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WIRING GP 4416504 - Caterpillar



4416504 WIRING GP Caterpillar parts WIRING
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26
Alternative (cross code) number:
CA4416504
441-6504
4416504
Caterpillar 4416504 WIRING GP

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Illustration 1 g01448759
Lubrication system schematic
(1) Unit injector hydraulic pump
(2) High pressure relief valve
(3) Passage to the rocker arms
(4) High pressure oil line
(5) High pressure oil manifold
(6) Passage from high pressure oil manifold to injector
(7) Oil supply line for unit injector hydraulic pump
(8) Piston cooling jets
(9) Cylinder head gallery
(10) Passage to pushrod lifters
(11) Main bearing
(12) Camshaft bearing
(13) Passage to engine oil pan
(14) Main oil gallery
(15) Turbocharger oil supply line
(16) Passage to front housing
(17) Passage to oil pump idler gear bearing
(18) Oil filter bypass valve
(19) Passage to camshaft idler gear bearing
(20) Passage
(21) Engine oil filter
(22) Oil cooler bypass valve
(23) Engine oil cooler
(24) Engine oil pump
(25) Oil pump bypass valve
(26) Auxiliary engine oil filter (if equipped)
(27) Engine oil pan Engine oil pump (24) is mounted to the bottom of the cylinder block inside the engine oil pan (27). The engine oil pump (24) pulls oil from engine oil pan (27). The engine oil pump pushes the oil through the passage to the engine oil cooler (23). Oil then flows through engine oil filter (21). The filtered oil then enters the turbocharger oil supply line (15) and main oil gallery (14).The main oil gallery (14) distributes oil to main bearings (11), piston cooling jets (8), and camshaft bearing (12). Oil from main oil gallery (14) exits the front of the block. The oil then enters a groove that is cast in front housing (16).Oil enters the crankshaft through holes in the bearing surfaces (journals) for the main bearing (11). Passages connect the bearing surface (journal) for the main bearing (11) with the bearing surface (journal) for the connecting rod.The passage in front housing (16) sends the oil flow in two directions. At the upper end of the passage, oil is directed back into the block and up to cylinder head gallery (9) through passage (3) to the rocker arm mechanism. A passage (17) sends oil to the oil pump idler gear bearing.Oil from the front main bearing enters a passage (19) to the camshaft idler gear bearing. Oil passages in the crankshaft send oil from all the main bearings (11) through the connecting rods to the connecting rod bearings.The passages send oil from the camshaft bearing (12) to an oil passage in the side covers. The oil then enters a hole in the shafts to pushrod lifters (10). The oil lubricates the bearings of the lifter.Note: Engines that are equipped with an auxiliary oil filter (26) will receive oil at a port. The filtered oil will be returned to engine oil pan (27).The unit injector hydraulic pump (1) is a gear-driven axial piston pump. The unit injector hydraulic pump raises the engine oil pressure from the typical operating oil pressure to the actuation pressure that is required by the unit injectors. The injection actuation pressure control valve (5) electronically controls the output pressure of the unit injector hydraulic pump (1).The oil circuit consists of a low pressure circuit and a high pressure circuit. The low pressure circuit typically operates at a pressure of

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