Service Manual for WP6 Diesel Engine
7
17 Preparation before Starting Engine
(1) Check coolant level
If the engine is already installed on a vehicle or platform, you can check the coolant level
through the glass window on expansion water tank at any time, if the coolant is insufficient,
open the filler cap to add coolant. When open a filler cap with pressure relief valve and exhaust
button, be sure to press down exhaust button in advance if the engine is in hot state. Avoid
filling plenty of coolant when the engine is hot, otherwise some parts may be damaged due to
sharp temperature reduction. In an extraordinary situation, if there is no coolant in the engine, it
is allowed to add not too cold water slowly until the water overflows. Start the engine, run the
engine at 1000r/min and keep adding coolant until level gets stable, finally close the filler cap.
(2) Check fuel level
If the engine is already installed on a vehicle, turn on power switch, check the fuel level gauge
on instrument panel or check the fuel tank.
(3) Check engine oil level
Engine oil level should between the bottom scale and top scale on oil dipstick, add engine oil
through oil filling port if necessary.
(4) Check whether all accessories are reliably connected to the engine and eliminate abnormal
phenomenon. Check whether start-up system wirings are normal, whether storage battery is
fully charged. And then open fuel tank valve, loosen the air bleeding screw on fuel coarse filter,
deflate the fuel system by using the hand pump on fuel coarse filter.
18 Start the Engine
Adjust diesel engine throttle to suitable position, appropriately increase the throttle when
environment temperature is lower than 5
o
C, and then press the start button to start the engine. To
prevent damaging the engine, continuous starting time should not exceed 15s, if failed to start the
engine in the first 15s, then restart it 2min later. But if failed three times in a row, you should stop
trying, find out the cause and eliminate it.
After the engine is started, pay attention to all readings of gauges on instrument panel and keep
the engine run idly, at this point engine oil pressure should not lower than 120kPa, idling time
should not be too long.
Use starting aid to start the engine in cold weather. By controlling the relay to put heating
equipment into work, the engine can be successfully started in -30
o
C environment.
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