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757 
MAINTENANCE MANUAL 
TAP RING 
HERE 
1.75 INCH 
(44.45 mm)  LOCKWIRE 
0.562 INCH 
(14.28 mm) 
ALIGNMENT 
MARK 
INDEX  ALIGNMENT 
PIN HOLE  MARK 
QAD RING SHOWN 
IN CLOSED POSITION 
TAP RING 
QAD RING SHOWN  ALONG THIS 
IN OPEN POSITION  AREA 
QAD TENSION  B 
BOLT  SPLINE 
6. O-RING 
C 

8. CASE DRAIN PLUG POUND-INCHES) (TIGHTEN TO 55-75 
OUTBD  FWD  7. O-RING  RELIEF LINE THERMAL ESEE  11. O-RING  (TIGHTEN TO 230 POUND-INCHES) 14. BOLT 
D 
THERMAL RELIEF LINE 
E 

Integrated Drive Generator Installation
Figure 401 (Sheet 2)

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757 MAINTENANCE MANUAL
 (b)  6B6, R GEN DRIVE DISC
 S 014-009
 (2)  Open the fan cowl panels (AMM 71-11-04/201).
 E. Procedure
 S 864-010
 (1)  Remove the pressure from the IDG cooling system as follows:
 (a)  
If the IDG has a Push-To-Vent button, push the button to release pressure in the IDG.

 (b)  
Put the container under the IDG to catch oil.

 (c)  
Remove the cover from the overflow drain coupling.

 (d)  
Put the end of the drain hose in the container.

 WARNING:_______USE CARE WHEN YOU CONNECT THE DRAIN HOSE. PRESSURE IN THE IDG CAN CAUSE HOT OIL TO COME OUT. HOT OIL CAN CAUSE SERIOUS INJURY.

 (e)  
Connect the overflow drain hose to the overflow drain coupling. Allow the surplus oil to flow into the container.

 (f)  
Remove the overflow drain hose.

 S 684-011
 (2)  Drain the IDG cooling oil as follows:
 (a)  
Put the container under the IDG to catch oil.

 (b)  
Remove the wire which locks the case drain plug.

 WARNING:_______USE CARE WHEN YOU DRAIN THE IDG OIL. WEAR SPLASH GOGGLES, INSULATED GLOVES AND PROTECTION GEAR. CONTACT WITH HOT OIL CAN CAUSE SERIOUS INJURY.

 (c)  
Remove the case drain plug (8) and the O-ring (7).

 (d)  
Allow the oil to flow from the IDG into the container.

 (e)  
Discard the O-ring (7).

 (f)  
Lubricate and install a new O-ring (7) on the case drain plug (8).

 (g)  
Install the case drain plug (8). Tighten to 55-75 pound-inches (6.21-8.47 Newton-meters).

 (h)  
Install a lockwire on the case drain plug (8) if you plan to re-install this IDG.

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MAINTENANCE MANUAL

 S 034-012
 (3)  Remove the electrical connectors as follows:
 (a)  
Remove the two IDG electrical connectors.

 (b)  
Install protective caps on the IDG and ship side electrical connectors.

 S 034-013
 (4)  Remove the phase leads from the IDG as follows:
 (a)  
Remove the two screws (1) and the two washers (2) which attach the terminal block cover (3) to the IDG.

 (b)  
Remove the terminal block cover (3) from the IDG.

 (c)  
Remove the spiralock nuts (4), the self-locking nuts, or the terminal nuts and washers which are installed on the terminal studs.

 (d)  
Remove the four phase leads and identify the leads for subsequent installation.

 (e)  
Install the spiralock nuts (4), the self-locking nuts, or the washers and terminal nuts on the terminal studs (tighten by hand).
　
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