(b)
Install the gasket on the tube adapter.
(c)
Lubricate the threads of the tube adapter with engine oil.
(d)
Install the tube adapter in the port on the 2.9 bleed valve.
(e)
Tighten the tube adapter to 110-120 pound-inches (12.4-13.6 newton-meters).
S 424-059-N00
(2) If necessary, install the screen for the 2.9 bleed valve with the steps that follow:
(a)
Remove the protection caps.
(b)
Install the screen on the 2.9 bleed valve with the four screws.
1) Tighten the screws to 32-36 pound-inches (3.6-4.1 newton-meters).
(c)
Attach the screen to the housing of the 2.9 bleed valve through the center of the screen with a screw and washer. 1) Tighten the screw to 25-30 pound-inches (2.8-3.4
newton-meters).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
F. Procedure
S 424-060-N00
(1)
Install the 2.9 bleed valve:
(a)
Install the new gasket in the groove of the engine boss.
(b)
For the left 2.9 bleed valve, put the 2.9 bleed valve on the boss with the threaded adapter in the up and forward direction to align the adapter with the signal tube.
(c)
For the right 2.9 bleed valve, put the 2.9 bleed valve on the boss with the threaded adapter in the up and aft direction to align the adapter with the signal tube.
(d)
Lubricate the bolts, which attach the 2.9 bleed valve, with engine oil.
(e)
Attach the right 2.9 bleed valve and support brackets (support bracket for the wire bundle at approximately the 12 o'clock position and the tube support bracket at approximately the 5 o'clock position) on the lower flange of the 2.9 bleed valve with the bolts.
(f)
Attach the left 2.9 bleed valve with the bolts.
CAUTION: WHEN YOU USE THE TORQUE ADAPTER, MAKE SURE TO ADJUST THE
_______ TORQUE WRENCH INDICATION (AMM 70-23-00/201). IF YOU DO NOT ADJUST THE INDICATION, YOU CAN APPLY TOO MUCH TORQUE AND CAUSE DAMAGE TO THE THREADS OF THE BOLTS.
(g)
Tighten the bolts, from one side to the other side, to 85-95 pound-inches (9.6-10.7 newton-meters). 1) Without loosening, tighten the bolts again until the torque
is kept.
(h)
Lubricate the threads of the tube nut for the signal tube with the antigalling compound.
(i)
Connect the tube nut for the signal tube to the adapter on the
2.9 bleed valve.
1) Tighten the tube nut to 200-225 pound-inches (22.6-25.4 newton-meters).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
2) Safety the tube nut with lockwire or safety cable and safety cable ferrule.
(j) For the right 2.9 bleed valve, attach the clamps for the PS3 air tubes and the burner pressure tube with the steps that follow: 1) Lubricate the threads of the bolts, which attach the clamps, with engine oil. 2) Attach the clamps for the PS3 air tubes and burner pressure tube to the bracket on the lower flange of the 2.9 bleed valve with the bolts and nuts.
3) Tighten the bolt to 36-40 pound-inches (4.1-4.5
newton-meters).
(k) If necessary, install the cover to the boss on the 2.9 bleed valve with the steps that follow: 1) Lubricate the threads of the bolts, which attach the cover, with engine oil. 2) Install the cover to the boss on the side of the 2.9 bleed valve with the bolts. a) Tighten the bolts to 85-95 pound-inches (9.6-10.7
newton-meters).
(l) Remove the remaining sealant from the ground bracket and mating surfaces on the 2.9 bleed duct.
WARNING: DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH OR
_______ EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM MEK. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE MEK. KEEP MEK AWAY FROM SPARKS, FLAME, AND HEAT. MEK IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURY OR DAMAGE.
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