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Yanmar 4BY - Page 57

Yanmar 4BY
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ENGINE
5-2
BY Service Manual
Pistons and Cylinders .................................................................... 5-36
Removal and Disassembly of Piston and Connecting Rod ...... 5-36
Inspection of Pistons and Piston Rings.................................... 5-37
Assembling Piston and Connecting Rod.................................. 5-38
Installation of Piston and Connecting Rod ............................... 5-39
Flywheel and Flywheel Housing..................................................... 5-42
Remove and Install Flywheel Housing .................................... 5-42
Remove and Install Drive Coupling.......................................... 5-42
Removal of Flywheel................................................................ 5-44
Replacement of Rear Crankshaft Seal..................................... 5-44
Installation of Flywheel............................................................. 5-45
Camshaft and Timing Gear Train................................................... 5-46
Components............................................................................. 5-46
Checking and Adjusting Camshaft Timing ............................... 5-48
Removing and Installing Vibration Damper - 4BY .................... 5-50
Removing and Installing Vibration Damper - 6BY .................... 5-51
Removing Timing Case Cover ................................................. 5-52
Removing and Installing Timing Chain..................................... 5-52
Installing Timing Case Cover ................................................... 5-53
Removing and Installing Timing Chain Tensioner.................... 5-54
Removal of Camshafts............................................................. 5-54
Installation of Camshafts.......................................................... 5-57
Cylinder Block and Crankshaft....................................................... 5-60
Components............................................................................. 5-60
Removal of Crankshaft............................................................. 5-62
Measuring Oil Clearance.......................................................... 5-63
Inspection of Crankshaft........................................................... 5-64
Inspection of Cylinder Block..................................................... 5-66
Crankshaft Installation.............................................................. 5-66
Replacing Front Crankshaft Seal ............................................. 5-68
Intake Manifold............................................................................... 5-70
Removal ................................................................................... 5-70
Installation ................................................................................ 5-71
Exhaust Manifold............................................................................ 5-72
Remove.................................................................................... 5-72
Install........................................................................................ 5-72
Attaching Engine to Repair Stand .................................................. 5-73

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