Operation and Maintenance Manual forWP10 Series Four-valve Diesel Engine (China IV, V)
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Generally, the DEF consumption accounts for 3~5% of the fuel consumption (by volume). Check the liquid level
of DEFfrequently based on the use condition. Please maintain the liquid level at 30~80% of full level and timely
add if necessary.
Figure 4-2 Urea Level Identification on Urea Tank
4) Check all accessories of the diesel engine for reliable connections.
5) Check the starting system for normal wiring and check and ensure that the battery is chargedsufficiently.Then
open the fuel tank valve, loosen the bleeding screw onprimary fuel filter, and operate the manual pump on the fuel
filter toremove the air inside the fuel system.
4.5 Diesel Engine Starting
1) Turn the power switch, ignition key to the starting position, andmove the gear lever to the neutral gear position
before starting the engine.
2) Depress the clutch pedal and throttle pedal, and turn the ignition key to start the engine.Ifthe engine fails to be
started within 5~10 seconds for the first attempt, start it again one minute later. If the engine still fails to be started
after three attempts, stop the attempt and find out and solve the malfunction before retry.After the engine is started,
check the readings of meters. The engine oil pressure meter shall immediately indicate a pressure. For the cold
engine, you should run it at idle speed for a while (no more than 10 minutes).
3) It is recommended to use the starting aid in case of engine startup at lower temperature. Under the action of
relay, the electronic heating flange begins to work and then heats the incoming air, allowing a smooth startup of
the engine at -30°C.
4.6 Diesel Engine Running
1) After the engine is started, run it at idle speed for a few minutes and then increase the speed to (1,000~1,200)
r/min and add part load.Only when the water outlet temperature is higher than 60°C and the oil temperature is
higher than 50°C, can you operate the engine with fullload. It is recommended to increase the load and speed
gradually, and avoid sudden loading or unloading as possible.
2) In the running-in period (about 60h or 3,000km) of diesel engine, the engine can only be run with load below
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