HIGH PRESSURE
(PRE-HONEYWELL-SB GTCP85-49-7484)
FUEL LINE
2 FUEL CONTROL UNIT WITH SPIDER COUPLING ASSEMBLY
(POST-HONEYWELL-SB GTCP85-49-7484)

Fuel Control Unit Installation
Figure 401

A39531
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 49-31-11
 ú CONFIG 2 ú 01 Page 402 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 014-004-002
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (3)  Remove the lower shroud:
 (a)  
Hold the lower shroud and open the shroud latches.

 (b)  
Remove the lower shroud.

 S 024-005-002
 (4)  Remove the fuel control unit from the APU:
 (a)  
Put the container below the elbow on the low pressure fuel filter.

 (b)  
Disconnect the fuel hose from the elbow on the low pressure fuel filter. 1) Let the fuel drain into the container.

 (c)  
Put the container below the elbow on the fuel solenoid valve.

 (d)  
Disconnect the high pressure fuel line from the elbow on the fuel solenoid valve. 1) Let the fuel drain into the container.

 (e)  
Disconnect the electrical plug from the fuel solenoid valve.

 1)  Install caps on the plug and the fuel solenoid valve to prevent damage and contamination.

 (f)  
Disconnect the control air line (compressor discharge air) from the fitting on the fuel control unit.

 (g)  
Remove the nuts and washers that attach the fuel control unit to the APU engine.

 (h)  
Carefully remove the fuel control unit in a straight line to prevent damage to the drive shaft splines and the mounting studs.

 (i)  
Install caps and plugs on all the disconnected lines and the ports to prevent contamination.

 S 034-006-002
 (5)  
If it is necessary, remove the fuel solenoid valve from the fuel control unit (AMM 49-31-31/401).

 S 034-007-002

 (6)  
If it is necessary, remove the low pressure fuel filter from the fuel control unit (AMM 49-31-21/401).

 S 034-008-002

 (7)  
If it is necessary, do the servicing for the high pressure fuel filter on the fuel control unit (AMM 49-31-81/301).

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 49-31-11
 ú CONFIG 2 ú 01 Page 403 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
TASK 49-31-11-404-009-002
 3.  Fuel Control Unit Installation (Fig. 401)______________________________
 A. Consumable Materials
 (1)  D00569 Grease - MIL-G-21164
 B. References
 (1)  
AMM 49-11-00/201, APU Power Plant

 (2)  
AMM 49-11-00/501, APU Power Plant

 (3)  
AMM 49-31-00/201, APU Fuel System

 (4)  
AMM 49-31-21/401, Low Pressure Fuel Filter

 (5)  
AMM 49-31-31/401, Fuel Solenoid Valve

 (6)  
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 434-010-002
 (1)  
If the high pressure fuel filter was removed from the fuel control unit, install the high pressure fuel filter (AMM 49-31-81/301).

 S 434-011-002

 (2)  
If the fuel solenoid valve was removed from the fuel control unit, install the fuel solenoid valve (AMM 49-31-31/401).
　
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