STRAP 5L1051 - Caterpillar

Engine oil pump (25) is mounted to the bottom of the cylinder block inside the engine oil pan (28) . The engine oil pump (25) pulls oil from engine oil pan (28) . The engine oil pump pushes the oil through the passage to the engine oil cooler (24) . Oil then flows through engine oil filter (22) . The filtered oil then enters the turbocharger oil supply line (16) and main oil gallery (15) .
Illustration 2 g00423026
Right Side View Of Engine (16) Turbocharger oil supply line. (19) Oil filter bypass valve. (22) Engine oil filter. (23) Oil cooler bypass valve. (24) Oil cooler. (29) Turbocharger oil return tube.
Illustration 3 g00423028
Left Side View of Engine (1) Hydraulic pump. (5) Oil supply line (high pressure). (7) Oil manifold (high pressure). (8) Oil supply line (hydraulic pump).The main oil gallery (15) distributes oil to main bearings (12) , piston cooling jets (9) , and camshaft bearing (13) . Oil from main oil gallery (15) exits the front of the block. The oil then enters a groove that is cast in the front housing.Oil enters the crankshaft through holes in the bearing surfaces (journals) for the main bearing (12) . Passages connect the bearing surface (journal) for the main bearing (12) with the bearing surface (journal) for the connecting rod.The front housing passage 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 (10) through passage (3) to the rocker arm mechanism. A passage (18) sends oil to the oil pump idler gear bearing.Oil from the front main bearing enters a passage (20) to the camshaft idler gear bearing. Oil passages in the crankshaft send oil from all the main bearings (12) through the connecting rods to the connecting rod bearings.The passages send oil from the camshaft bearing (13) to an oil passage in the side covers. The oil then enters a hole in the shafts to pushrod lifters (11) . The oil lubricates the bearings of the lifter.Note: Engines that are equipped with an auxiliary oil filter (27) will receive oil at a port. The filtered oil will be returned to engine oil pan (28) .The hydraulic pump (1) is a gear-driven axial piston pump. The 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 (6) electronically controls the output pressure of the hydraulic pump (1) .The oil circuit consists of a