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 TM 55-1925-273-10-1
0018 00
RAW WATER PUMP
The raw water pump draws raw water from the sea chest through a duplex raw water strainer. After leaving the duplex raw
water strainer, the raw water is routed to the engine's cooling system. There the raw water pump circulates the raw water
through the heat exchanger (figure 3, item 1) where it absorbs heat from the engine coolant.
KEEL COOLER
NOTE
Only the main and SSDG engines have keel coolers (figure 1, item 5) as part of their systems.
The keel cooler (figure 1, item 5) is mounted o0n the external hull of the vessel and transfers heat from the engine coolant
directly to the sea.
2
1
4
3
6
5
Figure 1. Typical Keel Cooler Engine Cooling System
0018 00-2
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