signal when the oil level is too high or too low.
Lube Oil System Components
An oil level sensor on the FFG-class ship monitors
oil level from within the tank and transmits a
In this section we will describe the lube oil
continuous electrical signal for remote readout
system components in the order of lube oil flow,
of lube oil level. The oil tank is considered
from the LOSCA through the system and back
full when oil is visible at the 24-gallon sight
to the LOSCA.
glass.
Instrumentation valves, a filter differential
OIL TANK.--The oil tank is an integral
pressure transducer, a filter differential pressure
part of the LOSCA. The early configuration of
gauge, a level sensor, and an oil temperature
cast construction on the DD-class ship contains
switch are mounted on the tank. A gravity fill cap
six sight glasses (view ports) for visual detection
is installed on the tank cover fill port. The fill port
of oil level in the tank. Starting with the
has a strainer to prevent foreign material from
second glass from the bottom, they are spaced
entering the tank. Baffles are located in the
at 5-gallon intervals. On the later configuration
bottom of the tank to minimize oil sloshing. A
of fabricated construction (fig. 2-47), three
deaerator is inside the tank at the scavenge inlet
sight glasses are provided for low level, 19-gallon
(which separates air from the scavenge oil). You
level, and full level positions. An oil level
can drain the oil tank by positioning a lever
switch on the DD-class ship monitors oil level
located in the assembly base.
from within the tank and transmits an electrical
Figure 2-47.--LOSCA.
2-41
