Wartsila RT-flex50-D User Manual

Maintenance3303−1/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
4/ 5
4. Loosening the stud of top end bearing
Remark: For loosening the studs always follow
the sequence shown in Fig. ’D’ i.e. a+a and b+b
.
⇒ Clean the threads of studs 1 as well as th
e
area around nuts 2.
⇒ Place pre-tensioning jacks 94315 diago
-
nally onto the studs as shown in Fig. ’D’, an
d
completely screw them on with opened ven
t
screw 7 until there is only little or no clear
-
ance at ’x’ (Fig. ’E’).
⇒ Turn back the pre-tensioning jacks by abou
t
½ turn (gap ’SA’ in Fig. ’E’).
⇒ Connect the pre-tensioning jacks to hy
-
draulic unit 94942 as shown in Fig. ’D’.
⇒ 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. ’E’).
⇒ Screw back nuts 2 by one turn, using roun
d
bar ’RS’.
⇒ Release pressure to ’0’ at the hydraulic un
it
and then remove pre-tensioning jacks.
⇒ Proceed in the same manner for the secon
d
pair of the connecting rod studs.
PRE-TENSIONING JACK
PLACED FOR LOOSENING
PRE-TENSIONING JACK
PLACED FOR TENSIONING
E
F
009.755/02 009.756/02
3
1
2
9
8
BN
7
x
SA
RS
x
KO
BN
D
94315
94934
94934a
94935
I
I
y y
3
3
94935
a
b
b
a
013.431/05
94942
Loosening and Tensioning the Connecting Rod Studs
2010

Wartsila RT-flex50-D Specifications

General

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