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A 757 MAINTENANCE MANUAL
IDG AIR/OIL HEAT EXCHANGER
RAM
IDG HEAT EXCHANGER ACTUATION RAM
SEE A
BOLT, NUT, 
AND WASHER 
FORK END 
KEY WASHER 
LOCKNUT 
INSPECTION 
HOLE 
LOCKNUT 
BOLT, NUT, 
AND WASHER 
KEY WASHER 
VANE CLOSED 
RIG PIN 
POSITION 
VANE OPEN 
RIG PIN 
POSITION 

IDG HEAT EXCHANGER ACTUATION RAM
A

A9832 IDG Air/Oil Heat Exchanger Actuator Ram Adjustments Figure 403
A76213
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A

757 MAINTENANCE MANUAL
 S 014-006 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______
 THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS INJURY
 TO PERSONS OR DAMAGE TO EQUIPMENT COULD OCCUR.
 (2)  Open the thrust reverser (AMM 78-31-00/201).
 S 014-004
 (3)  Open the fan cowl panels (AMM 71-11-04/201).
 S 864-008
 (4)  Remove the pressure, from the oil cooling system of the IDG:
 (a) Remove the cover, from the overflow drain coupling of the IDG.
 (b) Put the container below the IDG to catch the oil.
 (c) Put the end of the overflow drain hose into the container.
 WARNING: BE CAREFUL WHEN YOU CONNECT THE OVERFLOW DRAIN HOSE._______
 PRESSURE IN THE IDG CAN CAUSE HOT OIL TO COME OUT OF THE
 COUPLING. HOT OIL CAN CAUSE INJURY TO PERSONS.
 (d) Connect the overflow drain hose, to the overflow drain coupling
 on the IDG.
 1) Let the oil flow into the container.
 (e) Remove the overflow drain hose.
 (f) Install the cover, on the overflow drain coupling of the IDG.
 S 684-007
 (5)  Drain the oil from the IDG:
 WARNING: BE CAREFUL WHEN YOU DRAIN THE IDG OIL. WEAR THE_______
 PROTECTION GEAR. HOT OIL CAN CAUSE INJURY.
 (a) Remove the case drain plug and the O-ring from the IDG.
 1) Let the oil flow from the IDG into the container.
 2) Discard the used O-ring.

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A

757 MAINTENANCE MANUAL
 (b)  
Lubricate a new O-ring with Acyloid.

 (c)  
Install the new O-ring on the case drain plug.

 (d)  
Install the case drain plug.

 (e)  
Tighten the case drain plug to 55-75 pound-inches.

 (f)  
Lock the case drain plug with a wire.

 S 014-009
 (6)  Remove the outlet air duct:
 (a)  
Remove the bolt (1), the nut (2), and the washer (3) which attach the top duct support to the heat exchanger. 1) Keep the bolt (1), the nut (2), and the washer (3) for the

 installation.

 (b)  
Remove the bolt (1), the nut (2), and the washer (3) which attach the bottom duct support to the heat exchanger. 1) Keep the bolt (1), the nut (2), and the washer (3) for the

 installation.

 (c)  
AIRPLANES WITH RB211 ENGINES (POST-RR-SB 24-9280); Remove the bolt, nut, and the washer that attach the link assembly to the vane crank.

 (d)  
Remove the 9 bolts (5), and the 4 nuts (4) which hold the outlet air duct to the firewall. 1) Keep the bolts (5) and the nuts (4) for the installation.

 (e)  
Remove the outlet air duct from the engine.
　
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