Yanmar L48N Operation Manual
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Yanmar L48N Operation Manual

Industrial engines
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Summary of Contents for Yanmar L48N

  • Page 1 L48N L70N L100N...

  • Page 2: Proposition 65 Warning

    California California Proposition 65 Warning Proposition 65 Warning Diesel engine exhaust and some of its Battery posts, terminals, and related accessories contain lead and lead constituents are known to the state of compounds, chemicals known to the California to cause cancer, birth state of California to cause cancer and defects, and other reproductive harm.

  • Page 3: Introduction

    Please refer to the manual provided by the To help you enjoy your Yanmar L-N Series engine manufacturer of these components. for many years to come, please follow these recommendations: •...

  • Page 4: Record Of Ownership

    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.: __________________________________________________________________ Date Purchased: ___________________________________________________________________ Dealer:____________________________________________________________________________ Dealer Phone:______________________________________________________________________ L-N Operation Manual...

  • Page 5: Table Of Contents

    What is Covered by this Warranty? ..........vii How Long is the Warranty Period?..........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? ........
  • Page 6 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 ..........16 Air Cooled Engine ................17 Controls - Recoil Starter ..............17 Recoil Starter................
  • Page 7 The Importance of Daily Checks ..........57 Keep a Log of Engine Hours and Daily Checks ......57 Yanmar Replacement Parts ............57 Tools Required ................57 Ask Your Authorized Yanmar Industrial Engine Dealer or Distributor For Help............57 Tightening Fasteners..............58 Standard Torque Chart..............58 Periodic Maintenance Schedule............
  • Page 8 TABLE OF CONTENTS This Page Intentionally Left Blank L-N Operation Manual...

  • Page 9: Yanmar Warranties

    (2000) engine operation hours, 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.

  • Page 10: To Locate An Authorized Yanmar Industrial Engine Dealer Or Distributor

    • “Click” on the desired country or Associate company to locate your nearest authorized Yanmar industrial engine dealer or distributor. • You may also contact Yanmar by clicking on “Inquiry” in the web site heading and typing in your question or comment.

  • Page 11: Warranty Limitations

    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. In no event shall Yanmar or any authorized industrial engine dealer or distributor be liable for incidental, special or consequential damages.
  • Page 12 YANMAR WARRANTIES This Page Intentionally Left Blank L-N Operation Manual...

  • Page 13: Safety

    SAFETY L-N Operation Manual SAFETY STATEMENTS WARNING Yanmar is concerned for your safety and your Warning (the word “WARNING” is in machine’s condition. Safety statements are one black letters with an orange rectangle of the primary ways to call your attention to the behind it) –...

  • Page 14: Safety Precautions

    • Machine safety signs and labels are 0000003en additional reminders for safe operating and maintenance techniques. DANGER • See your authorized Yanmar industrial engine dealer or distributor for additional training. 0000002en FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions.
  • Page 15 SAFETY DANGER DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and • Only use the key switch to start the explosive under certain conditions. engine. • NEVER remove the fuel cap with the •...
  • Page 16 SAFETY DANGER DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and • Diesel fuel is extremely flammable and explosive under certain conditions. explosive under certain conditions. • Before you operate the engine, check •...
  • Page 17 SAFETY DANGER WARNING SEVER HAZARD! CRUSH HAZARD! • Keep hands and other body parts • When you need to transport an engine away from moving / rotating parts for repair, have a helper assist you to such as the cooling fan / flywheel. attach it to a hoist and load it on a •...
  • Page 18 SAFETY WARNING WARNING EXHAUST HAZARD! EXPOSURE HAZARD! • NEVER operate the engine in an enclosed area such as a garage, • Wear personal protective equipment tunnel, underground room, manhole or such as gloves, work shoes, eye and ship’s hold without proper ventilation. hearing protection as required by the task at hand.
  • Page 19 Have your authorized other body parts and clothing away Yanmar industrial engine dealer or from moving / rotating parts. distributor repair the damage. • Failure to comply could result in death •...
  • Page 20 • Failure to comply may result in minor or moderate injury. WARNING 0000003en CAUTION • Only use diesel fuels recommended by Yanmar for the best engine BURN HAZARD! performance, to prevent engine • Keep your hands and other body parts damage. away from hot engine surfaces such •...
  • Page 21 SAFETY CAUTION CAUTION If any problem is noted during the visual Observe the following environmental check, the necessary corrective action operating conditions to maintain engine should be taken before you operate the performance and avoid premature engine. engine wear: • Avoid operating in extremely dusty 0000021en conditions.
  • Page 22 CAUTION extreme. • NEVER overfill the engine with engine • Contact your authorized Yanmar oil. industrial engine dealer or distributor if you need to operate the engine at • ALWAYS keep the oil level between the high altitudes.
  • Page 23 Any alterations to this and also may occur unsatisfactory oil engine may affect the warranty pressure. These may cause serious coverage of your engine. See Yanmar engine damage. Limited Warranty on page 1. 0000010enTNE 0000044enLVOM...
  • Page 24 • NEVER allow the recoil starter handle See Yanmar Limited Warranty on page 1. to snap back against the engine. Consult your authorized Yanmar Return the handle to the starting...

  • Page 25: Product Overview

    To achieve the highest performing miniaturized driven machine. In belt drive engine applications, and light-weight diesel engines, Yanmar Co., Ltd. a belt drive is used to power the driven machine. developed the L-N series single cylinder, air-...

  • Page 26: Component Identification

    11. Fuel Tank 5. Recoil Starter 12. PTO Shaft 6. Oil Cap / Dipstick 13. Oil Filter 7. Oil Drain Plug Note: L48N standard engines are not equipped with covers. L70N and L100N engines are represented in this manual. L-N Operation Manual...

  • Page 27: Location Of Labels

    PRODUCT OVERVIEW LOCATION OF LABELS Figure 2 shows the location of regulatory and safety labels on Yanmar L-N Series engines. 0001126C-01 Figure 2 Typical location of the engine nameplate is shown Engine Nameplate (Typical) (Figure 2, (1)). 0001585-02 L-N Operation Manual...

  • Page 28: Function Of Major Engine Components

    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.

  • Page 29: Air Cooled Engine

    PRODUCT OVERVIEW AIR COOLED ENGINE Decompression Lever The decompression lever (Figure 4, (1)) helps The L-N engine is air-cooled by means of a you start the engine by reducing the effort cooling fan. The cooling system consists of a fan needed to pull the recoil starter handle.

  • Page 30: Indicators

    CAUTION ON (Figure 5, (3)) - This is the position the key For maximum engine life, Yanmar will be in when the engine is running. When the recommends that when shutting the engine is not running, use this position to...

  • Page 31: Inlet Air Heater

    Figure 6 the safety and performance of the machine and shorten its life. If adjustment is ever required, contact your authorized Yanmar industrial engine dealer or distributor. 0000045en Several types of engine speed controls are used in L-N engine applications. This illustration shows a typical example.
  • Page 32 PRODUCT OVERVIEW This Page Intentionally Left Blank L-N Operation Manual...

  • Page 33: Before You Operate

    • Fill the fuel tank and store fuel in a and maintenance techniques. well-ventilated area only. • See your authorized Yanmar industrial • Failure to comply will result in death or engine dealer or distributor for serious injury.
  • Page 34 • NEVER check for a fuel leak with your hands. ALWAYS use a piece of wood or cardboard. Have your authorized Yanmar industrial engine dealer or distributor repair the damage. • Failure to comply could result in death or serious injury.
  • Page 35 BEFORE YOU OPERATE CAUTION WARNING • Only use diesel fuels recommended by Yanmar for the best engine performance, to prevent engine damage. • Only use clean diesel fuel. BURN HAZARD! • NEVER remove inlet fuel screen from • Keep your hands and other body parts the filler port.

  • Page 36: Diesel Fuel

    China diesel fuels. Additional Technical Fuel Requirements Yanmar approves the use of bio-diesel fuels that do not exceed a blend of 5% (by volume) of • The fuel cetane number should be equal to 45 FAME with 95% (by volume) of approved mineral or higher.

  • Page 37: Filling The Fuel Tank

    • NEVER overfill the fuel tank. the warranty coverage of your engine. See • Fill the fuel tank and store fuel in a Yanmar Limited Warranty on page vii. well-ventilated area only. • Failure to comply will result in death or serious injury.
  • Page 38 • Failure to comply will result in death or CAUTION serious injury. • Only use diesel fuels recommended by 0000014en Yanmar for the best engine performance, to prevent engine damage. • Only use clean diesel fuel. • NEVER remove inlet fuel screen from the filler port.

  • Page 39: Engine Oil

    BEFORE YOU OPERATE 1. Clean the area around the fuel cap ENGINE OIL (Figure 1, (1)). 2. Remove the fuel cap (Figure 1, (1)) from the CAUTION fuel tank (Figure 1, (3)). • Only use the engine oil specified. 3. Stop fueling when the fuel is at the same level Other engine oils may affect warranty as the red ring (Figure 1, (4)) at the bottom of coverage, cause internal engine...

  • Page 40: Engine Oil Viscosity

    3. Select the oil viscosity based on the ambient temperature where the engine is being operated. See SAE Service Grade Viscosity Chart (Figure 2). 4. Yanmar does not recommend the use of engine oil “additives.” Additional Technical Engine oil Requirements: The engine oil must be changed when the Total Base Number (TBN) has been reduced to 2.0.

  • Page 41: Engine Oil Capacity (Typical)

    Engine Oil Capacity (Typical) DAILY CHECKS The following are the engine oil capacities for Before you begin any job, make sure the Yanmar various Yanmar L-N Series engines. L-N Series engine is in good operating condition. Make sure you check the following items before...

  • Page 42: Check Diesel Fuel And Engine Oil

    BEFORE YOU OPERATE 2. Check engine speed control for proper CAUTION adjustments. If any problem is noted during the visual Check Indicators check, the necessary corrective action should be taken before you operate the If your engine has an electric starter, check the engine.

  • Page 43: Engine Operation

    0000003en operating 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 L-N Operation Manual...
  • Page 44 ENGINE OPERATION DANGER DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Only use the key switch to start the • Diesel fuel is extremely flammable and engine. explosive under certain conditions. • NEVER jump start the engine. Sparks •...
  • Page 45 ENGINE OPERATION DANGER DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and • Diesel fuel is extremely flammable and explosive under certain conditions. explosive under certain conditions. • Before you operate the engine, check •...
  • Page 46 ENGINE OPERATION WARNING WARNING EXHAUST HAZARD! SEVER HAZARD! • NEVER operate the engine in an • Keep hands and other body parts enclosed area such as a garage, away from moving / rotating parts tunnel, underground room, manhole or such as the cooling fan / flywheel. ship’s hold without proper ventilation.
  • Page 47 0000009en • During the break-in period, check the CAUTION engine oil levels frequently. For maximum engine life, Yanmar 0000011en recommends that when shutting the engine down, you allow the engine to CAUTION idle, without load, for 5 minutes. This...
  • Page 48 0000003en distributor if the engine will be operated in either temperature extreme. • Contact your authorized Yanmar industrial engine dealer or distributor if you need to operate the engine at high altitudes. At high altitudes the engine will lose power, run rough, and produce exhaust gases that exceed the design specifications.

  • Page 49: Starting The Engine

    ENGINE OPERATION STARTING THE ENGINE Recoil Start CAUTION NEVER use an engine starting aid such as ether. Engine damage will result. 0000009en Use the following procedure to start the engine. 0001354A Daily Checks Figure 2 1. Make sure you follow the procedures stated in Daily Checks on page 29.
  • Page 50 ENGINE OPERATION 4. Push the decompression lever (Figure 8, (1)) down and release it. The decompression lever will automatically return to the original ( 1 ) ( 2 ) position when the engine starts. Some L-N model engines have an automatic, internal compression release mechanism and do not ( 4 ) have the external compression release lever.

  • Page 51: Electric Start

    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)).
  • Page 52 ENGINE OPERATION Set Engine Speed Control to START 3. If your engine speed control is similar to Figure 12: Several types of engine speed controls (a) Turn the engine speed control knob are used in L-N engine applications. The (Figure 12, (1)) to the left (Figure 12, (2)). following procedures are for three typical (b) Slide the engine speed control knob to the applications.

  • Page 53: Check The Engine During Operation

    ENGINE OPERATION 2. Turn the key clockwise to the START position CHECK THE ENGINE DURING (Figure 13, (1)). Release the key as soon as OPERATION the engine starts. It will return to the ON position (Figure 13, (2)). CAUTION 3. If the engine fails to start: Make sure the engine is installed on a (a) Wait until the engine comes to a complete level surface.
  • Page 54 Black exhaust smoke could mean the repairs performed. engine is overloaded or being over-fueled. If either of these conditions persists, contact your authorized Yanmar industrial engine WARNING dealer or distributor. 5. Check the fuel level during operation. If the fuel level runs low, stop the engine and refuel.

  • Page 55: Adjust Engine Speed

    ENGINE OPERATION ADJUST ENGINE SPEED 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 0001354B gauges.

  • Page 56: Shutting Down The Engine

    (a) Turn the engine speed control knob CAUTION (Figure 16, (1)) to the left (Figure 16, (2)). For maximum engine life, Yanmar (b) Slide the engine speed control knob in the recommends that when shutting the direction shown to adjust the engine engine down, you allow the engine to speed.

  • Page 57: Electric Start Models

    ENGINE OPERATION 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.

  • Page 58: After The Engine Stops

    ENGINE OPERATION After The Engine Stops 1. Move the fuel cock lever to the closed position (Figure 21, (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).

  • Page 59: Periodic Maintenance

    0000007en • 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 L-N Operation Manual...

  • Page 60: Periodic Maintenance

    PERIODIC MAINTENANCE DANGER DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and • Diesel fuel is extremely flammable and explosive under certain conditions. explosive under certain conditions. • Before you operate the engine, check •...
  • Page 61 PERIODIC MAINTENANCE DANGER DANGER FIRE AND EXPLOSION HAZARD! FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and • Diesel fuel is extremely flammable and explosive under certain conditions. explosive under certain conditions. • NEVER remove the fuel cap with the •...
  • Page 62 PERIODIC MAINTENANCE WARNING WARNING EXHAUST HAZARD! SEVER HAZARD! • NEVER operate the engine in an • Keep hands and other body parts enclosed area such as a garage, away from moving / rotating parts tunnel, underground room, manhole or such as the cooling fan / flywheel. ship’s hold without proper ventilation.
  • Page 63 ALWAYS use a piece of wood parts such as a cooling fan, flywheel, or cardboard. Have your authorized or PTO shaft. Yanmar industrial engine dealer or • NEVER operate the engine while distributor repair the damage. wearing a headset to listen to music or •...
  • Page 64 PERIODIC MAINTENANCE WARNING WARNING BURN HAZARD! SHOCK HAZARD! • If you must drain the engine oil while it • Turn off the battery switch (if is still hot, stay clear of the hot engine equipped) or disconnect the negative oil to avoid being scalded. Make sure battery cable before servicing the you wear eye protection.
  • Page 65 Any alterations to this causing it to clog. engine may affect the warranty 0000004enLV coverage of your engine. See Yanmar Limited Warranty on page 1. CAUTION 0000044enLVOM • Only use the engine oil specified.
  • Page 66 PERIODIC MAINTENANCE CAUTION CAUTION Observe the following environmental For maximum engine life, Yanmar operating conditions to maintain engine recommends that when shutting the performance and avoid premature engine down, you allow the engine to engine wear: idle, without load, for 5 minutes. This will allow the engine components that •...
  • Page 67 See Yanmar Limited Warranty on page 1. Consult your authorized Yanmar industrial engine dealer or distributor for assistance when checking items marked...
  • Page 68 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...

  • Page 69: Precautions

    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 EXHAUST HAZARD! Yanmar parts when replacement parts are needed. Genuine replacement parts help ensure •...

  • Page 70: Tightening Fasteners

    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.

  • Page 71: Periodic Maintenance Schedule

    See Yanmar Limited Warranty on page 1. Consult your authorized Yanmar industrial engine dealer or distributor for assistance when checking items marked...
  • Page 72 PERIODIC MAINTENANCE : Check : Replace : Contact your authorized Yanmar industrial engine dealer or distributor for these maintenance services. Periodic Maintenance Interval Every Every Every System Check Item Daily Every 50 Every 200 Every 400 1000 1500 2000 hours...

  • Page 73: Periodic Maintenance Procedures

    PERIODIC MAINTENANCE PERIODIC MAINTENANCE WARNING PROCEDURES Daily, Before Operation Perform the following maintenance daily before BURN HAZARD! operation. • Batteries contain sulfuric acid. NEVER • Check Battery (If Equipped) allow battery fluid to come in contact with clothing, skin or eyes. Severe •...
  • Page 74 CAUTION battery. • If the engine still will not start after charging, have your authorized Yanmar industrial engine dealer or distributor check the battery and the engine’s starting system. If operating the machine where the ambient Be environmentally responsible.
  • Page 75 A clogged spark arrestor hinders exhaust gas flow oil leaks. If you discover an engine oil leak see your which reduces engine output, increases fuel authorized Yanmar industrial engine dealer or consumption, and makes starting difficult. Clean distributor to repair the engine.
  • Page 76 PERIODIC MAINTENANCE 2. Clean any carbon deposits from the spark DANGER arrestor. 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 •...
  • Page 77 ALWAYS use a piece of wood first. or cardboard. Have your authorized • Failure to comply will result in death or Yanmar industrial engine dealer or serious injury. distributor repair the damage. 0000015en • Failure to comply could result in death or serious injury.

  • Page 78: Daily, After Operation

    • Failure to comply could result in death leaks. NEVER use your hands! If you discover a or serious injury. fuel leak see your authorized Yanmar industrial engine dealer or distributor to repair the engine. 0000015en After you shut down the engine check for any engine oil leaks.
  • Page 79 After you shut down the engine check for any fuel 0000008en leaks. NEVER use your hands! If you discover a fuel leak see your authorized Yanmar industrial WARNING engine dealer or distributor to repair the engine. BURN HAZARD! •...

  • Page 80: After Initial 50 Hours Of Operation

    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 Be environmentally responsible. Follow these procedures for hazardous waste Replace Engine Oil disposal.
  • Page 81 6. Install and tighten the oil filter retaining bolt (Figure 4, (1)). Applicable Engine Oil Filter Part No. L48N, L70N and L100N 114299-35110 7. Add new engine oil to the engine as specified in Adding Engine Oil on page 28.

  • Page 82: Every 50 Hours Of Operation

    PERIODIC MAINTENANCE Every 50 Hours of Operation Perform the following maintenance every 50 hours of operation. • Clean Inlet Fuel Screen Clean Inlet Fuel Screen DANGER FIRE AND EXPLOSION HAZARD! • Diesel fuel is extremely flammable and explosive under certain conditions. •...

  • Page 83: Every 200 Hours Of Operation

    6. Replace the fuel cap (Figure 6, (1)) and hand tighten. Overtightening the fuel cap will damage it. Applicable Inlet Fuel Screen Part No. FLYING OBJECT HAZARD! L48N, L70N and L100N 114250-55100 • ALWAYS wear eye protection when servicing the engine and when using compressed air or high-pressure water.
  • Page 84 6. If either element is damaged replace both of them (they are not sold individually). Applicable Air Cleaner Element Part No. L48N 114250-12581 L70N and L100N 114210-12590 7. Clean the inside of the air cleaner cover (Figure 7, (2)).
  • Page 85 PERIODIC MAINTENANCE Drain the Fuel Tank and Replace CAUTION Outlet Fuel Filter DANGER Be environmentally responsible. Follow these procedures for hazardous waste FIRE AND EXPLOSION HAZARD! disposal. Failure to follow these • Diesel fuel is extremely flammable and procedures may seriously harm the explosive under certain conditions.
  • Page 86 (Figure 8, (2)) and gasket (Figure 8, (3)) to tank filler port (Figure 9, (6)) and seat in the drain the fuel. fuel tank. Applicable Outlet Fuel Filter Part No. L48N, L70N and L100N 114250-55121 Applicable O-Ring Part No. L48N, L70N and L100N 24341-000150 8.

  • Page 87: Every 400 Hours Of Operation

    • NEVER check for a fuel leak with your hands. ALWAYS use a piece of wood or cardboard. Have your authorized Yanmar industrial engine dealer or distributor repair the damage. • Failure to comply could result in death or serious injury.

  • Page 88: Every 1000 Hours Of Operation

    Proper operation of the fuel injectors is required to obtain the optimum injection pattern for full engine performance. The injectors should be inspected, cleaned and tested every 1500 hours. See your authorized Yanmar industrial engine dealer or distributor for this service. L-N Operation Manual...

  • Page 89: Every 2000 Hours Of Operation

    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. L-N Operation Manual...
  • Page 90 PERIODIC MAINTENANCE This Page Intentionally Left Blank L-N Operation Manual...

  • Page 91: Troubleshooting

    If any indicator illuminates during the key switch is in the ON position, see engine operation stop the engine your authorized Yanmar industrial immediately. Determine the cause and engine dealer or distributor for service repair the problem before you continue before operating the engine.
  • Page 92 REFER TO Indicator Stays On - Key Switch is Turned from Start to ON (START → ON) • Battery indicator stays On • Faulty alternator • See authorized Yanmar — industrial engine dealer or • Engine oil pressure indicator • Faulty engine oil pressure —...

  • Page 93: Troubleshooting Information

    TROUBLESHOOTING INFORMATION If your engine does not operate properly, refer to the troubleshooting chart or consult your authorized Yanmar industrial engine dealer or distributor. Supply the authorized Yanmar industrial engine dealer or distributor with the following information: • Model name and serial number of your engine •...
  • Page 94 TROUBLESHOOTING This Page Intentionally Left Blank L-N Operation Manual...

  • Page 95: Long Term Storage

    LONG TERM STORAGE L-N Operation Manual This section of the Operation Manual describes WARNING 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 BURN HAZARD! ENGINE IN LONG TERM •...
  • Page 96 LONG TERM STORAGE 4. Recoil start engines: 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. (b) Pull the decompression lever up. Pull the recoil starter slowly and stop when there is resistance.

  • Page 97: Returning The Engine To Service

    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.
  • Page 98 LONG TERM STORAGE This Page Intentionally Left Blank L-N Operation Manual...

  • Page 99: Specifications

    SPECIFICATIONS L-N Operation Manual GENERAL Description of Model Number 9 10 11 L 4 8 L 7 0 L 1 0 0 Remarks (Big Oilpan, Special Specifications, etc.) Fan Case FO Tank and FO Pump Muffler Speed Control Device Air Cleaner Starting Motor + Recoil PTO + Flange Emission Controlled or Not...

  • Page 100: Engine General Specifications

    • Atmospheric Condition: Room temperature 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...

  • Page 101: Principal Engine Specifications

    SPECIFICATIONS PRINCIPAL ENGINE SPECIFICATIONS Engine Specifications Engine Model L48N L70N L100N Type 4-stroke, Vertical Cylinder, Air-Cooled Diesel Engine No. of Cylinders Bore × Stroke 70 × 57 mm 78 × 67 mm 86 × 75 mm Displacement 0.219 L 0.320 L 0.435 L...
  • Page 102 SPECIFICATIONS This Page Intentionally Left Blank L-N Operation Manual...
  • Page 103 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.yanmar.co.jp/yasc/...
  • Page 104 0ALN0-G00100 PRINTED IN JAPAN...

This manual is also suitable for:

L70nL100n

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