Xinchai 490B Series, Manual

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temperature goes up to 80 毅 C.
2 冤尧 Load and speed should be increased and decreased smoothly. Generally speaking, it
is not allowed to be changed abruptly.
3 冤尧 During the operation of the engine, constantly watch the readings of the gauges on
the control board to see whether they show normal values. Pay attention to exhaust smoke
and its running sound. If any abnormal thing is found, shut down the engine and check it.
2.4 Shutting down of the diesel engine
1) 尧 Before shutting down the engine, gradually reduce its load and speed. Run the
engine at idle speed until the water temperature cools down to 70 毅 C. Then operate the
shut- down lever to shut down the engine.
2 冤尧 When ambient temperature goes below 5 毅 C in the winter and the water
temperature goes below 60 毅 C after shutting down the engine, open the drain cocks on the
cylinder block and the radiator to drain the cooling water to avoid freezing and damaging
the engine(if anti-freezing fluid has been added, it will not be necessary to do so).
2.5 Precaution during Engine Operation
1 冤尧 Operation and maintenance of the engine should be done according to the manual.
2 冤尧 A new engine or an overhauled engine should not work at full load and high speed.
It should take a running- in period of 50 hours with light load ( 臆 50% of load) and low
speed( 臆 2000rpm) before going to its normal operation.
3 冤尧 Fuel should keep clean. It is recommended to keep the fuel still for one week or
more to let the impurities settle down or filter the fuel with silk cloth.
4 冤尧 Keep a normal water temperature (70 毅 C-95 毅 C 冤 . The oil pressure should be 0.2-
0.4MPa at medium speed.
5 冤尧 The engine should be shut down and checked when any abnormal phenomenon
happens during the operation.
2.6 Working Media
1 尧 Oil
Use CD grade oil.
Use different oil for different ambient temperature
SAE grade temperature range
20 -40---35 毅 C
30 -30---35 毅 C
40 -20---40 毅 C
5W -15---40 毅 C
10W -10---35 毅 C
5W/20
SAE grade
5W/30
10W/30
15W/40
20W/40
20/20W
temperature range
-10---30 毅 C
-10---35 毅 C
-5---40 毅 C
-40---10 毅 C
-30---15 毅 C
-40---10 毅 C
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