Maintenance
4325−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
3/ 4
3. Function check
After completing the assembly carry out a function check, for which the following
precautions have to be taken:
3.1 Initial position
D The stop valves of the starting air receivers must still be closed.
D Screw plug 13 of the shut-off valve has to be removed.
D Shut-off valve for starting air is in position CLOSED (closed by hand).
D Venting valve 2.21 to connection ’EV’ must be closed.
D The engine has to be completely assembled, ready to start and the turn-
ing gear must be in the disengaged position.
D The area of flywheel, propeller shaft and propeller must be free of persons or
objects.
D During the functional check the reversing must remain in position STOP and
START may not be actuated under any circumstances.
3.2 Tightness
⇒ Close venting valve 2.27 in the main starting pipe.
⇒ Open the stop valve of a starting air receiver slowly.
Check whether the automatic shut-off valve is airtight, i.e. verify that no air escapes
from the bore of screw plug 14.
3.3 Manual opening
⇒ Open the shut-off valve slowly with the help of handwheel 20 till locking lever
21 is in the position OPENED (by hand). The discharging air at the bore for
screw plug 13 indicates that valve 4 of the shut-off valve and valve body 8 of
the non-return valve are open.
Risk of accident! Great care must be taken for this operation. To prevent acci-
dents from compressed air suddenly escaping out of the bore for screw plug 13 a
sufficient distance has to be kept.
3.4 Automatic closing
⇒ Turn handwheel 20 to position CLOSED till locking lever 21 engages in posi-
tion AUTOMATIC.
D In this position the shut-off valve should, through the spring resistance, be au-
tomatically closed. No more air should come out at the bore for screw plug 13.
D In this position the valve closes positively only if there is a clearance ’S
1
’ (in
new condition min. 2 to max. 5 mm) between spindle 18 and spindle guide 19.
Shut-off Valve for Starting Air: Cleaning and Function Check
2010
CHECK
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