Perkins 4008-30 SD8, Эксплуатация систем, испытания и настройка

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An engine oil pressure indicator may show that there
is enough engine oil pressure, but a component is
worn due to a lack of lubrication. In such a case, look
at the passage for the engine oil supply to the
component. A restriction in an engine oil supply
passage will not allow enough lubrication to reach a
component. This will result in early wear.
i02693005
Excessive Engine Oil
Consumption - Inspect
Engine Oil Leaks on the Outside of
the Engine
Check for leakage at the seals at each end of the
crankshaft. Look for leakage at the gasket for the
engine oil pan and all lubrication system connections.
Look for any engine oil that may be leaking from the
crankcase breather. This can be caused by
combustion gas leakage around the pistons. A dirty
crankcase breather will cause high pressure in the
crankcase. A dirty crankcase breather will cause the
gaskets and the seals to leak.
Engine Oil Leaks into the
Combustion Area of the Cylinders
Engine oil that is leaking into the combustion area of
the cylinders can be the cause of blue smoke. There
are several possible ways for engine oil to leak into
the combustion area of the cylinders:
• Leaks between worn valve guides and valve
stems
• Worn components or damaged components
(pistons, piston rings, or dirty return holes for the
engine oil)
• Incorrect installation of the compression ring and/
or the intermediate ring
• Leaks past the seal rings in the turbocharger shaft
• Overfilling of the crankcase
• Wrong dipstick or guide tube
• Sustained operation at light loads
Excessive consumption of engine oil can also result if
engine oil with the wrong viscosity is used.
i02693006
Increased Engine Oil
Temperature - Inspect
If the engine oil temperature is higher than normal,
the engine oil cooler may have a restriction. Look for
a restriction in the passages for engine oil in the
engine oil cooler. The engine oil pressure will not
necessarily decrease due to a restriction in the
engine oil cooler.
Make sure that the cooling system is operating
properly. A high coolant temperature in the engine oil
cooler will cause high engine oil temperature.
i02693007
Engine Oil Pressure is Low
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to local regulations
and mandates.
The following conditions can cause an indication of
low engine oil pressure:
• Low engine oil level
• Problem with the engine oil pressure gauge
• Contaminated engine oil
• Improper circulation of the engine oil
• Worn components
M0064276 25
Lubrication System