should be carefully observed. • Apply 60% torque to bolts that are not listed.
LN Series OperationManual_A4.book 59 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE PERIODIC MAINTENANCE SCHEDULE Daily and periodic maintenance is important to keep the engine in good operating condition. The following is a summary of maintenance items by periodic maintenance intervals. Periodic maintenance intervals vary depending on engine application, loads, diesel fuel and engine oil used and are hard to establish definitively. The following should be treated only as a general guideline.
LN Series OperationManual_A4.book 60 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE : Check : Replace : Contact your authorized Yanmar industrial engine dealer or distributor for these maintenance services.
LN Series OperationManual_A4.book 61 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE PERIODIC MAINTENANCE PROCEDURES A WARNING Daily, Before Operation Perform the following maintenance daily before operation. • Check Battery (If Equipped) • Check Battery Indicator (If Equipped) • Check Engine Oil Level • Check For Engine Oil Leakage • Check Engine Speed Control (First Time Only) • Check Spark Arrestor (If Equipped) BURN HAZARD! • Batteries contain sulfuric acid.
LN Series OperationManual_A4.book 62 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Check Engine Oil Level (3) (2) (1) 0000067A Figure 1 • When the amount of fluid nears the lower limit (Figure 1, (1)), fill with distilled water (Figure 1, (2)) so it is at the upper limit (Figure 1, (3)). If operation continues with insufficient battery fluid, the battery life is shortened, and the battery may overheat and explode. During the summer, check the fluid level more often than specified.
LN Series OperationManual_A4.book 63 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Check For Engine Oil Leakage Check Spark Arrestor (If Equipped) A WARNING A WARNING BURN HAZARD! 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.
LN Series OperationManual_A4.book 64 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE 2. Clean any carbon deposits from the spark arrestor. A DANGER 3. Install the diffuser discs (Figure 2, (4)) and end cap (Figure 2, (3)) on the spark arrestor (Figure 2, (1)) and secure with the locknut (Figure 2, (2)). FIRE AND EXPLOSION HAZARD! Check Fuel Level • Diesel fuel is extremely flammable and explosive under certain conditions.
LN Series OperationManual_A4.book 65 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Check For Fuel Leakage A DANGER A WARNING 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.
LN Series OperationManual_A4.book 66 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE CAUTION Daily, After Operation • Check For Engine Oil Leakage • Check For Fuel Leakage Check For Engine Oil Leakage Be environmentally responsible. Follow these procedures for hazardous waste disposal. Failure to follow these procedures may seriously harm the environment.
LN Series OperationManual_A4.book 67 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Check For Fuel Leakage CAUTION 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 fuel leak with your hands.
LN Series OperationManual_A4.book 68 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE After Initial 50 Hours of Operation CAUTION Perform the following maintenance after the initial 50 hours of operation. • Replace Engine Oil • Clean / Inspect Engine Oil Filter A WARNING Be environmentally responsible. Follow these procedures for hazardous waste disposal. Failure to follow these procedures may seriously harm the environment.
LN Series OperationManual_A4.book 69 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE The engine oil on a new engine becomes contaminated from the initial break-in of internal parts. The initial 50 hour oil change and filter cleaning is very important. Clean / Inspect Engine Oil Filter Drain the engine oil as follows: (3) 1. Make sure the engine is level. (2) (1) 2. Start the engine and bring it up to operating temperature. 3. Stop the engine. 4.
LN Series OperationManual_A4.book 70 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Every 50 Hours of Operation (1) Perform the following maintenance every 50 hours of operation. • Clean Inlet Fuel Screen Clean Inlet Fuel Screen (2) (3) A DANGER (4) 0001119A (1) FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. 0001566A Figure 5 10. Recheck the engine oil level by fully inserting, but not screwing in, the dipstick. 11.
LN Series OperationManual_A4.book 71 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Every 200 Hours of Operation (1) (3) Perform the following maintenance every 200 hours of operation. • Clean Air Cleaner Element (2) • Replace Engine Oil and Clean / Inspect Engine Oil Filter • Check Engine Speed Control 0001552A Figure 6 3. Lift out the inlet fuel screen (Figure 6, (3)). 4. Clean the inlet fuel screen or replace if damaged.
LN Series OperationManual_A4.book 72 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE The engine performance is adversely affected when the air cleaner element is clogged with dust. Be sure to clean the air filter element periodically. 1. Remove the wing nut (Figure 7, (1)). 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 2.
LN Series OperationManual_A4.book 73 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Drain the Fuel Tank and Replace Outlet Fuel Filter CAUTION A DANGER 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.
LN Series OperationManual_A4.book 74 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE 4. Loosen the fuel cock nuts (Figure 9, (1)) on either side of the fuel cock (Figure 9, (2)). CAUTION 5. Remove and discard the O-ring (Figure 9, (3)). Be environmentally responsible. Follow these procedures for hazardous waste disposal. Failure to follow these procedures may seriously harm the environment. 6.
LN Series OperationManual_A4.book 75 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE 10. Replace the fuel cap (Figure 8, (1)) and hand tighten. Overtightening the fuel cap will damage it. Refill fuel tank. See Filling the Fuel Tank on page 25. Every 400 Hours of Operation Perform the following maintenance every 400 hours of operation.
LN Series OperationManual_A4.book 76 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Every 1000 Hours of Operation Every 1500 Hours of Operation Perform the following maintenance every 1000 hours of operation. Perform the following maintenance every 1500 hours of operation. • Check Compression • Inspect, Clean and Test Fuel Injection Nozzle Check Compression Checking the engine compression is required every 1000 hours to obtain optimum engine performance.
LN Series OperationManual_A4.book 77 ページ ２００６年５月１２日 金曜日 午前１０時１８分 PERIODIC MAINTENANCE Every 2000 Hours of Operation Perform the following maintenance every 2000 hours of operation. • Check and Replace Fuel Hoses CAUTION Be environmentally responsible. Follow these procedures for hazardous waste disposal. Failure to follow these procedures may seriously harm the environment.
LN Series OperationManual_A4.
LN Series OperationManual_A4.book 79 ページ ２００６年５月１２日 金曜日 午前１０時１８分 TROUBLESHOOTING L-N Operation Manual If a problem occurs, stop the engine immediately. Refer to the SYMPTOM column in the Troubleshooting Chart to identify the problem. CAUTION CAUTION If any indicator fails to illuminate when the key switch is in the ON position, see your authorized Yanmar industrial engine dealer or distributor for service before operating the engine.
LN Series OperationManual_A4.
LN Series OperationManual_A4.
LN Series OperationManual_A4.
LN Series OperationManual_A4.book 83 ページ ２００６年５月１２日 金曜日 午前１０時１８分 LONG TERM STORAGE L-N Operation Manual This section of the Operation Manual describes the procedures necessary to place the engine into long term storage (six months or longer) and how to place it back into operation. BEFORE YOU PLACE THE ENGINE IN LONG TERM STORAGE 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.
LN Series OperationManual_A4.book 84 ページ ２００６年５月１２日 金曜日 午前１０時１８分 LONG TERM STORAGE 4. Recoil start engines: A CAUTION (a) Push the decompression lever down and hold it while slowly pulling the recoil starter 2 or 3 times. Do not start the engine. 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.
LN Series OperationManual_A4.book 85 ページ ２００６年５月１２日 金曜日 午前１０時１８分 LONG TERM STORAGE RETURNING THE ENGINE TO SERVICE 1. Perform the Daily Checks on page 29. 2. Start the engine. Allow the engine to idle, or run without load if there is no idle 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.
LN Series OperationManual_A4.
LN Series OperationManual_A4.book 87 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SPECIFICATIONS L-N Operation Manual GENERAL Description of Model Number L48 L70 L100 1 2 3 4 5 6 7 8 9 10 11 N 6 A F 1 T 1 A A S 1 Remarks (Big Oilpan, Special Specifications, etc.
LN Series OperationManual_A4.book 88 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SPECIFICATIONS Engine General Specifications Type Vertical, Air Cooled, 4-Cycle Diesel Engine Combustion System Direct Injection Starting System Electric Starting and/or Recoil Starting Cooling System Fan on Flywheel Lubricating System Forced Lubrication With Trochoid Pump Direction of Rotation Counterclockwise Viewed from PTO Side Notes: 1.
LN Series OperationManual_A4.book 89 ページ ２００６年５月１２日 金曜日 午前１０時１８分 SPECIFICATIONS PRINCIPAL ENGINE SPECIFICATIONS Engine Specifications Engine Model L48N L70N Type L100N 4-stroke, Vertical Cylinder, Air-Cooled Diesel Engine No. of Cylinders 1 Bore × Stroke 70 × 57 mm 78 × 67 mm 86 × 75 mm Displacement 0.219 L 0.320 L 0.435 L Continuous Rated Output rpm (min-1) 3600 3000 3600 3000 3600 3000 kW 3.1 2.8 4.4 4.1 6.6 5.7 PS 4.2 3.8 6.0 5.5 9.0 7.
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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 http://www.yanmar.nl Yanmar Asia (Singapore) Corporation Pte. Ltd. 4 Tuas Lane, Singapore 638613 TEL: 65-68615077 FAX: 65-68611509 http://www.
L48N L70N L100N 0ALN0-G00100 PRINTED IN JAPAN
