Yanmar BY Series Service Manual page 102

Camshaft and Timing Gear Train
1 – Exhaust Camshaft
2 – Intake Camshaft
3 – Guide Rail
4 – High-Pressure Fuel Pump
5 – Guide Rail Pin
6 – Upper Timing Chain
7 – Sprocket
8 – Timing Case Cover Gasket
9 – Timing Case Cover
10 – O-Ring
11 – Access Plug
12 – Plug
13 – Seal
14 – Guide Rail
15 – Sprocket-to-High-Pressure Pump Nut
16 – Lower Timing Chain
17 – Crankshaft Sprocket
18 – Lower Chain Tensioner
19 – Hydraulic Tensioner
20 – Pivot Pin
21 – Upper Chain Tensioner
22 – Sprocket Retaining Screw
BY Service Manual
ENGINE
5-47