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CHAPTER 75 % COOLING
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AMM TABLE OF CONTENTS
CHAPTER 75 % COOLING
% Section 75-00 Air Cooling - Lycoming Engine
1.
General ..............................................1
2.
Description/Operation ...................................1
Maintenance Practices
1.
General ............................................201
2.
Remove/Install the Cooling Air Baffle......................201
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% Section 75-01 % Liquid Cooling - TAE 125 Diesel Engine % 1. General ..............................................1 % 2. Description............................................3 % 3. Operation.............................................4 % Trouble-Shooting % 1. General ............................................101 % Maintenance Practices % 1. General ............................................201 % 2. Remove/Install the Coolant Radiator ......................201 % 3. Remove/Install the Coolant Tank.........................204 % 4. Remove/Install the Cabin Heat Heat-Exchanger .............206 % 5. Fill and Bleed the Cooling System ........................208
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AMM
CHAPTER 75 % COOLING
% Section 75-00 % Air Cooling - Lycoming Engine
1. General
% This Section gives you the data for the air cooling system for airplanes with the Lycoming engine
% installed. It gives you the maintenance practices to remove/install the baffle. Refer to the Lycoming Maintenance Manual for data about the inter-cylinder cooling baffle. Figure 1 shows the air cooling baffle.
2. Description/Operation
The baffle controls the cooling air flow. Ram air enters the cooling baffle through the intake in the engine cowling. The front duct of the baffle sends the cooling air into the space over the top of the cylinders. Rivets attach a special rubber sealing strip to the top of the baffle. The rubber sealing strip makes a seal between the baffle and the inside of the top cowling. The air goes down between the cylinders and around the outside of the cylinders. The used air goes out from the bottom rear of the engine bay.
These items pass through rubber grommets in the cooling baffle:
) The propeller control cable.
) The mixture control cable.
) The fuel flow divider drain.
The cables for the top spark plugs of No’s 1 & 3 cylinders, go through a cable feed-thru in the rear of the baffle, on the right side. The cables for the top spark plugs of No’s 2 & 4 cylinder pass through holes in the left side of the baffle, at the top.
Screws attach the baffle to the cylinder head and tie-bars hold the baffle in position around the bottom of the cylinders.
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% Cooling AIRCRAFT AMM
Rubber Seal
Pop Rivet Washer
Seal Retaining Plate
Baffle
Left Rear Baffle
Right Front Baffle
Mixture Control
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