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 GENERATOR DRIVE OIL COOLER - REMOVAL/INSTALLATION
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 1.  General
_______
 A.  This procedure contains two tasks. The first task is the removal of the generator drive oil cooler. The second is the installation and test of the generator drive oil cooler.
 B.  The generator drive oil cooler is installed near the oil tank on the lower aft area of the engine fan case.
 NOTE: Do the oil cooler inspection in AMM 71-00-58/101 to check
____
 for FOD before you replace the cooler.

 TASK 24-11-21-004-001
 2.  Generator Drive Oil Cooler Removal (Fig. 401)
__________________________________
 A.  References
 (1)  
AMM 78-31-00/201, Thrust Reverser System

 B.  
Access

 (1)  
Location Zone
 504 Engine No. 1, LH
 505 Engine No. 1, RH
 604 Engine No. 2, LH
 605 Engine No. 2, RH

 (2)  
Access Panel
 5738L Thrust Reverser Cowl Assembly
 5738R Thrust Reverser Cowl Assembly
 5739L Thrust Reverser Cowl Assembly
 5739R Thrust Reverser Cowl Assembly

 C.  
Procedure

 S 014-002
 (1)  
Open the right fan duct cowl and thrust reverser half (AMM 78-31-00/201).

 S 874-021

 (2)  
AIRPLANES WITH A VSCF GENERATOR/CONVERTER; Release the pressure in the VSCF Generator/Converter oil system.

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 ALL  ú ú 02 Page 401 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

OIL TANK (REF) 
GENERATOR DRIVE  FWD 
OIL COOLER AND TUBING 
SEE  A 

OIL COOLER
SEE B
FAN
CASE

TUBING SEE C
VIEW TOWARDS AFT
A
Generator Drive Oil Cooler Installation Figure 401 (Sheet 1)
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 ALL  ú ú 01 Page 402 ú Jul 15/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

B

Generator Drive Oil Cooler Installation
Figure 401 (Sheet 2)

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 24-11-21
 ALL  ú ú 01 Page 403 ú Jun 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
OIL TANK 
(REF) 
TEE-FITTING 
OIL COOLER 
INLET HOSE 
OIL FILTER 
(REF) 
OIL COOLER 
OUTLET LINE 

FWD
C
Generator Drive Oil Cooler Installation
Figure 401 (Sheet 3)

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 ALL  ú ú 01 Page 404 ú Jun 25/84
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 WARNING:_______REMOVE THE OVERFILL DRAIN FITTING SLOWLY. HOT GAS OR OIL CAN COME OUT WHEN THE ENGINE IS HOT. HOT GAS OR OIL CAN BURN YOU.
 (a)  
Remove the overfill drain fitting.

 (b)  
Remove the pressure-fill valve.

 S 874-020
 (3)  AIRPLANES WITH A CONSTANT SPEED DRIVE;
 Release the pressure in the CSD oil system.

 (a)  Push the vent valve cap on the top of the CSD to remove the internal pressure.
 S 034-003
 (4)  Remove the union from the oil-in port:
 (a)  
Remove the hose from the oil-in port on the oil cooler.
　
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