WÄRTSILÄ RT-flex50-D, Maintenance Manual

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Maintenance
2728−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 3
Key to Illustrations:
1 Cylinder cover 12 Head screw M6x55
2 Housing 13 Control valve (solenoid valve)
3 Cover 14 Plug
4 Piston 15 Joint ring
5 Piston ring 16 O-ring
6 Valve spindle 17 O-ring
7 Piston ring 18 O-ring
8 Compression spring
9 Self-locking nut
10 Screw M12x35 GL Tape hole
11 Screw M20x150 SL Starting air
1. General
Should functional difficulties occur with the starting valves when starting, or should
a starting air pipe near to the connection become noticeably hotter in operation
than on the neighbouring cylinders, then the starting valve must be dismantled and
reconditioned at the very next opportunity.
If no such difficulties occur it is recommended to dismantle yearly at random one
starting valve for a thorough check and to overhaul the other starting valves in fre-
quencies determined by such checking.
2. Removal from cylinder cover
⇒
Remove the control air pipe from the starting valve and disconnect plug 14
from control valve 13.
⇒
Loosen screws 10.
⇒
Loosen screw 11 and remove upper part consisting of cover 3 and control
valve 13.
⇒
Fit jacking screws M12 into the tap holes ’GL’ in housing 2 and by tightening
them withdraw the lower part of the starting valve from the cylinder cover.
⇒
Instead of the jacking screws, fit eye bolts and then carefully lift the lower part.
Remark: When the removal is carried out with the cylinder cover fitted on the en-
gine, the vacated opening must be immediately covered by suitable means to pre-
vent the possibility of foreign particles entering the combustion space.
3. Dismantling a starting valve
⇒
For further dismantling clamp the valve on the milled faces below the spindle
head (spanner purchase) in a vice.
⇒
Loosen self-locking nut 9, however not yet remove it.
⇒
Unclamp the starting valve and place it on the workbench.
⇒
Remove self-locking nut.
⇒
Pull piston 4 and compression spring 8 from housing 2.
⇒
Remove valve spindle 6.
Starting Valve
Removal, Fitting and Dismantling, Grinding-in and Assembling
2010