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 LUBRICATION SYSTEM
TESTING AND ADJUSTING
LUBRICATION SYSTEM
One of the problems in the list that follows will
MEASURING ENGINE OIL PRESSURE
generally be an indication of a problem in the lubrication
system for the engine.
Tools Needed:
6V3150 Engine Pressure Group or
TOO MUCH OIL CONSUMPTION
5P6225 Hydraulic Test Box.
OIL PRESSURE IS LOW
OIL PRESSURE IS HIGH
TOO MUCH BEARING WEAR
INCREASED OIL TEMPERATURE
TOO MUCH OIL CONSUMPTION
Oil Leakage on Outside of Engine
Check for leakage at the seals at each end of
the crankshaft. Look for leakage at the oil pan gasket
INSTRUMENT PANEL
and all lubrication system connections. Check to see if
oil comes out of the crankcase breather. This can be
An oil pressure gauge that has a defect can give an
caused by combustion gas leakage around the pistons.
indication of low or high oil pressure.
A dirty crankcase breather will cause high pressure in the
crankcase, and this will cause gasket and seal leakage.
Oil Leakage Into Combustion Area of Cylinders
Oil leakage into the combustion area of the
cylinders can be the cause of blue smoke. There are
four possible ways for oil leakage into the combustion
area of the cylinders:
1.
Oil leakage between worn valve guides and
valve stems.
2.
Worn or damaged piston rings, or dirty oil return
holes in the piston.
6V3150 ENGINE PRESSURE GROUP
3.
Compression ring and/or intermediate ring not
installed correctly.
1. Differential pressure gauges. 2. Zero
adjustment screw. 3. Pressure gauge 0 to
4.
Oil leakage past the seal rings in the impeller
1100 kPa (0 to 160 psi). 4. Pressure tap. 5.
end of the turbocharger shaft.
Pressure gauge 0 to 415 kPa (0 to 60 psi).
Too much oil consumption can also be the result
The 6V3150 Engine Pressure Group can be
if oil with the wrong viscosity is used. Oil with a thin
used to measure the pressure in the system. This tool
viscosity can be caused by fuel leakage into the
group has a gauge to read pressure in the oil manifold.
crankcase, or by increased engine temperature.
Special Instruction Form No. SEHS7851 is with the tool
group and gives instruction for its use.
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