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4.2.9 Lube oil system
1 Exhaust turbocharger, right
side
2 Exhaust turbocharger, left
side
3 Centrifugal oil filter
4 Engine oil heat exchanger
5 Oil sampling connection
6 Lube oil filter
7 Bypass valve on lube-oil fil-
ter
8 Diesel engine
9 HP fuel pump
10 Lube-oil priming pump inlet
connection
Technology
• Wet-sump forced-feed lubrication system
• High engine oil filtering efficiency provided by centrifugal oil filters (optional)
Benefits
• Long oil-change intervals
Function
The lube oil pump (12) draws oil from the oil pan through a suction basket (14) and delivers via a connecting
line it to the engine oil heat exchanger (4) and to the centrifugal oil filter (3).
The centrifugal oil filter purifies the oil in the bypass flow (by centrifuging it). The cleaned oil returns to the oil
pan by gravity.
11 Pressure relief valve of lube
oil pump
12 Lube oil pump
13 Oil priming pump outlet
connection
14 Oil suction basket
15 Pressure limiting valve be-
fore engine
16 Vibration damper
17 Crankshaft support bearing,
free end
18 Crankshaft main bearing
19 Conrod bearings
20 Crankshaft axial bearings
MS15065/01E 2019-01 | Series 4000 Engines | 57
21 Crankshaft support bearing,
driving end
22 Mechanical coupling, gener-
al (option)
23 Camshaft bearing
24 Spray nozzles for piston
cooling
25 Shutoff valve
26 Cylinder head
27 Main oil gallery
28 Camshaft thrust bearings
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