(c)  
Remove the switch, O-ring, and backup ring from the oil tank.

 NOTE: Keep the backup ring for the installation with the
____ replacement switch.
 1)  Discard the O-ring.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
FWD
BRACKET ELECTRICAL
PLUG RECEPTACLE
SWITCH FOR THE LOW OIL QUANTITY SEEB
SEE A OIL TANK
CLAMP (2 LOCATIONS)  SLEEVE WIRE 
A
OIL TANK  BACKUP RING O-RING 
SWITCH FOR THE LOW OIL QUANTITY 

WASHER  FWD
SCREW  INBD 
LOW OIL QUANTITY SWITCH FOR THE 
B 
Figure 401 Low Oil Quantity Switch Installation 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TASK 49-94-11-404-007
 3. Low Oil Quantity Switch Installation (Fig. 401)
____________________________________
 A. References
 (1)  
AMM 49-11-00/201, APU Power Plant

 (2)  
AMM 49-91-31/301, Oil Tank

 B. Access
 (1)  
Location Zones
 101 Control Cabin, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 C. Procedure
 S 424-008
 (1)  
Install the switch for the low oil quantity.

 (a)  
Install a new O-ring and the backup ring on the switch.

 (b)  
Put the switch into the oil tank and attach with 4 screws and washers.

 (c)  
Attach the electrical receptacle to the bracket and install 4 screws, washers, and nuts.

 (d)  
Connect the electrical plug to the receptacle.

 (e)  
Install the clamp to the wire sleeve and electrical conduit.

 (2)  
Fill the oil tank (AMM 49-91-31/301).

 S 614-013
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OIL TEMPERATURE SWITCH - REMOVAL/INSTALLATION
_____________________________________________
 1.  General_______
 A.  This procedure contains the removal and installation tasks for the oil
 temperature switch.

 TASK 49-94-21-004-001
 2.  Oil Temperature Switch Removal (Fig. 401)______________________________
 A.  Access
 (1)  
Location Zones
 101 Control Cabin, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 B.  Procedure
 S 864-002
 (1)  Set the switch and the circuit breaker:
 (a)  
Set the APU master switch on the P5 forward overhead panel to the OFF position and attach a DO-NOT-OPERATE tag.

 (b)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit

 S 014-003
 (2)  Open the APU cowl door:
 (a)  
Open the latches for the APU cowl door.

 (b)  
Open the APU cowl door.

 (c)  
Connect the door support rods.

 S 014-004
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
　
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