PRIN. OF INTERNAL COMBUSTION ENGINES - OD1619 LESSON 2/TASK 2
The regulator unit is made up of a core and a housing. The core through which the
oil circulates is of cellular or bellows construction, built to expose as much oil
as possible to the coolant that circulates through the housing. The regulator is
attached to the engine so that the oil will flow through the regulator after
passing through the pump. The oil leaves the regulator either heated or cooled,
depending on the temperature of the coolant, and is then circulated through the
engine.
(3) Oil Cooler (figure 57, view B, on the previous page). The types of oil
coolers used with combat vehicles consist of a radiator through which air is
circulated by movement of the vehicle, or by a cooling fan. Oil from the engine is
circulated through this radiator and back to the sump or supply tank. In this
system, the radiator will act only to cool the oil. It will not heat oil in a cold
engine.
FIGURE 58. OIL LEVEL INDICATOR.
g. Oil Level Indicator (figure 58). The oil level indicator is usually of a
bayonet type. It consists of a small rod, known as a dipstick, that extends
through a tube into the crankcase. It is marked to show when the crankcase is full
or, if it is low, how much oil is needed. Readings are taken by pulling the
dipstick out and noting the oil level which it indicates.
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