Operation and Maintenance Manual forWP10 Series Four-valve Diesel Engine (China IV, V)
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the moderate.
3) Speed down timely when driving on a slope road. Long term work under large torque condition, small load and
low rotating speed are not recommend, for which may lead to excessive oil consumption.
4) In normal use, you can run the diesel engine continuously at rated power and rated speed. But if the running
speed is 105% or 110% of the rated speed, it can be allowed to run for 20 minutes only. After the diesel engine is
unloaded, it is required to run the engine at idle speed for (1~2) minutes before shutdown.
5) Check the following parameters in operation:
a. Oil pressure in main oil passage:(350~550) kPa;
b. Oil temperature in oil pan: ≤110°C;
c. Coolant outlet temperature: (80+5) °C, no more than 95°C;
d. Exhaust temperature after turbine: <600°C;
e. Intake temperature after intercooler: (50~55) °C.
6) Check the color of exhaust gas to estimate the working performance of fuel injector and the operating load; if
the color is abnormal (i.e., serious black or white smoke), stop the engine for troubleshooting.
Notice: Check the diesel engine for water, air and oil/fuel leakages during operation; and if any, stop the
engine for troubleshooting.
7) The operator should acknowledge the following features of the engine:
a. The fuel consumption is relatively low at max torque, and increases along with the rotation speed rise.
b. The torque reaches its peak value within the medium speed range (1,200 - 1,500 r/min);
c. The engine power increases along with the speed, and reaches its rated value at rated speed.
8) Precautions for engine running under cold environments:
a. Fuel: Choose the diesel fuel of proper grade according to the ambient temperature in winter.
b. Lubricating oil: Choose the lubricating oil with proper viscosity based on the season.
c. Coolant: The cooling system should be filled with coolant (containing antifreezing additives) of proper grade
according to the ambient temperature.
d. Startup: Use starting aid when necessary in winter. After starting the engine, the running speed and load of
diesel engine can be increased only after the oil pressure and water temperature become normal.
e. Battery: Before the cold season comes, make sure to check the electrolyte level, viscosity and unit voltage of
the battery; and if the diesel engine is not used for a long time and the ambient temperature is very low, it is
recommended to remove the battery and keep it in a warm room.
f. Shutdown: To stop the engine in cold weathers, unload the engine first, and run it at idle speed for (1~2)
minutes, and wait for a while until the water temperature and oil temperature lower down; the coolant with
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