Yanmar 3TNV Series Service Manual page 12

4. Disassembly, Inspection and Reassembly of Engines.............................. 59
4.1 Complete disassembly and reassembly ................................................................................ 59
4.1.1 Introduction ............................................................................................................................59
4.1.2 Special service tools...............................................................................................................60
4.1.3 Complete disassembly ...........................................................................................................65
4.1.4 Precautions before and during reassembly ............................................................................69
4.1.5 Adjusting operation.................................................................................................................69
4.2 Cylinder Head: Disassembly, Inspection and Reassembly.................................................... 70
4.2.1 Components (2-valve cylinder head)......................................................................................70
4.2.2 Disassembly procedure:.........................................................................................................70
4.2.3 Reassembly procedure: .........................................................................................................71
4.2.4 Servicing points ......................................................................................................................72
4.2.5 Parts Inspection and measurement........................................................................................76
4.2.6 Valve seat correction ..............................................................................................................80
4.2.7 Valve guide replacement ........................................................................................................81
4.2.8 Valve stem seal replacement..................................................................................................82
4.3 Gear Train and Camshaft ...................................................................................................... 83
4.3.1 Components ...........................................................................................................................83
4.3.2 Disassembly procedure:.........................................................................................................83
4.3.3 Reassembly procedure: .........................................................................................................83
4.3.4 Servicing points ......................................................................................................................84
4.3.5 Parts inspection and measurement ........................................................................................87
4.3.6 Oil seal replacement (Gear case side) ...................................................................................89
4.3.7 Camshaft bushing replacement..............................................................................................89
4.4 Cylinder Block........................................................................................................................ 90
4.4.1 Components ...........................................................................................................................90
4.4.2 Disassembly procedure:.........................................................................................................90
4.4.3 Reassembly procedure: .........................................................................................................90
4.4.4 Servicing points ......................................................................................................................91
4.4.5 Parts inspection and measurement ........................................................................................95
4.4.6 Cylinder bore correction .......................................................................................................106
4.4.7 Piston pin bushing replacement ...........................................................................................107
4.4.8 Oil seal replacement (Flywheel housing side) ......................................................................107