OPERATION MANUALBe sure to read this manuaI for safe and proper operation. Store this manual carefully after use.
_9_2. EXPLANATION OF PRODUCTIn the case of 4LHA-HTP/-DTP/-STPengines with marine gear(HSW450A2, HSW630A1),con-nect the propeller shaft to the marine g
_10_2.2 Engine SpecificationsEngine model 4LHA-HTPType Vertical water cooled 4-cycle diesel engineNo. of clinders 4Bore × Stroke mm 100×110Displaceme
_11_●4LHA-DTP/-DTZPEngine model 4LHA-DTPType Vertical water cooled 4-cycle diesel engineNo. of clinders 4Bore × Stroke mm 100×110Displacement 3.455Fue
_12_●4LHA-STP/-STZPEngine model 4LHA-STPType Vertical water cooled 4-cycle diesel engineNo. of clinders 4Bore × Stroke mm 100×110Displacement 3.455Fue
_13_Inter CoolerTurbochargerAlternatorFuel injection pump Lube oil filter Fuel oil filter Fuel injection valve Lube oil Cooler[Note] This illustrati
_14_[Note] This illustration shows the 4LHA-DTP engine.
_15_AlternatorTurbochargerFuel injection pump Lube oil filter Inter CoolerFuel oil filter Fuel injection valve Lube oil CoolerStern driving devices
_16_2.4 Major Servicing PartsName of Part Function●Fuel filterRemoves dust and water from fuel. The filter is a cartridge type, and the fuel element
_17_The control equipment consists of the control panel and remote control handle, which areconnected by the wires and cables to the control levers fo
Congratulations on your choice of YANMAR product from YANMAR DIESEL ENGINE CO., LTD.This manual describes operation, periodic inspection andmaintena
_18_●●New C-typeGLOWOFFONSTARTSETOFFBUZZER STOPILLUML ON00x100/mi nENGINE HOURS01020304050100BATTERYCHARGEC.WATER TEMPLUB.OIL PRESS.C.WATER LEVE
_19_(1) Gauges and EquipmentGauges & Equipment FunctionsStarter switchOFF: The switch key can be inserted or removed. All power is turned off. ON:
_20_(2) Functions of Alarm Devices (Alarm Buzzer & Lamps)1) The alarm buzzer sounds when any warning lamp (except the charge lamp) comes on.2) War
Function of Alarm DevicesAlarm Buzzer On OffAlarm LampsCharge Lamp On OffCooling Water Temperature Off OffEngine Oil Pressure On OffFuel filter Off O
_22_●●Starting and stoppingPut the handle in NEUTRAL. This puts theclutch in the disengage position (stop) andidles the engine at a low speed.●●Forwa
_23_3.1.1 Fuel(1) Selection of fuelUse the following diesel fuels for best engine performance:ISO8217 DMA, BS2869 A1 or A2(2) Fuel Handling1) Water a
()_24_3.1.2 Lube oil(1) Selection of Engine Lube OilUse the following lube oil:*API Classification...CD(Standards of America Petroleum In
_25_(1) Handling of Cooling Water1) Always use purified soft water or distilled water for the fresh water. Never use dirty water or hard water.Impuri
_26_3.2.1 Filling the Fuel TankFill the tank with clean fuel which has not been contaminated with water or dust.Fill the tank to approximately 90% o
Lube oil filler cap_27_3.3 Supplying Engine Lube OilFill with the specified amount of engine oil.①Remove the filler cap on the top of the bonnetand
_1_Thank you for purchasing the YANMAR Marine Diesel Engine.[INTRODUCTION]●This Operation Manual describes the operation, maintenance and inspectionof
●Marine gear (HSW450A2, HSW630A1)For the marine gear, follow the maker'sinstructions.●For MERCRUISER'sstern-driven device (BRAVO), supply lu
_29_3.5 Supplying Cooling WaterBurns from Scalding●Never remove the filler cap of the fresh water cooler while the engine is still hot. Steam and ho
_30_⑥Check the rubber hose connecting the subtankto with the fresh water tank. If the hose is notwater-tight a lot of coolling water will be con-sume
_31_3.7 Checking the Lube Oil and Cooling WaterWhen lube oil, gear oil, and cooling water are put in for the first time, or after they have been repl
_32_4. HOW TO OPERATEExhaust Gas Poisoning●Be sure to establish good ventilation in the engine room with windows,vents, or other ventilation equipmen
_33_(4) Checking and Resupplying Marine drive Oil①Refer to the instructions accompanying the marine drive for the amount of lube oil.②Supply with the
4.2 Checking the Control Panel and Alarm Devices_34_Be sure to check the alarm devices and other instruments on the panel before and after startingth
_35_4.3.3 Restarting After Starting FailureWhen attempting to restart the engine after starting failure, be sure that the engine is at a completestop
_36_For a new engine be especially carefulnot to change speeds abruptly or attacha heavy load for the first 50 hours ofoperation. Doing so will resul
_37_Always be on the look out for problems during engine operation. Pay particular attention to the following.(1) Is sufficient water being discharged
_2_INDEXpage No.INTRODUCTION...
_38_Stopping the engine suddenly afteroperating at high speed without cool-ing it down will cause the engine tem-perature to rise quickly resulting in
_39_4.8 Operation ProcedureThe following diagram shows the procedures for operation explained up to this point.Parts of the operation may differ dep
_40_Drain the water from both the seawater andfresh water systems. Draining the water from the seawater system①Open the water drain cock on the seawa
_41_ Draining the water from the cooling fresh water systemIf antifreeze has not been added to the fresh cooling water, be sure to drain the water fro
_42_Conduct Periodic Inspection for Your Safety.The functions of engine components will degenerate and engine performance will fallaccording to the us
_43_5.1 List of Periodic InspectionsDaily and periodic inspection are important to keep the engine in its best condition. The followingis a summary
_44_During initial operation of the engine, the oil is quickly contaminated due to the initial wear ofinternal parts. The lube oil must therefore be
_45_5.2.2 Inspection Every 50 Hours(1) Draining the Fuel Tank (local supply)①Put a pan under the drain to catch the fuel. ②Loosen the drain cock at
_46_(3) Drain the fuel filterWhen water and dirt are mixed in with the fuel, it becomes impossible for the fuel injection pumpand the valve to work.
_47_●Check the level of fluid in the battery. When the amount of fluid nears the lower limit, fillwith battery fluid (available in the market) to the
_3_5. MAINTENANCE & INSPECTION...42~545.1 List of Periodic In
(1) Replacing the Fuel Filter1) 4LHA-HTP/-HTZP①Close the fuel cock of the fuel tank.②Drain the fuel from the fuel drain cock at the bottom of fuel fil
(2) Replacing Engine Lube Oil and Lube Oil filter. (See 5.2.1(1))(3) Replacing Cooling Fresh Water Cooling performance drops when the cooling water i
_50_(5) Adjusting the Remote Contorol Cable1) Adjusting the engine speed control cableCheck the governor lever (speed controllever) at the engine side
_51_Do not pour in a large amount ofblower wash at one time (pour it ingradually) as this can damage theblower blades and get waterhammer in
_52_5.2.4 Inspection Every 500 Hrs.or 2 yrs.(1) Checking the Tension of the V-Belt of the AlternatorWhen there is not enough tension in the V-belt,th
_53_(3) Inspecting Inner Parts of the Seawater PumpThe discharge performance of the seawaterpump falls depending on the use. The seawater pump must be
_54_(2) Lapping of Intake/Exhaust ValvesAdjustment necessary to maintain proper contact of valves and seats.This maintenance requires specialized know
_55_Trouble ●Alarm buzzersounds and alarmlamps go onduring operation○Eng. L.O. Press. Engine L.O. insufficient; L.O. level check,Warning Lamp L.O. fil
_56_○Charge lamp does V-belt broken or loose Replace V-belt; adjust 5.2.4(1)not go out tensionduring operation Battery defective. Check fluid level,sp
_57_7.1 Piping diagram7. SYSTEM DIAGRAMS●4LHA-HTP32φ3313φ8φ10260PPPTPabcdPINTER COOLEROIL PRESSURELUB. OIL FILTEROIL PUMPSAFETY VALVEFROM WATER HEAT
_4_1. FOR SAFE OPERATION1.1 Warning SymbolsThese are the warning signs which are used in this manual and on the products.Pay special attention to the
_58_●4LHA-HTZPA32φ3313φ8φ10260NAMEMARKS OF PIPING(UNION)SCREW JOINTFLANGE JOINTEYE JOINTINSERTION JOINTDRILL HOLECOOLING FRESHWATER PIPINGCOOLING SEAW
_59_●4LHA-DTP/-STP COOLING FRESH WATER PUMP OIL PUMP (SUB) COOLING SEA WATER PUMP COOLING SEA WATER INLET CAMSHAFT BEARING OIL PUMP FUEL OVE
_60_●4LHA-DTZP/-STZPA32φ3313φ8φ10260NAMEMARKS OF PIPING(UNION)SCREW JOINTFLANGE JOINTEYE JOINTINSERTION JOINTDRILL HOLECOOLING FRESHWATER PIPINGCOOLIN
_61_7.2 Wiring diagram(1) New B-type Control panelTacho withHour meterBuzzerBuzzer stop IllumiRGBZWGGrBGRWLYWGrBYRGROGRGEng. Oil P.C.W. Temp.Exhaust
_62_(2) New C-type Control panel3R3L2WYWWL WGBRBLB OYGYRYWB WRYB GBGGR Details of coupler-AGYBR BRBGW BW Details of coupler-C (4LHA-HTP/-HTZP
_63_(3) New D-type Control panel3R3L2WYWWL WGBRBLB OYGYRYWB WRYB GBGGR Details of coupler-AGYBR BRBGW BW Details of coupler-C (4LHA-HTP/-HTZP
_64_WARRANTY SERVICEOwner SatisfactionYour satisfaction and good will are important to your dealer and to us.Normally, any problems conceming the prod
49961-205431YA N MAR DIESEL AMERICA CORP.951 CORPORATE GROVE DRIVE, BUFFALO GROVE, IL 60089-4508, U.S.A.TEL : 1-847-541-1900FAX : 1-847-541-21
_5_1.2 Safety PrecautionsBurns from Scalding● Never remove the filler cap of the fresh water cooler while the engine is still hot. Steam and hot wat
_6_Disposal of waste materials●Put oil or liquids to be disposed in a container. Never dispose of waste oil or other fluids outside, in a sewer, rive
_7_To insure safe operation, warning device labelshave been attached. Their location is shown inthe diagram below and next page. Keep the labelsfr
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