WinGD WARTSILA RT-flex58T-D, Maintenance Manual

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Maintenance
6606 − 1/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
3/ 3
3. Locating and sealing of leaking cooler tubes in service
Due to corrosion or mechanical damage tube leakages may occur. This causes
cooling water to enter the air duct before cooler 4 and the scavenge air receiver 8.
If it is not possible to wait with the localization or sealing of leaky cooling tubes, this
can be carried out during operation.
Proceed as follows:
⇒ Reduce engine power, until the air temperature before scavenge air cooler
reaches about 65 to 70 _ C, then shut off the water valves before and after the
defective cooler and drain the cooler at connection 10.
⇒
Remove connection chamber 3 and brush soapy water over the pipe open-
ings of cooling tubes 5. Leaking tubes will be revealed by soap bubbles.
⇒ Defective tubes are sealed up by hammering in slightly tapered plugs of hard-
wood, copper etc.
⇒
Stop the engine.
⇒ Remove cover 1 and return chamber 2.
⇒ Seal the same cooling tubes as on the opposite side.
⇒ Complete the scavenge air cooler again, thereby seal the return chamber and
connection chamber as well as the cover with liquid sealing agent.
Danger of accident! Cover 1 (pressurized) must not be removed due to hot scav-
enge air while the engine is running!
4. Transportation of cooler tubestacks
Always utilize specially provided transport straps ’TR’ (see 6606 − 2 ) which can be
swung sideways. Where only holes are provided, use suitable shackles for trans-
portation.
It is recommended to cover the finned surfaces, protecting the cooling fins and pre-
venting the entrance of foreign particles during transportation and storage.
2013
Scavenge Air Cooler: Cleaning (Water Side) on Engine at Standstill