3B2-05105-0 Tohatsu STARTER CASE

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 panThe lubrication system has the following components:
oil pan
oil pump
oil cooler
oil filter
turbocharger oil lines
oil passages for the cylinder blockOil Flow Through The Oil Filter And Oil Cooler
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 coolerWhen 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.
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 coolerWhen 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 blockThe 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
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 bellWhen 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.
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 bellWhen 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
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 bellWhen 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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