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71-00-00
ALL ú ú N03 Page 580Y ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
TEST NO. 12 - ENGINE VACUUM TEST________________________________
(k) Install the spray shield to the inboard side of the Flange M
connection and attach the forward end with the hose clamp
(Fig. 510A).
1) Tighten the hose clamp to 15-18 pound-inches (1.7-2.0
newton-meters).
(l) Lubricate the threads of the bolt, which attaches the clamp at
the Flange M bracket, with engine oil.
(m) Install the clamp to the aft end of the spray shield on the oil
scavenge tube (LR06) and attach to the Flange M bracket with
the bolt and nut (Fig. 510A).
1) Tighten the bolt to 36-40 pound-inches (4.1-4.5
newton-meters).
S 425-251-N00
(25) ENGINES WITH PW SB 79-76; Install the oil scavenge tube assemblies (LR21) and (LR22) for the No. 4 bearing:
(a)
Attach the oil scavenge tube (LR21) to the oil scavenge tube (LR05) (Fig. 510B, View I). 1) Tighten the tube nut with your hand.
(b)
Install the clamps and attach with the bolts and nuts (Fig. 510B, Views H, J, K and L). 1) Tighten the bolts with your hand.
(c)
Lubricate the threads of the internal tube with engine oil.
(d)
Attach the oil scavenge tube (LR22) to the oil scavenge tube (LR21) tube and the port for the internal tube on the exhaust case (Fig. 510B, Views B and G). 1) Tighten the tube nut with your hand.
(e)
Install the clamps on the oil scavenge tube (LR22) and attach with the bolts (Fig. 510B, Views C, D, E and F). 1) Tighten the bolts with your hands.
(f)
Tighten the tube connection for the oil scavenge tubes (LR21) and (LR05) to 475-525 pound-inches (56.7-59.3 newton-meters). 1) Install the lockwire or safety cable and safety cable
ferrule to the tube nut.
(g)
Tighten the tube connection between the oil scavenge tubes (LR21) and (LR22) to 475-525 pound-inches (56.7-59.3 newton-meters). 1) Install the lockwire or safety cable and safety cable
ferrule to the tube nut.
(h)
Tighten the internal tube nut to the oil scavenge tube (LR22) to 270-300 pound-inches (30.5-33.9 newton-meters). 1) Install the lockwire or safety cable and safety cable
ferrule to the tube nut.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-00
ALL ú ú N03 Page 580Z ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
TEST NO. 12 - ENGINE VACUUM TEST
________________________________
S 425-252-N00
(26) ENGINES WITH PW SB 79-76; Install the spray shields for the oil scavenge lines for the No. 4 bearing:
(a)
Install the spray shield at the tube connection between the oil scavenge tubes (LR05) and (LR21) (Fig. 510B, View I).
(b)
Attach the spray shield with the clamp or bolt as applicable.
(c)
Install the spray shield at the tube connection between the oil scavenge tubes (LR21) and (LR22) (Fig. 510B, View B).
(d)
Attach the spray shield with the clamp or bolt as applicable.
(e)
Tighten the clamps to 15-18 pound-inches (1.7-2.0
newton-meters).
(f)
Tighten the nut and bolt to 36-40 pound-inches (4.1-4.5 newton-meters).
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本文链接地址：747-400 AMM 飞机维护手册 动力装置 POWER PLANT 1(89)
