HOSE AS 3270730 - Caterpillar

Illustration 1 g01081151
Lubrication system schematic
(1) Jumper block
(2) Passage to rocker arms
(3) High pressure oil gallery
(4) High pressure oil line
(5) Variable displacement hydraulic pump
(6) Low pressure oil gallery for the fluid manifold
(7) Oil supply line for the hydraulic pump
(8) passage for the oil manifold
(9) Camshaft bearings
(10) Turbocharger oil supply line
(11) Passage to front housing
(12) Main oil gallery
(13) Passage to pushrod lifters
(14) Extension for the oil gallery
(15) Oil filter bypass valve
(16) Main bearings
(17) Front idler gear bearing
(18) Piston cooling jets
(19) Auxiliary oil filter (if equipped)
(20) Oil cooler bypass valve
(21) Oil filter
(22) Oil pan
(23) Oil cooler
(24) Oil pump
(25) Oil pump bypass valve Note: Some applications may have a remote oil filter. The remote oil filter can be located on either the right or left side of the engine. Also, some applications may have two turbochargers.The oil pump (24) is mounted to the bottom of the cylinder block within the oil pan (22). The oil pump (24) pulls oil from the oil pan (22). The oil then flows through a passage to the oil cooler (23). Oil then flows through the oil filter (21). The oil enters the main oil gallery (12).The main oil gallery (12) distributes oil to the main bearings (16), the piston cooling jets (18), the camshaft bearings (9), the turbocharger supply line (10), and the front idler gear bearings (17). The main oil gallery (12) also distributes oil to the rear gears, if equipped. Oil from the main oil gallery (12) exits the front of the block. The oil enters a passage that is cast into the front housing.Oil enters the crankshaft through holes in the bearing surfaces (journals) for the main bearing (16). Passages connect the bearing surface (journal) for the main bearing (16) with the bearing surface (journal) for the connecting rod.The front housing passage sends the oil flow up to the hydraulic electronic unit injector (HEUI) pump.The extension for the oil gallery (14) is located in the front right corner of the engine block. The extension for the oil gallery (14) supplies oil to the front idler gear bearing (17).The passages send oil from the front and rear camshaft bearings (9) to an oil passage in the engine block. The oil then enters a passage to the pushrod lifters (13). This oil lubricates the lifter roller bearings.The pump for the Hydraulic Electronic Unit Injection (HEUI) (5) is an axial piston pump that is driven by a gear. The HEUI pump increases the level of engine oil pressure to the level of actuation pressure that is required by the unit injectors. The injection actuation pressure control valve is internal to the HEUI pump. The injection actuation pressure control valve electronically controls the output pressure of the HEUI pump (5).The oil circuit consists of a low pressure section and a high pressure section. The low pressure circuit typically operates at a pressure of 240 to 480 kPa (35 to 70 psi). The low pressure circuit provides filtered engine oil to the HEUI pump (5). The low pressure circuit