(d)  
Remove the tee fitting from the inlet port to the low-pressure fuel filter.

 (e)  
Install the elbow with a new packing to the low-pressure fuel filter.

 (f)  
Install the inlet hose to the fuel control unit.

 S 915-084
 (15) Remove the external electrical power from the airplane (AMM 24-22-00/201).
 S 415-087
 CAUTION: KEEP A MINIMUM CLEARANCE OF 0.18 INCHES (5 MM) BETWEEN THE
_______ ENGINE, FIRE DETECTOR, CLAMPS, AND LOWER SHROUD.
 BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (16) Install the lower shroud:
 (a)  
Hold the lower shroud against the upper shroud.

 (b)  
Close the shroud latches.

 S 415-088
 (17) Close the APU cowl door:
 (a)  
Disconnect the door support rods.

 (b)  
Put the door support rods in the clips on the APU cowl door.

 (c)  
Close the APU cowl door.

 (d)  
Close the latches for the APU cowl door.

 S 865-089
 (18) Remove the DO-NOT-CLOSE tag and close this circuit breaker:
 (a)  E3-3 Electrical Shelf, APU Control Unit
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 49-31-00
 ALL  ú ú 02 Page 507 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FUEL CONTROL UNIT - REMOVAL/INSTALLATION
________________________________________
 1.  General
_______
 A.  This procedure gives the tasks to remove and to install the fuel control unit. The fuel control unit is on the forward left side of the APU.
 B.  You get access to the fuel control unit through the APU cowl door and the lower shroud.
 TASK 49-31-11-004-001-001
 2.  Fuel Control Unit Removal (Fig. 401)
_________________________
 A.  Standard Tools and Equipment
 (1)  Container - 1 U.S. Gallon (4 Liter) capacity, for fuel
 B.  References
 (1)  
AMM 49-31-21/401, Low Pressure Fuel Filter

 (2)  
AMM 49-31-31/401, Fuel Solenoid Valve

 (3)  
AMM 49-31-81/301, High Pressure Fuel Filter

 C.  Access
 (1)  
Location Zones
 101 Control Cabin (Left)
 205 Electronic Compartment
 703 APU Compartment

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

 D.  Procedure
 S 864-002-001
 (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 014-003-001
 (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.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT THE TAFCU ú

 49-31-11
 ú CONFIG 1 ú 01 Page 401 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE B
CONTROL AIR LINE SEE A (COMPRESSOR DISCHARGE AIR)
FUEL FUEL CONTROL UNIT
FWD
HOSE ELBOW
A
BRACKET
BOLT
LOCKNUT T-FITTING Y-FITTING FITTING
NUT
SEE  C 
1 
STUD 

DRIVE
SEAL
LOW PRESSURE  SHAFT
DRAIN
FUEL FILTER OUTLETHIGH PRESSURE PINFUEL FILTER
NUT MOUNTING
CONTROL AIR LINE
B  PAD
(THERMOSTAT)
CONTROL AIR LINE
　
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