SHAFT AS 8E8552 - Caterpillar

References
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Illustration 1 g06301698Reference: For more information, refer to "C9.3 Tier 4 Final Engine Lubrication System" on Caterpillar Channel1.https://channel1.mediaspace.kaltura.com/media/C9.3+Tier+4+Final+Engine+Lubrication+System/1_23w1vefv
System Operation
Illustration 2 g01950413
Lubrication system schematic
(1) Passage to the rocker arms
(2) Cylinder head gallery
(3) Passage to pushrod lifters
(4) Piston cooling jets
(5) Oil supply line for the fuel pump
(6) Oil supply line for the air compressor
(7) Main bearings
(8) Camshaft bearings
(9) Main oil gallery
(10) Turbocharger oil supply line
(11) Supply for the number 4 main bearing
(12) Passage to camshaft idler gear bearing
(13) Oil filter bypass valve
(14) Passage
(15) Oil cooler bypass valve
(16) Engine oil filter
(17) Engine oil cooler
(18) Auxiliary engine oil filter (if equipped)
(19) Engine oil pump
(20) Oil pump bypass valve
(21) Engine oil panEngine oil pump (19) is mounted to the bottom of the cylinder block inside