Yanmar 4BY - Removing and Installing Vibration Damper - 6 BY

ENGINE
BY Service Manual
5-51
Camshaft and Timing Gear Train
Figure 5-80
8. Tighten bolt to specification. Use a torsion
angle tool such as that shown (Figure 5-80).
Specifications
9. Install starter motor. See Remove and Install
Starter Motor on page 10-7.
10. Install alternator and seawater pump belts. See
Remove and Install Alternator on page 11-7
and Replace Seawater Pump Belt on
page 7-21.
11. Connect battery negative (-) cable.
Removing and Installing Vibration
Damper - 6BY
1. Disconnect battery negative (-) cable.
2. Remove alternator and seawater pump drive
belts. See Remove and Install Alternator on
page 11-7 and Replace Seawater Pump Belt on
page 7-21.
Figure 5-81
3. Remove bolts (Figure 5-78, (1)).
4. Remove the vibration damper.
5. Place vibration damper on crankshaft and
install new bolts.
6. Torque-turn tighten bolts diagonally to
specification.
Specifications
7. Install alternator and seawater pump belts. See
Remove and Install Alternator on page 11-7
and Replace Seawater Pump Belt on
page 7-21.
8. Connect battery negative (-) cable.
Vibration Damper Bolt
Torque
Specification
Initial Torque 100 N·m (74 ft-lb)
Second Torque Additional 60°
Third Torque Additional 60°
Final Torque Additional 30°
0003833
Vibration Damper Bolt
Torque
Specification
Initial Torque 20 N·m (177 in.-lb)
Second Torque Additional 120°