Yanmar 4BY & 6BY Series Marine Diesel Engine Repair Service Manual
Yanmar 4BY & 6BY Series Marine Diesel Engine Repair Service Manual
- This Workshop Service Repair manual PDF download for the 4BY & 6BY Series Yanmar Marine Diesel Engine has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to fully at every opportunity.
Safety General Service Information Periodic Maintenance Engine Fuel System Cooling System Lubrication Turbocharger Starter Motor Alternator Electrical and ECU Troubleshooting
MANUAL SPECIFICATION :
File Format : PDF Language : English Printable : Yes Searchable : Yes Bookmarked : Yes Part Number : OBBYO-G00102 Total Pages : 233
This Service / Repair / Workshop Manual PDF Download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having completly searcheble PDF files instead of a hard-printed manual is that you can use the Search feature in your PDF reader software (Adobe Acrobat) to find just what your looking for and just print out the exact pages you need or all manual easily. This is the same manual your local dealer will use when doing a repair. This is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!!
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Cover Table of Contents Introduction Revision History Revision Control Table Safety Safety Precautions General Service Information Safety Precautions Engine Outline Drawings 4BY with KMH40A 6BY with KMH40A Engine Piping Diagrams Location of Nameplates Engine Nameplates (Typical) Diesel Fuel Diesel Fuel Specifications Additional Technical Fuel Requirements Diesel Fuel Lines Bleeding the Fuel System Engine Oil Engine Oil Specifications Service Categories Definitions Engine Oil Viscosity Acceptable Engine Oil Recommended Marine Gear or Stern Drive Oil Recommended Power Steering Fluid Engine Coolant Engine Coolant Specifications Engine Coolant Mixture Acceptable Engine Coolant Principal Engine Specifications Tightening Torques for Standard Bolts and Nuts Tightening Fasteners Hexagon Bolts and Nuts Hose Clamps Prepare Engine for Long-Term Storage Abbreviations and Symbols Abbreviations Symbols Unit Conversions Unit Prefixes Units of Length Units of Volume Units of Mass Units of Force Units of Torque Units of Pressure Units of Power Units of Temperature Periodic Maintenance Introduction The Importance of Periodic Maintenance Performing Periodic Maintenance Yanmar Replacement Parts Required EPA Maintenance EPA Requirements Conditions to Ensure Compliance with EPA Emission Standards Inspection and Maintenance Periodic Maintenance Schedule Periodic Maintenance Procedures After Initial 50 Hours of Operation Every 50 Hours of Operation Every 250 Hours of Operation Every 500 Hours of Operation Every 1000 Hours of Operation Every 2000 Hours of Operation Engine Before You Begin Servicing Introduction Specifications General Information Test and Adjustment Specifications Repair Specifications Special Torque Chart Special Service Tools Measuring Instruments Sealants and Compounds Tests and Adjustments Test Compression Repair Cylinder Head Cylinder Head Components General Guidelines Remove and Install Cylinder Head Cover Cylinder Head Cover Components Removal Installation Remove and Install Glow Plugs Remove Cylinder Head Disassemble Cylinder Head Clean Cylinder Head Components Pressure Test the Cylinder Head Inspect Cylinder Head Components Inspection of Valve Guides Replace Valve Stem Seals Assemble Cylinder Head Determine Cylinder Head Gasket Thickness Install Cylinder Head Pistons and Cylinders Remove and Disassemble Piston and Connecting Rod Inspect Pistons and Piston Rings Assemble Piston and Connecting Rod Install Piston and Connecting Rod Flywheel and Flywheel Housing Remove and Install Flywheel Housing Remove and Install Drive Coupling Engines with Marine Gear Engines with Stern Drive Remove Flywheel Replace Rear Crankshaft Seal Install Flywheel Camshaft and Timing Gear Train Components Check and Adjust Camshaft Timing Check Camshaft Timing Adjust Camshaft Timing Remove and Install Vibration Damper - 4BY Remove and Install Vibration Damper - 6BY Remove Timing Case Cover Remove and Install Timing Chain Install Timing Case Cover Remove and Install Timing Chain Tensioner Remove Camshafts Install Camshafts Cylinder Block and Crankshaft Components Remove Crankshaft Measure Oil Clearance Inspect Crankshaft Crankshaft Specifications Inspect Cylinder Block Install Crankshaft Replace Front Crankshaft Seal Intake Manifold Remove Install Exhaust Manifold Remove Install Attach Engine to Repair Stand Fuel System Safety Precautions Introduction Specifications Test and Adjustment Specifications Special Torque Chart Special Service Tools Fuel System Components 4BY Engines 6BY Engines Fuel Flow Diagram Tests and Adjustments Measure Fuel Feed Pump Pressure Procedure Results Test Return Fuel Pressure Results Repair Remove Fuel Injector Clean Fuel Injector Cavities Install Fuel Injector Remove and Install High-Pressure Fuel Lines Replace the Fuel Feed Pump Replace High-Pressure Fuel Pump Removal Installation Replace Fuel Filters Replace Fuel Fine Filter Replace the Fuel Filter / Water Separator Remove and Install Fuel Rail Replace Injector Return Fuel Line Bleed the Fuel System Cooling System Before You Begin Servicing Introduction Specifications Test and Adjustment Specifications Repair Specifications Special Torque Chart Special Service Tools Measuring Instruments Cooling Flow Diagram Tests and Adjustments Pressure Test Cooling System and Filler Cap Cooling System Filler Cap Test Thermostat Repair Drain and Refill Seawater Cooling System Check and Replace Zinc Anodes Drain and Fill Closed Cooling System Disconnect and Connect Quick-Connect Fittings Disconnect Connect Remove and Install Hydraulic Oil Cooler Inspect and Clean Hydraulic Oil Cooler Remove and Install Charge Air Cooler Disassemble and Assemble Charge Air Cooler Remove and Install Heat Exchanger Disassemble and Assemble Heat Exchanger Remove and Install Coolant Pump Remove and Install Thermostat Removal Installation Seawater Pump Inspect / Replace Impeller Remove and Install Seawater Pump Replace Seawater Pump Belt Lubrication Introduction Specifications Test and Adjustment Specifications Special Torque Chart Special Service Tools Measuring instruments Tests and Adjustments Engine Oil Flow Check Engine Oil Pressure Results: Repair Engine Lubrication System Components Change Engine Oil and Replace Engine Oil Filter Element Remove and Install Oil Cooler Remove and Install Oil Filter Housing Remove and Install Oil Sump Oil Pump Remove Oil Pump Install Oil Pump Turbocharger Introduction Specifications Test and Adjustment Specifications Special Torque Chart Special Service Tools Sealants and compounds Tests and Adjustments Measure Charge Pressure Results: Specifications Adjust Charge Pressure - 4BY Repair Remove Turbocharger Install Turbocharger Starter Motor Before You Begin Servicing Introduction Starter Motor Specifications General Specifications Special Torque Chart Starter Motor Troubleshooting Remove and Install Starter Motor Alternator Before You Begin Servicing Introduction Specifications General Specifications Special Torque Chart Repair Replace Alternator Belt Remove and Install Alternator Remove and Install Alternator Belt Tensioner Electrical and ECU Introduction Specifications Special Torque Chart Function Description - Engine Management System Component Locations 4BY 6BY Electrical Panel Components Electrical Panel Connector (X1) Connections Connector X1 Pin Assignments Component Tests Relays Start Relay (K1) Main Relay (K2) Fuel Pump Relay (K3) Oil Pressure Sensor Results of Failed Sensor Test Values Fuel Injector Results of Failed Injector Test Values Engine Coolant Temperature Sensor Results of Failed Sensor Test Values Fuel Rail Pressure Control Valve Results of Failed Valve Test Values Water-in-Fuel Sensor Results of Failed Sensor Test Values Crankshaft Speed Sensor Results of Failed Sensor Glow Plug / Control Unit The System Function Results of Component Failure Test Values Fuel Temperature Sensor Results of Failed Sensor Test Values Fuel Volume Regulator Results of Failed Regulator Test Values Charge Air Temperature Sensor Results of Failed Sensor Test Values Charge Air Pressure Sensor Results of Failed Sensor Test Values Fuel Rail Pressure Sensor Results of Failed Sensor Test Values Camshaft Speed Sensor Results of Failed Sensor Throttle Position Sensor Results of Failed Sensor Test Values Repair Replace Engine Control Unit (ECU) Replace Coolant Temperature Sensor Replace Charge Air Pressure Sensor Replace Charge Air Temperature Sensor Replace Crankshaft Sensor Replace Camshaft Sensor Replace High-Pressure Fuel Control Valve Replace High-Pressure Fuel Sensor Replace Fuel Temperature Sensor Replace Fuel Volume Regulator Replace Oil Pressure Sensor Troubleshooting Introduction Engine Faults and Torque Limitations Torque Limitation for Failed Sensors Mode Torque Limitation for Smoke Limitation Mode Torque Limitation for Overheat Protection Mode Troubleshooting Chart Starting Trouble Exhaust Color Vibration - Drive Disengaged Vibration - Drive Engaged Engine Knocks Low Power Output Engine Overheat Engine Runs Cold Coolant Loss Helm Panel Display Trouble Codes Working Procedure Diagnostic Trouble Codes After Troubleshooting or Repair