HARNESS AS-WIRING 1258263 - Caterpillar

Illustration 1 g00421798
Lubrication system schematic (1) Piston cooling jets (2) Main oil gallery in cylinder block (3) Engine oil pressure sensor (4) Oil flow to valve mechanism (5) Camshaft journals (6) Oil filter bypass valve (7) Main bearings (8) Signal line (9) Primary engine oil filter (10) Engine oil pump (11) Secondary oil filter (12) Oil cooler bypass valve (13) Engine oil cooler (14) Oil pan sump (15) High pressure relief valve (16) Oil pump bypass valve
Illustration 2 g00421818
Right side of engine (9) Primary engine oil filter (10) Engine oil pump (11) Secondary oil filter (not shown) (13) Engine oil cooler (17) Engine oil filler (18) Oil supply line to turbocharger (19) Oil drain line from turbochargerThe lubrication system supplies 110 °C (230 °F) filtered oil at approximately 275 kPa (40 psi) at rated engine operating conditions. Oil pump bypass valve (16) is controlled by the engine oil manifold pressure, rather than the oil pump pressure. The engine oil manifold pressure is independent of the pressure drop that is caused by the engine oil filter and the engine oil cooler.Oil cooler bypass valve (12) maintains the engine oil temperature to 110 °C (230 °F). High pressure relief valve (15), which is located in the filter base, protects the filters and other components during cold starts. The opening pressure of the high pressure relief valve is 695 kPa (100 psi). Secondary oil filter (11) is a five micron filter which filters five percent of the oil flow before returning the oil to the sump. The opening pressure of the oil filter bypass valve is 170 kPa (25 psi). Engine oil pressure sensor (3) is part of the engine protection system.The turbocharger cartridge bearings are lubricated by oil supply line (18) from the main oil gallery, and oil drain line (19) returns the oil flow to the sump. Oil Flow Through The Lubrication System
Illustration 3 g00421838
Oil flow through engine (1) Oil flow to the piston, piston cooling jets, valve mechanism, camshaft journals, crankshaft main bearings, and the turbocharger (2) Main oil gallery in cylinder block (3) Oil drains to sump (4) Cylinder block (5) Oil from engine oil cooler (6) High pressure relief valve (7) Oil from engine oil pump (8) Oil to engine oil cooler (9) Passage to primary engine oil filter (10) Filtered oil (11) Bypassed oil (12) Oil filter bypass valve (13) Passage to primary engine oil filter (14) Oil cooler bypass valve (15) Oil pump bypass valve (16) Oil pump bypass drain (17) Passages to secondary oil filterThe engine oil pump is mounted to the back of the front gear train on the lower right hand side of the engine. The engine oil pump is driven by an idler gear from the crankshaft gear. Oil is pulled from the sump through oil pump bypass valve (15) on the way to the engine oil cooler. The bypass valve controls the oil pressure from the engine oil pump. The engine oil pump can supply excess oil for the lubricating system. When