Wartsila RT-flex50-D User Manual

Maintenance3303−1/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
2/ 5
2. Loosening the stud of bottom end bearing
⇒ Clean the threads of studs 4 as well as th
e
area around nuts 5.
⇒ Place distance bushes 94314a onto th
e
studs.
⇒ Fit and tighten pre-tensioning jacks 9431
4
with open vent screws 7 until there is onl
y
little or no clearance at ’x’ (Fig. ’C’).
⇒ Screw back pistons 8 by about ½ turn.
⇒ Connect the pre-tensioning jacks to hydrau
-
lic unit 94942 as shown in Fig. ’B’.
⇒ Actuate the hydraulic unit till bubble-free o
il
flows out through the vent screws. Clos
e
vent screws.
⇒ Actuate the hydraulic unit up to about 153
0
bar and keep pressure constant.
Pistons 8 of the pre-tensioning jacks must neve
r
exceed the red limiting grooves ’BN’ (Fig. ’C’).
⇒ Screw back nuts 5 by one turn, using roun
d
bar ’RS’.
⇒ Release pressure to ’0’ at the hydraulic un
it
and then remove pre-tensioning jacks.
B
C
y y
6
6
94934
94934a
94935
x
RS
20000
701.013.428.dxf
013.428/05
94314a
7
94314
94935
BN
8
9
4
6
KO
94314a
013429/05
94942
5
Loosening and Tensioning the Connecting Rod Studs
2010

Wartsila RT-flex50-D Specifications

General

Brand	Wartsila
Model	RT-flex50-D
Category	Engine
Language	English