CAUTION:_______DO NOT USE TOOLS TO TIGHTEN THE FUEL LINE FITTINGS. YOU CAN CAUSE DAMAGE DAMAGE TO THE FITTING OR LOOSEN THE ADJACENT FITTINGS.
(f)
Put the line into the fitting.
(g)
Tighten the coupling nut with your hand.
S 424-014
(5) Install the flexible full coupling if the fuel line has a flexible full coupling (Fig. 403).
(a)
Put the coupling nut on the ferrule on line A.
(b)
Put the coupling on the ferrule on line B.
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.
(c)
Put one new retaining ring on each ferrule to keep the nut and the coupling on the ends of the fuel line.
(d)
Lubricate new O-rings with petrolatum.
(e)
Put one O-ring on each ferrule.
(f)
Attach the two halves of the retainer.
(g)
Put the two tube ends together with a space of 0.15 (|0.05) inch between the ferrules.
(h)
Make sure the retainer rings and the retainer halves hold the O-rings tightly between them.
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28-22-15
ALL ú ú 01 Page 405 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
COUPLING NUT
Flexible Half Coupling Installation Figure 402
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28-22-15
ALL ú ú 01 Page 406 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(i) Put the two halves of the retainer together.
NOTE: There is a click when you engage the two halves of
____
the retainer correctly.
CAUTION:_______DO NOT USE TOOLS TO TIGHTEN THE FUEL LINE FITTINGS. YOU CAN CAUSE DAMAGE DAMAGE TO THE FITTING OR LOOSEN THE ADJACENT FITTINGS.
(j)
Tighten the coupling nut with your hand (Fig. 403).
(k)
Attach the coupling nut to the coupling with a lockwire.
S 434-015
(6)
Tighten the bolts, the washers, and the nuts that attach the fuel line clamps to the support bracket.
S 434-016
(7)
If the brackets are not attached with rivets, tighten the bolts, the washers, and the nuts that attach the brackets to the structure.
S 114-017
(8)
Clean the mounting surfaces for the bonding jumpers with the solvent.
S 434-018
(9)
Install the bolt, the washer, and the nut that connect the bonding jumpers.
S 764-019
(10)
Do a check of the bonding resistance between the fuel line and the airplane structure (SWPM 20-20-00).
(a) The bonding resistance must not be more than 0.01 ohm.
S 794-022
(11)
Examine the equipment that you installed (the fuel line or the couplings) for leakage (AMM 28-22-00/201).
S 414-020
(12)
If you went into a fuel tank, close the fuel tank.
(a)
Remove all tools, all equipment, and all unwanted material from the fuel tank.
(b)
Install the applicable access panel for the fuel tank
(AMM 28-11-11/401, AMM 28-11-31/401).
(13)
Fill the fuel tanks with fuel (AMM 12-11-00/301).
S 654-021
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-15
ALL ú ú 02 Page 407 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
COUPLING NUT
A
COUPLING
A
O-RINGS COUPLING NUTLINE B COUPLING
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