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TM 9-2320-356-BD
Section V.
ENGINE LUBRICATION SYSTEMS
5-15.
GENERAL
Engine lubrication is essential for moving components; crankshaft bearings and
diesel engine piston crowns are especially critical.
The pressure lubrication of
the bearings and the cooling spray to the piston crowns are examples of the dual
purpose of the engine lubricant.
Bypassing or rendering any portion of the
lubrication system inoperative will degrade the length of engine life.
Figure 5-1.
Typical Lubrication Systems.
5-16.
LUBRICATION SYSTEM PUMP FAILURE
General Information:
The oil pump is needed to provide lubrication to engine components. A warning
light or low or no reading of gage indicates a problem. The main and rod bearings
as well as a minimal splash lubrication of the pistons is possible by overfilling
the crankcase with oil.
However, components such as blower, blower drive gears, or
turbocharger will not receive any lubrication from overfilling. Valve train
components will also lack lubrication but can operate for short time periods.
Overfilling the crankcase with oil is a last resort option which should be used
only to move under cover.
Engine failure will occur if used for normal or limited
operation.
Limitations:
o Severely degraded mobility
o Engine destruction likely within 5 minutes
5-16
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