ENGINE SYSTEMS 37
Engine Lubrication System
Lubrication System Components and Oil Flow
Figure 32 Lubrication system
1. Unfiltered oil
2. Cooled unfiltered oil
3. Filtered oil
4. Secondary filtration filter
(optional)
5. Gerotor oil pump
6. Front cover
7. Reservoir for high-pressure oil
pump
8. Pick-up tube
9. Unfiltered oil gallery
10. Variable Geometry Turbocharger
(VGT)
11. Oil cooler
12. Oil filter
13. Oil cooler / filter header
assembly
14. Oil pressure regulator relief
valve
15. Regulator relief valve drain to
crankcase
16. Oil pan assembly
17. Crankshaft
18. Piston cooling jet (6)
19. Main filtered oil gallery
20. Camshaft
21. Crankcase
22. Vertical gallery
23. Cylinder head
24. Valve cover
25. Rocker arm assembly
26. Air compressor
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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