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

 C. Procedure
 S 424-007
 (1)  Install the fuel solenoid valve on the APU:
 (a)  
Remove the caps, covers and plugs from all the disconnected lines, electrical connector and ports.

 (b)  
Install the fuel solenoid valve on the APU with the screws and washers.

 (c)  
Install a lockwire to the screws.

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 49-31-31
 ALL  ú ú 01 Page 403 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
(d)  
Connect the high pressure fuel line to the fitting on the fuel solenoid valve.

 (e)  
Connect the high pressure fuel line to the fitting on the fuel control unit.

 (f)  
Connect the electrical connector to the fuel solenoid valve.

 (g)  
Install a lockwire to the electrical connector.

 S 874-008
 (2)  Do the high pressure bleed (AMM 49-31-00/201).
 S 414-009
 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.
 (3)  Install the lower shroud: (a) Hold the lower shroud against the upper shroud. (b) Close the shroud latches.
 S 414-010
 (4)  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 864-011
 (5)  Set the circuit breaker and the switch: (a) Remove the DO-NOT-CLOSE tag and close this circuit breaker: 1) E3-3 Electrical Shelf, APU Control Unit (b) Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.

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 ALL  ú ú 01 Page 404 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FUEL SOLENOID VALVE - ADJUSTMENT/TEST
_____________________________________
 1.  General
_______
 A.  This procedure gives a task to do an operational test of the fuel solenoid valve. The test gives a fast indication that there is a problem with the fuel solenoid valve.
 B.  The fuel solenoid valve is attached to the housing of the fuel control unit.
 TASK 49-31-31-705-001
 2.  Operational Test - Fuel Solenoid Valve
______________________________________
 A.  References
 (1)  AMM 49-11-00/201, APU Power Plant
 B.  Access
 (1)  
Location Zones
 101 Control Cabin (Left)
 205 Electronic Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door

 C.  Procedure
 S 865-002
 (1)  Start and operate the APU (AMM 49-11-00/201).
 (a)  Let the APU operation become stable with no load applied.
 S 715-003
 (2)  Do the operational test of the fuel solenoid valve:
 (a)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit

 (b)  
If the APU will not shut down with the circuit breaker open, do the following: 1) Shut down the APU (AMM 49-11-00/201) and tag the APU master

 switch DO-NOT-OPERATE.
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