2.
Description/Operation ......................................... 1
Trouble-Shooting
1. General .................................................. 101
Maintenance Practices
1.
General .................................................. 201
2.
Remove/Install the Oil Cooler ................................. 201
3.
Remove/Install the Oil Filter .................................. 205
DA 40 Series AMM
DA 40 F
DA 40 F
The title of Section 79-00 is amended to read:
Section 79-00 % Oil System - Lycoming IO-360-M1A Engine
DA 40 Series AMM
DA 40 F
Intentionally left blank
DA 40 F
Section 79-02
Oil System - Lycoming O-360-A4M Engine
1. General
The O-360-A4M engine installed in the DA 40 F has the usual wet-sump oil system. The oil system has an oil cooler. The oil cooler attaches to brackets on the engine-mounting-frame. The oil system also has a temperature indicator. The indicator is part of the integrated-engine-instrument-display. For more data about the indication system refer to Section 77-42.
For more data on the oil system refer to the Lycoming Maintenance Manual.
2. Description/Operation
Figure 1 shows the schematic diagram for the oil system.
Oil is stored in the engine sump. Oil goes into the oil pump through an internal oil-way in the sump. The inlet to the oil-way has a strainer. The outlet of the oil pump flows to the thermostatic oil by-pass valve. When the oil is at normal operating temperature oil will flow through a flexible hose to the oil cooler. When the oil is cold the thermostatic by-pass valve sends the oil directly to the oil filter.
The oil filter has a by-pass valve. The by-pass valve is normally closed. If the oil filter becomes blocked the by-pass valve will open and oil will flow to the pressure regulating valve. From the oil pressure regulating valve the oil flows around the engine and back to the sump.
DA 40 Series AMM
Figure 1: Oil System Schematic Diagram
DA 40 F
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.
Trouble Possible Cause Repair
Engine oil temperature too high. Air inlet/flexible hoses to oil cooler blocked. Oil cooler matrix dirty/blocked. Oil cooler blocked internally. Remove obstruction. Clean oil cooler matrix. Remove oil cooler and flush with clean engine oil. Replace oil cooler.
DA 40 Series AMM
DA 40 F
Intentionally left blank
DA 40 F
Maintenance Practices
1. General
These maintenance practices tell you how to remove/install the oil cooler. For more data on the oil system refer to the Lycoming Maintenance Manual.
2. Remove/Install the Oil Cooler
WARNING: DO NOT GET OIL ON YOU. OIL CAN CAUSE SKIN DISEASE.
CAUTION: ALWAYS PUT A CAP ON OPEN CONNECTIONS. IF YOU DO NOT PUT A CAP ON OPEN CONNECTIONS, THEN CONTAMINATION CAN GET INTO THE SYSTEM AND CAUSE DAMAGE.
CAUTION: DO NOT MIX OIL TYPES. IF YOU MIX OIL TYPES THE OIL CAN LOSE
ITS PROPERTIES AND THE ENGINE WILL WEAR MORE QUICKLY.
A. Remove the Oil Cooler
Detail Steps/Work Items Key Items/References
WARNING: MAKE SURE THE ENGINE IS SAFE BEFORE YOU DO ANY WORK ON THE OIL SYSTEM. IF THE ENGINE STARTS THE PROPELLER CAN CAUSE INJURY OR DEATH.
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