GLASS 2956652 - Caterpillar

Illustration 1 g02647096
Schematic of the engine lubrication system
(1) Engine oil filters
(2) Engine block
(3) Auxiliary water pump
(4) Turbocharger
(5) Bypass valve for the engine oil filter
(6) Front gear train
(7) Engine oil cooler bypass valve
(8) Pressure relief valve for the engine oil pump
(9) Engine oil pan
(10) Engine oil cooler
(11) Engine oil pump
(12) Suction screen Engine oil pump (11) is a gear-type pump that generates pressure for the engine lubrication system. The engine oil pump is bolted to the bottom of engine block (2) inside the engine crankcase toward the front of the engine. The pump gears are driven by front gear train (6). Oil is drawn into the inlet of the pump through suction screen (12) into a suction tube that is connected to the oil pump.Pressure relief valve (8) is internal to the engine oil pump. The pressure relief valve controls the engine oil pressure to a maximum of 675 55 kPa (98 8 psi). Excess engine oil that is bypassed by the oil pump is returned to engine oil pan (9). The pressurized oil is directed through engine oil cooler (10). The engine oil cooler lowers the temperature of the engine oil before the engine oil is filtered. If the oil cooler becomes restricted, engine oil cooler bypass valve (7) allows engine oil to bypass the oil cooler. When the pressure differential across the oil cooler exceeds 255 kPa (37 psi), engine oil will bypass the oil cooler. The oil cooler is mounted to the right side of the engine. The pressure relief valve is located in the oil filter base.Engine oil filters (1) are used to clean the engine oil. If the oil filters become restricted, engine oil filter bypass valve (5) allows engine oil to bypass the oil filter. When the pressure differential across the oil filter exceeds 255 kPa (37 psi), engine oil will bypass the oil filter. Spin-on oil filters are used for this engine. The filters are located on the right side of the engine. The pressure relief valve is located in the oil filter base. The oil enters the main oil gallery in the engine block and is distributed among the various passages that feed the required components.Ports and passages are drilled in the cylinder block to supply oil to front gear train (6), auxiliary water pump (3), and turbocharger (4).
Illustration 2 g02647246
Lubrication system schematic
(13) Plugged oil ports
(14) Oil port for the turbocharger supply
(15 - 16 - 17) Passages for the valve lifters and rocker arm shafts
(18) Camshaft bearing journal
(19) Oil port for the auxiliary water pump
(20) Piston cooling jet
(21) Port for the inlet to the main oil gallery from the oil cooler
(22) Crankshaft main bearing journal
(23) Bearing