WÄRTSILÄ VASA 6L32, Instruction Manual

Page: 140 / 394

F: Piston
Piston type 3
Pos. Screw connection Torque (Nm)
3. Piston crown connection screws.
1. Lubricate threads and contact
surfaces with engine oil.
2. Tighten all screws.
3. Tighten all screws further with an
angle of
4. Loosen screws 1 and 3.
5. Tighten screws 1 and 3.
6. Tighten screws 1 and 3 further with an
angle of
7. Loosen screws 2 and 4.
8. Tighten screws 2 and 4.
9. Tighten screws 2 and 4 further with an
angle of
10. Test for the right tightness. Screw should not
move when tightening by
165 Nm torque.
Note! When changing piston crown renew all
screws
30
±
1 Nm
96° (
+5°
/
-0°
)
30
±
1 Nm
81° (
+5°
/
-0°
)
30
±
1 Nm
81° (
+5°
/
-0°
)
1
4
2
3
View A Piston with 4 screws
Piston of type 3
3
A
Fig 07-16
400730200142
07 Tightening Torques and Use of Hydraulic Tools 32-200643-01
07 - 16 WÄRTSILÄ 32