d. Lubricating oil supply in
air compressor. As discussed in
paragraph 2.5, the air compressor
is needed to operate a great deal
of the equipment on the locomotive;
it has its own oil pumps and
pressure lubricating system. When
the engine is stopped, the oil
level in the compressor crankcase
is checked with a bayonetshaped
dipstick, located as shown in
figure 2.8. The level should be
between the low and high marks.
Figure 2.8. Location of Air
Compressor Lubrication
Dipstick.
2.11. WATER CHECKPOINTS
The Army's dieselelectric locomotives have watercooled engines. In
carrying out preventive maintenance procedures, both the level and
temperature of the water must be checked. Subparagraphs a and b give the
details.
a. Level. The water used to
cool the diesel engine is stored in
a reservoir equipped with a gage.
Figure 2.9 shows the markings on a
typical one. The water level
should be between low and full at
one of the readings, depending upon
whether the engine is running or
stopped. The engine should not be
operated if no water appears in the
gage.
b. Temperature. The engine
water temperature gage, located in
Figure 2.9. Water reservoir
the locomotive cab, shows the
and Marked Gage.
temperature of the water in the
engine cooling system. Recommended operating temperatures on different
locomotive models vary. On one, the range is from 160 to 170 F.; on
another, from 175 to 180 F. After the engine of the latter model is
started, it is idled until the temperature is normal120 F. or more
before pulling any cars.
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