Maintenance0352−1/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
2/ 16
Group Description Thread Tightening values Lubricant
1
[bar]
2
[Nm]
3
[_(; mm]
2751−1
Exh. valve cage, nut for waisted stud
13
M64 1500
(155_)
Oil
2751−2
Exhaust valve, screw for measuring
cone − piston
14
M8 35
Oil
Lower − upper housings, nut for
waisted stud
15
M16 125
Oil
3
3103 *
Coupling bolt for flywheel
16
M48
20_
MOLYKOTE G
3114 *
Coupling bolt for propeller shaft
17
M85x4
40_
MOLYKOTE G
3130−2 *
Crankshaft − vibration damper, nut
for coupling bolt
18
M85x4
35_
MOLYKOTE G
*
Crankshaft − counterweight, nut for
coupling bolt
19
M85x4
35_
MOLYKOTE G
3146−1
Axial damper − bedplate, fixing bolt
20
M24 (540)
45_
Oil
3303−1
Connecting rod, stud for top end
bearing
21
M48x5 1500
1
st
step 1000 bar (gap = 0 mm)
2
nd
step 1500 bar
Oil
Check: 1
st
step to 2
nd
step
(15_)
Connecting rod, stud for bottom end
bearing
22
M56x6 1500
1
st
step 950 bar (gap = 0 mm)
2
nd
step 1500 bar
Oil
Check: 1
st
step to 2
nd
step
(30_)
3403−1
Piston rod − crosshead, nut to
waisted stud
23
M27x2 1500
(80_)
Oil
3403−3
Piston rod − piston crown, nut to
waisted stud
24
M27x2 1500
(115_)
Oil
Spraying plate − piston rod, waisted
screw
25
M10x90 1
st
step 15 Nm
1
st
step to 2
nd
step 40_
no additional
lubricant required
4
4103 *
Intermediate gear bearing − column,
waisted bolt
26
M30 (1200
)
45_
Oil
1 When using other hydraulic jacks, required pressure in bar must be calculated in relation to effective jack piston surface!
Conversion factor: 1 Nm = 0.102 mkp 1 bar = 1.02 kp/cm
2
2 Tightening torque
3 Tightening angle or elongation
− Numbers in
f refer to illustrations on pages 7 to 16.
− Values in parentheses (...) are for information only, to be used for comparison.
− Screwed connections must be tightened in accordance with values not in parentheses.
Respective lubricant has to be applied to threads and seating surfaces, if no other instructions are mentioned.
− Bostik Findley Inc. (USA) is manufacturer of Never-Seez NSBT-8.
* Tightening procedure not mentioned in this Manual.
2010
ightening Values of Important Screwed Connections
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