S 434-025
 (2)  
Connect the coupling nut on the APU fuel line to the APU fuel valve and the APU fuel fitting at the 70.85 rib web.

 S 434-026

 (3)  
Connect the coupling nut that attaches the APU fuel valve, to these assemblies:

 (a)  
The APU fuel line

 (b)  
The T-fitting

 (c)  
The bypass fitting

 S 434-027
 (4)  
Connect the coupling nuts that attach to the engine fuel line and the T-fitting to the APU fuel line.

 S 434-028

 (5)  
Put the bypass on the bracket in its correct position.

 (a)  Install the mounting bolts.

 (6)  
Put the support clamps in the correct position.

 S 434-030

 (7)  
Connect bonding jumpers for the APU fuel line.

 S 434-029
 (a)  Install the bolts that attach the support clamps.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
SEE G
SEE F
SEE C
SEE E
SEEA B
SEE D WASHER
SEAL WASHER (BELOW THE
(BELOW THE RETAINER)
BOLT HEAD)
70.85 RIB WEB
RETAINER NUT
BOLT
(2 LOCATIONS) FITTING RETAINER
APU FUEL LINE
BULKHEAD
SUPPORT CLAMP (THE PART IN THE
UNION
(4 LOCATIONS)
WING CENTER SECTION) APU FUEL
COUPLING
FEED LINE
NUT
APU FUEL LINE (THE PART IN THE NO. 1 TANK)
70.85
APU FUEL
RIB WEB

VALVE
COUPLING O-RING SEAL NUT
BULKHEAD
BONDING APU FUEL LINE
UNION  BULKHEAD
JUMPER (THE PART IN THE
NUT
SEE B WING CENTER SECTION)
RELIEF
VALVE

COUPLING INBD
NUT  B
CHECK
VALVE
TEE BONDING JUMPERCHECK
VALVE
FOR THE BYPASS
APU FUEL LINE

SUCTION
PORT

FWD
A
APU Fuel Feed Line Installation Figure 401 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 406 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL 
FLEXIBLE SHROUD FLANGE  MAIN SHROUD FLANGE SEAL GASKET  TUBE MAIN SHROUD 
FLEXIBLE SHROUD 
FUEL LINE FLEXIBLE 
FLEXIBLE SHROUD FLANGE  COUPLING NUT DRAIN LINE  PRESSURE BULKHEAD  FUEL LINE FLEXIBLE 
GASKET SEAL 
BOLT, WASHER AND NUT (4 LOCATIONS)  COUPLING NUT INTERCONNECT FITTING TOP SKIN OF THE WING CENTER SECTION  O-RING MAIN SHROUD  APU SHROUD (SECTION 1) MOUNTING BOLTS AND WASHERS 
C  APU FUEL LINE (THE CENTER SECTION) PART IN THE WING  FWD  SEALING GASKET SLIP JOINT SEALING GASKET 
D 

FLEXIBLE SHROUD
AFT SHROUD (SECTION 2)
HOSE CLAMP
AFT SHROUD (SECTION 1)
ACCESS DOOR,
3701, FOR THE

APU FLEXIBLESTABILIZER TRIM FUEL LINE
E
FWD
APU Fuel Feed Line Installation
Figure 401 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-81
 ALL  ú ú 03 Page 407 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
BONDING JUMPER
BOLT, WASHER
AND NUT
BOLT
SHROUD CLAMP
HOSE
CLAMP
WASHER
NUT
APU FUEL LINE
(IN PART IN THE
APU COMPARTMENT)

COUPLING
FUEL FLEXIBLE SHROUD
LINE SHROUD SPACER HOSE CLAMP
FLEXIBLE FUEL LINE
FWD
AFT SHROUD (SECTION 2) SHROUD CLAMP
F
CHECK VALVE FOR
　
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