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Yanmar 4LHA-STZP User Manual

Yanmar 4LHA-STZP
670 pages
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IMPORTANT NOTE:
REMEMBER ALWAYS TO CONNECT
FORWARD
PAINTER
LINE
TO MOTHER
VESSEL,
BEFORE
LAUNCHING THE BOAT.
WHEN YOU ORDER SPARE PARTS,
OR HAVE
ANY
QUESTIONS,
PLEASE
CONTACT:
Supplier:
MARITIME
PARTNER
Postboks
776, Sentrum
6001
AALESUND, NORWAY
Telefon:
+47 70
11
65 65 Telefax: +47 70
11
65 55
E-mail:
office@maritime-partner.com
www.maritime-partner.com

Table of Contents

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Yanmar 4LHA-STZP Specifications

General IconGeneral
Engine Model4LHA-STZP
Number of Cylinders4
Fuel TypeDiesel
Combustion SystemDirect Injection
Starting SystemElectric
AspirationTurbocharged
Cooling SystemFreshwater
Alternator12V, 80A
Engine Type4-cycle, water-cooled diesel
Maximum Torque206 Nm (21 kgf·m) at 1, 800 rpm
Max. Torque206 Nm (21 kgf·m) at 1, 800 rpm
Lubrication SystemForced lubrication by trochoid pump

Summary

Chapter 0 For Safety

1. For Safe Servicing

Essential safety rules and precautions to prevent accidents during repair or maintenance.

2. Precautions for Safe Servicing

Detailed safety guidelines for the service shop, working wear, tools, parts, and electrical safety.

3. Location of Product Safety Labels

Identifies the location of warning labels attached to the product for safety.

Chapter 1 General

1. Exterior Views

Illustrates the external components of the engine from different angles.

2. Specifications

Provides detailed technical specifications for various engine models.

3. Service Standards

Details essential service standards, including tightening torques for nuts and bolts.

4. Performance Curve

Presents graphical data showing engine performance characteristics at different speeds.

6. Piping Diagrams

Illustrates the routing and connections of various piping systems within the engine.

7. Electrical Diagrams

Shows the wiring diagrams for different control panel types and system components.

Chapter 2 Basic Engine

1. Disassembly and Reassembly Tools

Lists and illustrates the tools required for engine disassembly and reassembly.

2. Cylinder Block

Describes the construction of the cylinder block and inspection procedures for cracks and oil holes.

3. Cylinder Liners

Details the measurement and insertion procedures for cylinder liners.

4. Cylinder Head

Explains the construction and inspection of the cylinder head, including valve seats and guides.

5. Piston and Piston Pins

Covers the construction, measurement, and replacement of pistons and piston pins.

6. Connecting Rod

Details the inspection and assembly procedures for the connecting rod.

7. Crankshaft and Main Bearing

Describes the construction and inspection of the crankshaft and main bearings.

8. Camshaft and Tappets

Explains the construction and inspection of the camshaft and tappets.

9. Timing Gear

Covers the inspection of timing gears and their backlash.

10. Flywheel

Provides dimensions for the flywheel and flywheel housing.

Chapter 3 Fuel Injection Equipment

3-1. Distributor Type

Details the fuel supply system, injection pump, governor, and related components.

3-2. YPES-AL Type

Covers fuel supply system, governor, pump, and troubleshooting for YPES-AL models.

4. Fuel System

Illustrates and explains the construction and operation of the fuel system.

5. Injection Pump Construction and Operation

Explains the construction and operation of the VE type injection pump, including fuel delivery and speed governing.

6. Governing Mechanism

Details the construction and operation of variable speed, combination, and negative torque governors.

7. Timer Construction and Operation

Explains the construction and operation of speed, servo valve, and load timers.

8. Magnet Valve

Describes the construction and operation of the magnet valve.

9. Pump Reassembly, Adjustment and Inspection

Provides procedures for reassembling, adjusting, and inspecting the fuel injection pump and governor.

10. Fuel Injection Pump Specifications

Lists specifications for the fuel injection pump and its components.

11. Troubleshooting

Provides a guide to diagnosing and resolving common engine and fuel system malfunctions.

12. Fuel Injection Nozzle

Details the construction, functioning, disassembly, and inspection of fuel injection nozzles.

13. Fuel Filter

Explains the construction and maintenance of the fuel filter.

Chapter 4 Intake and Exhaust System

1. Intake and Exhaust System

Describes the air intake and exhaust system, including cooling and gas flow.

2. Intake Silencer

Explains the construction and inspection of the intake silencer.

3. Intake Manifold

Details the inspection procedures for the intake manifold.

4. Turbocharger

Covers turbocharger construction, function, specifications, and troubleshooting.

5. Mixing Elbow

Describes the inspection of the mixing elbow for dirt, scale, and damage.

6. Breather

Explains the construction and inspection of the breather system.

Chapter 5 Lubrication System

1. Lubrication System

Provides an overview of the engine's lube oil flow and system components.

2. Lube Oil Pump

Details the construction, specifications, disassembly, and inspection of the lube oil pump.

3. Lube Oil Filter

Explains the construction and replacement procedure for the lube oil filter.

4. Oil Pressure Control Valve

Describes the construction and replacement of the oil pressure control valve.

5. Lube Oil Cooler

Provides specifications and inspection procedures for the lube oil cooler.

6. Piston Cooling Nozzle

Details the construction and inspection of the piston cooling nozzle.

7. Rotary Waste Oil Pump (Optional)

Describes the optional rotary waste oil pump for oil changes.

Chapter 6 Cooling Water System

1. Cooling Water System

Explains the indirect sea water coded, fresh water circulation cooling system.

2. Sea Water Pump

Details the construction, specifications, disassembly, inspection, and reassembly of the sea water pump.

3. Fresh Water Pump

Describes the construction, specifications, disassembly, inspection, and reassembly of the fresh water pump.

4. Heat Exchanger

Covers the construction, specifications, disassembly, and inspection of the heat exchanger.

5. Pressure Cap and Sub Tank

Explains the construction, inspection, and precautions for the pressure cap and sub tank.

6. Thermostat

Details the functioning, construction, characteristics, inspection, and testing of the thermostat.

7. Kingston Cock (Optional)

Describes the construction, inspection, and handling precautions for the optional Kingston cock.

8. Sea Water Filter (Optional)

Explains the purpose and inspection of the optional sea water filter.

9. Bilge Pump and Bilge Strainer (Optional)

Provides specifications and performance data for the optional bilge pump and strainer.

Chapter 7 Reduction and Reversing Gear

7-1. Marine Gear Model KM5A

Details the construction and specifications of the KM5A marine gear.

2. Shifting Device

Explains the construction, operation, adjustment, and inspection of the shifting device.

3. Inspection and Servicing

Covers inspection and servicing procedures for the clutch, gears, drive cone, and shafts.

4. Disassembly

Provides step-by-step instructions for disassembling the marine gear components.

5. Reassembly

Details the procedures for reassembling the marine gear components.

Chapter 9 Electrical System

1. System Diagram

Illustrates the system diagram of electric parts for B2, C, D, and E types.

2. Battery

Covers battery construction, capacity, inspection, and charging precautions.

3. Starter Motor

Details the starter motor's specifications, features, construction, disassembly, and testing.

4. Alternator

Explains the alternator's functioning, specifications, features, inspection, and troubleshooting.

5. Instrument Panel

Illustrates the B, C, D, and E type instrument panels.

6. Warning Devices

Describes the oil pressure alarm and cooling water temperature alarm systems.

7. Tachometer

Covers the construction, specifications, and troubleshooting of the tachometer.

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