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Yanmar 4BY - Page 116

Yanmar 4BY
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ENGINE
BY Service Manual
5-61
Cylinder Block and Crankshaft
1 Cylinder Block
2 Coolant Drain Plug
3–Seal
4–Dowel Sleeve
5–Dowel Sleeve
6 Piston Cooling Jet
7 Crankshaft Pulse Generator Wheel
8 Rear Crankshaft Seal Assembly
9 Lower Main Bearing Inserts
10 Lower Main / Thrust Bearing Insert
11 Oil Deflector
12 Upper Main Bearing Inserts
13 Upper Main / Thrust Bearing Insert
14 Main Bearing Cap Bolt
15 Dowel Sleeve
16 Timing Chain Oiler
17–Seal
18 Main Bearing Cap
Note: Service procedures for 4BY and 6BY engines are similar, therefore graphics shown will be
representative and might not match the engine being serviced.

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