2. Inspection and adjustment
90
b) Spray and injection states
• Operate the nozzle tester lever at a rate of
once or twice a second and check no
abnormal injection.
• If normal injection as shown below cannot
be obtained, replace the fuel injection valve.
• No extreme difference in angle (θ).
• No extreme injection angle difference (α).
• Finely atomized spray.
• Excellent spray condition.
3) Nozzle valve sliding test
Wash the nozzle valve in clean fuel oil. Place
the nozzle body vertically and insert the
nozzle into the body to about 1/3 of its length.
The valve is normal if it smoothly falls by its
own weight into the body. In case of a new
nozzle, remove the seal peel, and immerse it
in clean diesel oil or the like to clean the inner
and outer surfaces and to thoroughly remove
rust-preventive oil before using the nozzle.
Note that a new nozzle is coated with rust-
preventive oil and is pasted with the seal peel
to shut off outer air.
(3) Check the impeller of the seawater
pump
The impeller must be replaced with new one
periodically (every 1000 hrs or four years
whichever comes first).
Refer to 2.2.4 (5) for the procedure.
(4) Clean and check the water passages
When it is used for a long time, cleaning of the
seawater passages is periodically necessary,
because trash, scales, rust, and so on collect
in the seawater passages and the cooling
performance declines.
(a) Cleaning and inspection of seawater rubber
hoses.
1) Check the dust and trash inside the hoses. If
necessary, clean it.
2) Replace the used hose clips with new ones, if
necessary.
010631-00E
Abnormal
010632-00X
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