Operation and Maintenance Manual and User Service Guide for Industrial Power WP10 Series Diesel Engine
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generator can output electricity, which otherwise can burn the testing
bulb or diode.
j.
With the rectifier connected with stator winding, it is prohibited to use a
megger or 220V AC power supply to check for insulation of generator.
k.
The generator should be reliably connected to the battery. Moreover,
suddenly disconnecting them will generate high voltage, damaging to
the generator or governor.
l.
To match the governor with the AC generator, the voltage grade and
grounding type of AC generator should be same to those of governor. In
addition, the governor power should be not be less than that of generator.
m. The wiring should be connected correctly.
5.7. Use and maintenance of oil pump
Oil pump for the WP10 diesel engine is of external engaged gear pump.
The two gears with same number of teeth could mesh with each other.
The two-gear contrarotation and gear space should push the oil from the
low-pressure chamber to the high-pressure chamber. The consecutive
rotation of gear could continuously provide the each lubricating system
with oil.
a.
Pressure-limiting valve is mounted on the oil pump, which functions to
prevent the oil pump and lubricating system from having too high
pressure and accordingly ensure each part works safely. The pressure-
limiting valve also functions as bypass valve. When the oil pressure
exceeds the pre-set value, this valve will open, allowing partial oil to
flow into the oil pan and accordingly reduce the oil pressure. The oil
pressure can be adjusted by a spring of which preload is already well set.
Therefore, user is not expected to change it.
b.
The oil pump performance is mainly dependent on the clearance
between the gear in the oil pump and its housing (end clearance and
radial clearance).Widened clearance can lead to oil leakage, reducing
the pressure and amount of oil. Narrowed clearance should result in
severe wear.
c.
When the oil pressure drops, repair the oil pump if other failures are
ruled out. To check the oil pump, firstly check whether there is leakage
or burn happened to the oil pump. If not, firstly check the pressure-
limiting valve, and then remove the oil pump. Check whether the
pressure-limiting valve spring is softened, or whether the pump and end
