Mitsubishi S12A2 Diesel Engine Service Manual PDF

This service manual describes the maintenance and adjustment procedures, and specifications for the Mitsubishi marine engine S12A2.
To maintain the performance of the engine for many years and to ensure safe operation, it is important to use the engine correctly and conduct scheduled inspection and maintenance, and it may also be necessary to take appropriate measures which involve in disassembly, inspection, repair and assembly work of the engine and engine parts.
This service manual consists of several chapters, which will give you quick references to specifications, maintenance standards, adjustment and service procedures including practices to disassemble, inspect, repair and assemble the Mitsubishi marine engines.
This service guide comes in PDF format. We recommend using Adobe PDF Reader, to be sure all images/graphics will display correctly.

GENERAL CONTENTS:

• Chapter 1 GENERAL
  •     1. External View
  •     2. Outline of Systems
  •     3. Contents of Plate and Label
  •     4. Specifications
• Chapter 2 SERVICE DATA
  •     1. Maintenance Service Data
  •     2. Tightening Torque Table
• Chapter 3 SERVICE TOOLS
  •     1. Special Tools
• Chapter 4 OVERHAUL INSTRUCTIONS
  •     1. Determining Overhaul Timing
  •     2. Compression Pressure - Measure
• Chapter 5 DISASSEMBLY OF BASIC ENGINE
  •     1. Cylinder Heads and Valve Mechanisms - Disassemble and Inspect
  •     2. Rear Mechanism - Disassemble and Inspect
  •     3. Front Mechanism - Disassemble and Inspect
  •     4. Cylinder Liner, Piston, and Connecting Rod - Disassemble and Inspect
  •     5. Crankcase, Crankshaft, and Main Bearing - Disassemble and Inspect
• Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE
  •     1. Cylinder Head and Valve Mechanism - Inspect and Repair
  •     2. Rear Mechanism - Inspect and Repair
  •     3. Front Mechanism - Inspect and Repair
  •     4. Piston and Connecting Rod - Inspect and Repair
  •     5. Crankcase and Crankshaft - Inspect and Repair
• Chapter 7 ASSEMBLY OF BASIC ENGINE
  •     1. Crankshaft and Main Bearing - Install
  •     2. Cylinder Liner, Piston and Connecting Rod - Assemble
  •     3. Front Mechanism - Assemble
  •     4. Rear Mechanism - Assemble
  •     5. Cylinder Head and Valve Mechanism - Assemble
• Chapter 8 FUEL SYSTEM
  •     1. Fuel System - Remove and Inspect
  •     2. Fuel System - Disassemble, Inspect and Assemble
  •     3. Fuel System - Install
• Chapter 9 LUBRICATION SYSTEM
  •     1. Lubrication System - Remove and Inspect
  •     2. Lubrication System - Disassemble, Inspect and Assemble
  •     3. Lubrication System - Install
• Chapter 10 COOLING SYSTEM
  •     1. Cooling System - Remove and Inspect
  •     2. Cooling System - Disassemble, Inspect and Assemble
  •     3. Cooling System - Install
• Chapter 11 INLET AND EXHAUST SYSTEMS
  •     1. Inlet and Exhaust Systems - Remove and Inspect
  •     2. Inlet and Exhaust Systems - Disassemble, Inspect and Assemble
  •     3. Inlet and Exhaust Systems - Install
• Chapter 12 AIR START SYSTEM
  •     1. Air Start System - Remove and Inspect
  •     2. Air Start System - Disassemble, Inspect and Assemble
  •     3. Air Start System - Install
• Chapter 13 ADJUSTMENT AND OPERATION
  •     1. Engine - Adjust
  •     2. Break-in Operation
  •     3. Engine-Test and Adjustment