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 TM 55-1925-273-10-1
0017 00
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Figure 3. Engine Air Starting System
LUBRICATING OIL SYSTEM
The complete engine lubricating oil system is a combination of five separate systems, holding 125 gallons (473 liters) of
lubricating oil. The five separate systems are: the main lubricating system, the piston cooling system, the scavenging oil
system, the turbocharger lubrication (soakback) system, and the prelube system. Each system has its own oil pump. The
main lube oil pump and main lube oil and piston cooling oil pump (figure 4, item 1), although individual pumps, are both
contained in one housing and driven from a common drive shaft. The scavenging oil (figure 4, item 2), soakback, and
prelube pumps are separate pumps. All pumps except the soakback and the prelube pumps are driven from the accessory
gear train at the front of the engine.
0017 00-4
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