Yanmar 3YM30 Sevice Manual page 6

5.6.1 Camshaft....................................................................................................................................... 128
5.6.2 Tappets ......................................................................................................................................... 130
5.7 Timing gear ..........................................................................................................................131
5.7.1 Inspecting the gears...................................................................................................................... 131
5.7.2 Gear timing marks......................................................................................................................... 131
5.8 Flywheel and housing ..........................................................................................................132
5.8.1 Position of top dead center and fuel injection timing..................................................................... 132
5.8.2 Damper disc.................................................................................................................................. 133
6. Fuel injection equipment .............................................................................................. 134
6.1 Fuel Injection pump/governor ...............................................................................................134
6.1.1 Fuel system diagram..................................................................................................................... 134
6.1.2 Fuel injection pump service data and adjustment......................................................................... 135
6.1.3 Fuel injection pump structure........................................................................................................ 139
6.1.4 Removing a fuel injection pump.................................................................................................... 140
6.1.5 Installing a fuel injection pump...................................................................................................... 140
6.1.6 Adjusting fuel injection timing........................................................................................................ 140
6.1.7 Troubleshooting of fuel injection pump ......................................................................................... 141
6.1.8 Major faults and troubleshooting................................................................................................... 141
6.2 Fuel feed pump ....................................................................................................................144
6.2.1 Construction of fuel feed pump ..................................................................................................... 144
6.2.2 Fuel feed pump specifications ...................................................................................................... 144
6.2.3 Disassembly and reassembly of fuel feed pump .......................................................................... 145
6.2.4 Fuel feed pump inspection............................................................................................................ 145
6.3 Fuel filter ..............................................................................................................................147
6.3.1 Fuel filter specifications................................................................................................................. 147
6.3.2 Fuel filter inspection ...................................................................................................................... 147
6.4 Fuel tank ..............................................................................................................................148
7. Intake and exhaust system .......................................................................................... 149
7.1 Intake system .......................................................................................................................149
7.1.1 Breather system (A reductor to intake air system of blowby gas)................................................. 149
7.1.2 Diaphragm assy inspection........................................................................................................... 150
7.2 Exhaust system ....................................................................................................................151
7.2.1 Construction.................................................................................................................................. 151
7.2.2 Mixing elbow inspection ................................................................................................................ 151
8. Lubrication system ....................................................................................................... 152
8.1 Lubrication system ...............................................................................................................152
8.2 Lube oil pump .......................................................................................................................153
8.2.1 Lube oil pump construction ........................................................................................................... 153
8.2.2 Specifications of lube oil pump ..................................................................................................... 153