SHAFT AS 2330668 - Caterpillar

Illustration 1 g00827644
Lubrication system schematic
Illustration 2 g00292619
Lubrication system components (1) Temperature regulator housing (2) Main engine oil gallery (3) Piston cooling jets (4) Drilled passage in the cylinder block from the main engine oil gallery to the camshaft bearings (5) Supply line for engine oil to the turbocharger (6) Turbochargers (7) Engine oil cooler (8) Drain lines for the engine oil from the turbochargers (9) Engine oil filters (10) Drilled passage in the cylinder block from the main engine oil gallery to the crankshaft main bearings (11) Valve for the engine oil filters (12) Priority valve (13) Suction tube (14) Prelube pump (15) Engine oil pump (16) Suction bell (17) Engine oil panPrelube pump (14) can be driven by an electric motor or an air motor. The prelube pump provides engine oil in order to lubricate the engine bearings before the engine is started and after the engine is shut down. The engine control will not allow the engine to start until the prelubrication has provided the minimum amount of lubrication to the engine. A check valve is located in the line between the prelube pump and the engine oil manifold. The check valve prevents pressurized engine oil from the engine oil pump from going through the prelube pump after the engine is started.Engine oil pump (15) is mounted on the front left side of the front housing. The engine oil pump pulls engine oil from the pan through suction bell (16) and elbow (15). The suction bell has a screen in order to strain the engine oil.The engine oil pump has a relief valve. If the pressure from the pump reaches 1000 kPa (145 psi), the relief valve opens and some of the engine oil returns to the engine oil pan. This helps prevent damage to the lubrication system components when the engine oil is cold.Engine oil is pumped to the ports on the bypass valve of priority valve (12). If the pressure in the main oil gallery becomes excessive, the bypass valve opens in order to divert the engine oil back to the engine oil pan.
Illustration 3 g00292624
(1) Temperature regulator housing (7) Engine oil coolersThe engine oil is pumped to temperature regulator housing (1). The temperature regulators and engine oil coolers (7) maintain the engine oil temperature. The core assemblies in the engine oil cooler are connected in parallel with the aftercooler. Water flows through the inside of the tubes in the bundle of the engine oil coolers. If the engine oil temperature is higher than 85 °C (185 °F), the flow is directed to the engine oil coolers. Engine oil flows from the engine oil coolers through valve (11) to engine oil filters (9) . At cooler oil temperatures, the engine oil bypasses the engine oil coolers and the engine oil flows directly to the engine oil filters.
Illustration 4 g00825761
(9) Engine oil filter housing (11) Valve for the engine oil filtersEach engine oil filter housing (9) contains three engine oil filter elements. Each housing has a port in order