Doosan AD158TI, Operation & Maintenance Manual

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General information - 42 -
4.5.2. Inter-cooler
Inter cooler depends on the intake air condition
greatly. The fouled air pollutes and clogs the
air fins of the inter cooler. As a result of this,
the engine output is decreased and the engine
malfunction may be occurred. Therefore
always check weather the intake air systems
like air filter element are worn or polluted.
The inter-cooler has to be removed from the
engine for cleaning.
< Inter cooler cleaning >
In order to maintain the heat transfer efficiency of the inter-cooler, it is necessary to clean it at regular inter-
vals. For this purpose, dismantle the inter-cooler. In almost all cases, it will suffice to clean the individual
parts in a hot alkaline solution, e.g. a 3 to 5% P3-FD solution.
If hard and firmly adhering scale deposits continue to exist, a second treatment should be made with a des-
caling agent which will not corrode the cooler core. Use new gaskets when reassembling the inter-cooler.
Be sure to clean the sealing surfaces carefully before installing the gaskets.
Observe the specified pressure when making the hydraulic test.
Observe the specified pressure when making the hydraulic test.
Cleaning of inter cooler : Every 1,000 hours.
4.5.3. Turbo-charger cleaning
●
Turbo-charger should clean every 2,000 hours. The only points to be observed are the oil pipes which
should be checked at every oil change for leakage and restrictions and should check the condition of
turbo-charger like oil leaks, unusual turbo sounds periodically.
●
Air cleaner element should be checked and cleaned periodically to prevent foreign matters from entering
the inside of the engine.
●
Should check and measure the pressure of intake air and exhaust gas periodically. If there is an air leak-
age, should repair the problem at once to prevent from occurring the engine power loss and over heating.
●
In case of operating in highly dust or oil-laden atmospheres, cleaning of the air compressor impeller may
be necessary from time to time. To this end, remove compressor casing
(Caution : Do not skew it!) and
clean in a non-acid solvent, if necessary use a plastic scraper.
EB2O3004
Test gauge pressure
Water side 400 kPa (4 bar)
Charge air side 300 kPa (3 bar)