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75-24-09 ALL ú ú N02 Page 436 ú Jun 18/99 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. (l) Install the six bolts that attach the clamps for the aft scavenge tube for the No. 4 bearing (Views AO, AP, AQ and AR). 1) Tighten the bolts with your hand.
(m) Hold the elbow of the aft scavenge tube for the No. 4 bearing and tighten the internal tube-nut to 270-300 pound-inches (30.5-33.9 newton-meters) (View AN). 1) Safety the internal tube-nut with lockwire or safety cable
and safety cable ferrule.
(n) Tighten the two tube nuts of the scavenge tubes for the No. 4 bearing to 475-525 pound-inches (56.7-59.3 newton-meters) (Views AM and AU). 1) Safety the two tube nuts with lockwire or safety cable and
safety cable ferrule.
(o) Tighten all tube clamp bolts 36-40 pound-inches (4.1-4.5 newton-meters).
(p) Install the shields at the connections of the scavenge tube for the No. 4 bearing with the steps that follow: 1) Put the shields in position at the connections of the
scavenge tube for the No. 4 bearing (Views AM and AU). 2) Attach the shields with the hose clamps. 3) ENGINES PRE-PW-SB 79-75; Install the clamp on the forward tube shield and attach the clamp with the bolt and the nut (View AU). a) Tighten the bolt with your hand.
4) Tighten the hose clamps to 15-18 pound-inches (1.7-2.0 newton-meters). 5) ENGINES PRE-PW-SB 79-75; Tighten the bolt that attaches the clamp of the forward shield to 36-40 pound-inches (4.1-4.5 newton-meters). S 414-033-N00 (11) ENGINES PRE-PW-SB 79-76; For the upper cooling air tubes, install the oil pressure tube for the No. 4 bearing with the steps that follow: (a) Remove the protection caps from the oil pressure tube.
(b) Lubricate the threads of the tube nuts with the Hi-T 650 antigalling compound.
(c) Put the oil pressure tube on the engine.
(d) Connect the aft tube nut to the tube coupling to the rear of the Flange P. 1) Tighten the tube nut with your hand.
(e) Connect the forward tube coupling to the tube nut forward of the Flange M. 1) Tighten the tube nut with your hand.
(f) Lubricate the threads of the bolt, which attaches the tube clamp to the bracket at the Flange P location, with engine oil.
(g) Attach the tube clamp at the Flange P location to the bracket with the bolt and nut. 1) Tighten the bolt with your hand.
(h) Lubricate the threads of the bolt, which attaches the tube clamp to the bracket at the Flange N, with engine oil.
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75-24-09 ALL ú ú N02 Page 437 ú Jun 18/99 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. ////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL //////////////////////// (i) Attach the tube clamp at the Flange N location to the bracket with the bolt and nut. 1) Tighten the bolt with your hand.
(j) Lubricate the threads of the bolt, which attaches the tube clamp to the bracket at the Flange M, with engine oil.
(k) Attach the tube clamp at the Flange M location to the bracket with the bolt and nut. 1) Tighten the bolt with your hand.
(l) Tighten all tube clamp bolts at the Flanges M, N and P to 36-40 pound-inches (4.1-4.5 newton-meters).
(m) Attach the tube clamp to the rear of the Flange N to the adjacent tube clamp with the bolt, spacer and nut. 1) Tighten the bolt to 36-40 pound-inches (4.1-4.5
(n) Tighten the tube nuts to 450-500 pound-inches (50.8-56.5 newton-meters). 1) Safety the tube nuts with lockwire or safety cable and
safety cable ferrule.
(o) Attach the spray shield to the inboard side of the aft tube connection with the clamps. 1) Tighten the clamps to 15-18 pound-inches (1.7-2.0
(p) Attach the spray shield to the inboard side of the forward tube connection with the steps that follow: 1) Install the spray shield to the inboard side of the forward www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 大气 AIR 2
