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(8)  Stop the engine 
(9)  Do a test for oil leaks: S Remove the engine cowlings. S Look for oil leaks, specially around the connections to the oil cooler. S Install the engine cowlings.  Refer to Section 71-10. Refer to Section 71-10. 

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Oil System
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% Section 79-01 % Oil System - TAE 125 Diesel Engine % 1. General
% This Section tells you about the airframe parts of the engine oil system. These are the only parts that % you can replace except the oil filter. Refer to Chapter 72 for data about the oil filter.
% 2. Engine Oil System
% Figure 1 shows the oil system schematic diagram. Figure 2 shows the component locations. The % engine has the usual wet-sump lubrication system. The bottom part of the engine crankcase makes % the sump. An oil filler tube with a screw cap connects to the crankcase on the left of the engine.
% Two flexible hoses adjacent to the engine oil filter housing connect to the oil radiator. The oil radiator % is located below the engine at the back.
% The oil breather system has an oil pre-separator located on the engine crankcase adjacent to the oil % filler. A flexible hose connects the oil pre-separator to the oil separator. The oil separator is located % at the rear, left of the engine compartment. A flexible hose from the top of the oil separator vents % blow-by gases and any remaining oil mist overboard. A small flexible hose connects the bottom of the % oil separator to the engine sump.
% Breather Line Oil Separator Overboard Vent
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Oil Pre-Separator
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Oil Filler
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Catch Tank
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on Turbo-Charger
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Auxiliary Oil Pump
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Oil Radiator

% Figure 1: Oil System Schematic Diagram %
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Oil Thermostat Housing
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Oil Filler
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Combined
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Oil Pump
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Oil Temperature Sensor
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(behind Oil Filler)
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Oil Pressure Sensor
Oil Filter Housing Oil Return from Oil Radiator
Oil Supply to Oil Radiator

Overboard Vent
Oil Separator
Oil Return Line
Oil Pre-Separator Oil Radiator Breather Line
Figure 2: Oil System Component Locations
% An oil pump in the engine takes oil from the sump. The oil flows through a filter and oil thermostat to % the oil radiator. Air passing through the oil radiator cools the oil. The cool oil returns to the engine. Oil % galleries in the engine take the oil to all bearings. If the oil is colder than 80 °C, the oil thermostat % sends the oil directly to the engine oil galleries.
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Oil System
AMM

% Trouble-Shooting % 1. General
% The table below lists the defects you could have with the oil system. If you have the trouble detailed % in the Trouble column read across to the Possible Cause column. Then do the repair given in the % Repair column.
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Trouble  Possible Cause  Repair 
Engine oil temperature too high.  Air inlet to oil radiator blocked. Oil radiator matrix dirty/blocked. Oil radiator blocked internally. Low oil level.  Remove obstruction. Clean oil radiator matrix. Remove oil radiator and flush with clean engine oil. Replace oil radiator. Refill oil. Refer to Section 12-10. 
　
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