Engine Without BrakeSaver
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| Illustration 1 | g00291430 |
Lubrication System Components (Typical Example) (1) Oil supply line to turbocharger (2) Oil return line from turbocharger (3) Oil cooler (4) Oil manifold in cylinder block (5) Oil filter (6) Oil pan | |
The lubrication system has the following components:
- oil pan
- oil pump
- oil cooler
- oil filter
- turbocharger oil lines
- oil passages for the cylinder block
Oil Flow Through The Oil Filter And Oil Cooler
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| Illustration 2 | g00291431 |
Oil flow when the engine is warm. (1) Oil manifold in cylinder block (2) Oil supply line to turbocharger (3) Oil return line from turbocharger (4) Oil filter (5) Bypass valve for the oil filter (6) Oil pan (7) Oil pump (8) Bypass valve for the oil cooler (9) Suction bell (10) Oil cooler | |
When the engine is warm, oil comes from the oil pan (6) through the suction bell (9) to the oil pump (7). The oil pump sends warm oil to the oil cooler (10). The oil is then sent to the oil filter (4). Oil from the oil filter is sent to the oil manifold (1) in the cylinder block and to the oil supply line (2) for the turbocharger. Oil from the turbocharger goes back through the oil return line (3) to the oil pan.
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| Illustration 3 | g00291433 |
Oil Flow When The Engine Is Cold. (1) Oil Manifold (2) Oil supply line (3) Oil return line (4) Oil filter (5) Bypass valve for the oil filter (6) Oil pan (7) Oil pump (8) Bypass valve (9) Suction bell (10) Oil cooler | |
When the engine is cold, oil comes from the oil pan (6) through the suction bell (9) to the oil pump (7). When the oil is cold, an oil pressure difference in the bypass valves also causes the bypass valves to open. These bypass valves then provide immediate lubrication to all of the engine components when cold oil with high viscosity causes a restriction to the oil flow through the oil cooler (10) and the oil filter (4). The oil pump then sends the cold oil through the bypass valve (8) for the oil cooler and through the bypass valve (5) for the oil filter. The oil then goes to the oil manifold (1) in the cylinder block and to the supply line (2) for the turbocharger. Oil from the turbocharger goes back through the oil return line (3) to the oil pan.
When the oil is warm, an oil pressure difference in the bypass valves also causes the bypass valves to close. There is normal oil flow through the oil cooler and the oil filter.
The bypass valves will also open when there is a restriction in the oil cooler or the oil filter. This prevents a restricted oil filter or a restricted oil cooler from stopping the lubrication of the engine.
Engines With BrakeSaver
The lubrication system has the following components:
- oil pan
- two-section oil pump
- oil cooler
- oil filter
- turbocharger oil lines
- oil passages for the cylinder block
The front section of the oil pump supplies oil for lubrication of the engine. The rear section of the oil pump supplies oil for the operation of the BrakeSaver. The front section of the oil pump sends oil through the oil filter. The rear section of the oil pump sends oil through the oil cooler.
Oil Flow through The Oil Filter
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| Illustration 4 | g00291435 |
Oil Flow When The Engine Is Warm. (1) Oil manifold (2) Oil supply line (3) Oil return line (4) Oil filter (5) Bypass valve (6) Oil pan (7) The front section of the oil pump (8) Suction bell | |
When the engine is warm, oil comes from the oil pan (6) through the suction bell (8) to the front section of the oil pump (7). The front section of the oil pump sends oil to the oil filter. The oil from the oil filter is sent to the oil manifold (1) in the cylinder block and to the oil supply line (2) for the turbocharger. Oil from the turbocharger goes back through the oil return line (3) to the oil pan.
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| Illustration 5 | g00291438 |
Oil Flow When The Engine Is Cold. (1) Oil manifold (2) Oil supply line (3) Oil return line (4) Oil filter (5) Bypass valve (6) Oil pan (7) The front section of the oil pump (8) Suction bell | |
When the engine is cold, oil comes from the oil pan (6) through the suction bell (8) to the front section of the oil pump (7). When the oil is cold, an oil pressure difference in the bypass valve (5) causes the valve to open. The bypass valve provides immediate lubrication to all components when cold oil with high viscosity causes a restriction to the oil flow through the oil filter (4). The front section of the oil pump sends the cold oil through the bypass valve (5) for the oil filter. The oil from the oil filter is sent to the oil manifold (1) in the cylinder block and to the oil supply line (2) for the turbocharger. Oil from the turbocharger goes back through the oil return line (3) to the oil pan.
When the oil is warm, an oil pressure difference in the bypass valves also causes the bypass valves to close. There is normal oil flow through the oil filter.
The bypass valves will also open when there is a restriction in the oil filter. This prevents a restricted oil filter from stopping the lubrication of the engine.
Oil Flow Through The Oil Cooler
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| Illustration 6 | g00291440 |
Oil Flow When The Engine Is Warm And The BrakeSaver Is Off. (1) Oil Cooler (2) Bypass valve (3) BrakeSaver control valve (4) BrakeSaver (5) The rear section of the oil pump (6) Oil pan (7) Suction bell | |
When the engine is warm, oil comes from the oil pan (6) through the suction bell (7) to the rear section of the oil pump (5). The rear section of the oil pump sends oil to the BrakeSaver control valve (3). When the BrakeSaver is in the off position, oil is sent to the oil cooler (1). The oil cooler cools the warm oil. The cool oil from the oil cooler goes back through the BrakeSaver control valve to the oil pan.
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| Illustration 7 | g00291441 |
Oil Flow When The Engine Is Warm And The BrakeSaver Is On. (1) Oil cooler (2) Bypass valve (3) BrakeSaver control valve (4) BrakeSaver (5) The rear section of the oil pump (6) Oil pan (7) Suction bell | |
When the BrakeSaver control valve (3) is ON, the oil from the BrakeSaver control valve is now sent to the BrakeSaver (4). When the oil goes through the BrakeSaver, the oil is sent back to the BrakeSaver control valve. The control valve sends the warm oil to the oil cooler (1). The oil cooler cools the warm oil. The cool oil from the oil cooler goes back through the BrakeSaver control valve to the oil pan (6).
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| Illustration 8 | g00291442 |
Oil Flow When The Engine Is Cold And The BrakeSaver Is Off. (1) Oil cooler (2) Bypass valve (3) BrakeSaver control valve (4) BrakeSaver (5) The rear section of the oil pump (6) Oil pan (7) Suction bell | |
The oil has a high viscosity when the engine is cold. The high viscosity causes a restriction to the oil flow through the oil cooler (1). When the oil is cold, an oil pressure difference in the bypass valve (2) causes the valve to open. When the bypass valve is open, the oil from the rear section of the oil pump (5) can go through the valve. The oil then drains back into the engine oil pan (6) .
Oil Flow In The Engine
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| Illustration 9 | g00520602 |
Engine Oil Flow Schematic (1) Bracket for rocker arm shaft (2) Rocker arm shaft (3) Oil passage to lifters (4) Valve lifter bore (5) Oil supply rocker shaft bracket (6) Rocker arm shaft (7) Oil supply rocker shaft bracket (8) Oil passage to accessory drive (air compressor) (9) Oil passage to rocker shaft bracket and accessory drive (10) Oil passage to idler gear shaft (11) Oil passage to rocker shaft bracket (12) Oil passage to the fuel injection pump housing (13) Camshaft bearing (14) Oil jet tubes (15) Main bearing (16) Oil manifold (17) Oil passage from the oil pump to the oil cooler and filter (18) Oil passage from the oil cooler and filter | |
From oil manifold (16), oil is sent through drilled passages in the cylinder block that connect main bearings (15) and camshaft bearings (13). Oil goes through drilled holes in the crankshaft in order to give lubrication to the connecting rod bearings. A small amount of oil is sent through piston cooling jets (14) in order to cool the pistons. Oil goes through grooves in the bores for the front and rear camshaft bearings. The oil then flows through passages (3) that connect the valve lifter bores (4). These passages give oil under pressure for the lubrication of the valve lifters.
Oil is sent from lifter bores (4) through passage (11) to an oil passage in bracket (5). The oil supplies pressure lubrication to rear rocker arm shaft (2). Oil is sent from the front main bearing bore through passage (9) to an oil passage in front bracket (7) for front rocker arm shaft (6). Holes in the rocker arm shafts allow the oil to lubricate the valve system components in the cylinder head.
The air compressor receives oil from passage (8) in the cylinder block, through passages in the timing gear housing and the accessory drive gear.
The idler gear gets oil from passage (10) in the cylinder block through a passage in the idler gear shaft installed on the front of the cylinder block.
The fuel injection pump housing gets oil from passage (12) in the cylinder block. The automatic timing advance unit receives oil from the fuel injection pump through a passage in the fuel injection pump camshaft.
There is a pressure control valve in the oil pump. This valve controls the pressure of the oil that is coming from the oil pump. The oil pump supplies a greater quantity of oil into the system. This extra quantity of oil is not needed by the system. The extra quantity of oil will cause the pressure to rise and the valve will open. This allows the oil that is not needed to go back to the inlet oil passage of the oil pump.
After the oil has finished lubricating, the oil returns to the engine oil pan.