Yanmar BY Series Service Manual page 5

12/05
Measuring Instruments.................................................................. 5-12
Sealants and Compounds ............................................................. 5-13
Tests and Adjustments.................................................................. 5-14
Repair............................................................................................ 5-15
Cylinder Head................................................................................ 5-16
Pistons and Cylinders.................................................................... 5-31
Flywheel and Flywheel Housing.................................................... 5-37
Camshaft and Timing Gear Train .................................................. 5-42
Cylinder Block and Crankshaft ...................................................... 5-56
BY Service Manual
Test Compression ................................................................... 5-14
Cylinder Head Components .................................................... 5-16
General Guidelines.................................................................. 5-17
Remove and Install Cylinder Head Cover ............................... 5-17
Remove and Install Glow Plugs............................................... 5-19
Remove Cylinder Head ........................................................... 5-19
Disassemble Cylinder Head .................................................... 5-22
Clean Cylinder Head Components .......................................... 5-24
Pressure Test the Cylinder Head ............................................ 5-24
Inspect Cylinder Head Components........................................ 5-24
Replace Valve Stem Seals ...................................................... 5-25
Assemble Cylinder Head ......................................................... 5-26
Determine Cylinder Head Gasket Thickness........................... 5-26
Install Cylinder Head ............................................................... 5-27
Remove and Disassemble Piston and Connecting Rod.......... 5-31
Inspect Pistons and Piston Rings ............................................ 5-32
Assemble Piston and Connecting Rod .................................... 5-33
Install Piston and Connecting Rod .......................................... 5-34
Remove and Install Flywheel Housing ................................... 5-37
Remove and Install Drive Coupling ......................................... 5-38
Remove Flywheel .................................................................... 5-39
Replace Rear Crankshaft Seal ................................................ 5-40
Install Flywheel ........................................................................ 5-41
Components ............................................................................ 5-42
Check and Adjust Camshaft Timing ........................................ 5-44
Remove and Install Vibration Damper - 4BY2......................... 5-46
Remove and Install Vibration Damper - 6BY2......................... 5-47
Remove Timing Case Cover ................................................... 5-48
Remove and Install Timing Chain............................................ 5-49
Install Timing Case Cover ....................................................... 5-49
Remove and Install Timing Chain Tensioner........................... 5-50
Remove Camshafts ................................................................. 5-51
Install Camshafts ..................................................................... 5-54
Components ............................................................................ 5-56
Remove Crankshaft................................................................. 5-58
Measure Oil Clearance............................................................ 5-59
Inspect Crankshaft................................................................... 5-61
Inspect Cylinder Block ............................................................. 5-62
© 2009 Yanmar Marine International
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