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Yanmar 4BY - Page 68

Yanmar 4BY
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ENGINE
BY Service Manual
5-13
Special Torque Chart
Fuel System
Fuel Injection
Nozzles and Lines
Fuel Injector in Cylinder Head
Cover
4BY
6BY
M6 - 9 N·m (80 in.-lb)
High-Pressure Line Union
Nuts
4BY
6BY
M14x1.5 - 23 N·m (204 in.-lb)
Pressure Sensor to Fuel Rail
4BY
6BY
- - 70 N·m (52 ft-lb)
Pressure Regulator to Fuel
Rail
4BY
6BY
- - 80 N·m (59 ft-lb)
Fuel Return to Rail
4BY
6BY
Banjo Bolt - 25 N·m (221 in.-lb)
Poly V-Belt Drive
Idler Pulley to Alternator
Bracket
4BY
M8x35
10.9
- 28 N·m (21 ft-lb)
Thermostat and
Coolant Pipes
Coolant Return Pipe to
Crankcase and Oil Filter
Housing
4BY M8x18 - 11 N·m (97 in.-lb)
Glow Plugs Glow Plugs
4BY
6BY
- - 17.5 N·m (154 in.-lb)
System Component Model Thread Comments Specification

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