Yanmar 4BY - Page 67

ENGINE
5-12
BY Service Manual
Special Torque Chart
Crankshaft and
Bearings
Main Bearing Cap
Replace Bolts
Lightly oil threads
4BY
6BY
M10x80
12.9 PHR
Initial Torque
Torque Angle
22 N·m (195 in.-lb)
Plus 90°
Oil Pump
Oil Pick-Up to Oil Pump
4BY
6BY
M6x20 - 10 N·m (89 in.-lb)
Reinforcement Shell
4BY
6BY
M6x16 - 10 N·m (89 in.-lb)
Oil Filter
Oil Filter Cap to Oil Filter
Housing
4BY
6BY
- - 25 N·m (221 in.-lb)
Thermostat and
Connections
Coolant Return to Cylinder
Head and Oil Filter Housing
4BY
6BY
M8x18 - 10 N·m (89 in.-lb)
Air Intake
Intake Manifold to Cylinder
Head
4BY
6BY
M7x50 - 15 N·m (133 in.-lb)
Exhaust
Turbocharger to Exhaust
Manifold
4BY
6BY
-
Apply Copper
Anti-seize to Threads
23 N·m (204 in.-lb)
Turbocharger Oil Supply Line
4BY
6BY
M10
Replace Banjo Bolt
and Sealing Rings
22 N·m (195 in.-lb)
Turbocharger Oil Return to
Crankcase
4BY
6BY
- Hose Clamp 3 N·m (27 in.-lb)
Exhaust Manifold to Cylinder
Head
4BY -
Apply Copper
Anti-seize to Threads
19 N·m (168 in.-lb)
6BY - 13 N·m (115 in.-lb)
Alternator
Wires to Alternator 4BY M8 - 13 N·m (115 in.-lb)
Alternator to Crankcase 4BY M10 - 38 N·m (28 ft-lb)
Belt Pulley with Free Wheel 4BY - - 80 N·m (59 ft-lb)
Electrical System
Engine Wiring
Harness
Wiring Harness to Ground
Holder
4BY M6 - 7 N·m (62 in.-lb)
DDE Wiring
Harness Pick Up to
Battery Positive
Terminal
4BY
6BY
M6 - 9 N·m (80 in.-lb)
Injector Guide
Strip to Cylinder
Head Cover
4BY
6BY
- - 3.5 N·m (31 in.-lb)
Coolant Sensor to Cylinder
Head
4BY
6BY
- - 13.4 N·m (119 in.-lb)
Camshaft Position Sensor
Pickup
4BY
6BY
- - 2.3 N·m (20 in.-lb)
Fuel System
Injection Pump Drive
Sprocket to High-Pressure
Pump
4BY
6BY
M14x1.5 - 65 N·m (48 ft-lb)
Fuel Measuring Valve to
High-Pressure Pump
4BY
6BY
M5x20 - 6.6 N·m (58 in.-lb)
System Component Model Thread Comments Specification