TASK 28-22-15-404-009
 3. Fuel Line Installation
______________________
 A. Equipment
 (1) ST8709H - (optional) Gage tool, E. B. Wiggins Inc., 5000 Triggs St., Los Angeles, CA 90022
 B. Consumable Materials
 (1)  
D00250 - Petrolatum, VV-P-236

 (2)  
B00192 - Solvent, BMS 3-2, type I

 C. References
 (1)  
AMM 12-11-00/301, Fuel Servicing

 (2)  
SWPM 20-20-00, Standard Wiring Practices Manual

 (3)  
AMM 28-11-11/401, Wing Fuel Tank Access Panels

 (4)  
AMM 28-11-31/401, Center Tank Access Panel

 (5)  
AMM 28-22-00/201, Engine Fuel Feed System

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 ALL  ú ú 01 Page 402 ú Nov 15/98
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A
737-300/400/500MAINTENANCE MANUAL
 D. Access
 (1)  Location Zones
 221 Center Section Fuel Tank
 305 Left Fuel Tank
 405 Right Fuel Tank

 E. Procedure
 S 114-010
 (1)
Clean the mounting areas for the fuel line clamps with the solvent.

 S 434-011

 (2)  
Prepare to install the fuel line.

 (a)  Loosely attach the clamps to the support brackets.
 S 424-012
 (3)  Install the rigid coupling if the fuel line has a rigid coupling (Fig. 401).
 (a)  Put the coupling nut on the ferrule on line A.
 CAUTION: DO NOT PUT THE RETAINING RING OUT OF ITS CORRECT SHAPE.
_______ YOU CAN CAUSE PERMANENT DAMAGE TO THE RING AND LEAKAGE AT THE FITTING.
 (b)  
Put a new retaining ring on the ferrule to keep the nut on line

 A.

 (c)  
Lubricate a new O-ring with petrolatum.

 (d)  
Install the new O-ring on line B.

 CAUTION:_______DO NOT USE TOOLS TO TIGHTEN THE FUEL LINE FITTINGS. YOU CAN CAUSE DAMAGE DAMAGE TO THE FITTING OR LOOSEN THE ADJACENT FITTINGS.

 (e)  
Align the lines, A and B.

 (f)  
Tighten the coupling nut with your hand until it is tightly engaged.

 (g)  
Attach the nut to the ferrule with a lockwire.

 S 424-013
 (4)  Install the flexible half coupling if the fuel line has a flexible half coupling (Fig. 402).
 (a)  Put the coupling nut on the ferrule on the line.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 403 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
LOCKWIRE
COUPLING NUT
A
A
LINE B
BODY
FERRULERETAINING RING BODY LINE A
COUPLING NUT  ASSEMBLED VIEW
FERRULE
O-RING BODY
RETAINING RING
A-A
COUPLING NUT
LINE B
O-RING
FERRULE
LINE A

EXPLODED VIEW
Rigid Coupling Installation
Figure 401

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-15
 ALL  ú ú 01 Page 404 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 CAUTION: DO NOT PUT THE RETAINING RING OUT OF ITS CORRECT SHAPE.
_______ YOU CAN CAUSE PERMANENT DAMAGE TO THE RING AND LEAKAGE AT THE FITTING.
 (b)  
Put one new retaining ring on the ferrule to keep the nut on the line.

 (c)  
Lubricate the new O-ring with petrolatum.

 (d)  
Put the new O-ring on the ferrule.

 CAUTION: DO NOT PUT THE RETAINING RING OUT OF ITS CORRECT SHAPE.
_______ YOU CAN CAUSE PERMANENT DAMAGE TO THE RING AND LEAKAGE AT THE FITTING.
 (e)  
　
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