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79-21-17
ALL ú ú N03 Page 411 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(k) ENGINES WITH PW SB 72-211; Make sure the center of the forward clamp on the oil trim pressure tube is 2.500 - 3.000 inch (63.500 - 76.200 mm) from the center of the rear clamp.
(l) Tighten the clamp bolts and tubes exactly as follows: 1) Tighten the clamp bolt that attaches the No. 3 bearing oil pressure manifold clamp back to back with the oil trim pressure tube clamp to 36-40 pound-inches (4.1-4.5 newton-meters). 2) Tighten the clamp bolts that attach the tubes to the oil cooler rear bracket to 36-40 pound-inches (4.1-4.5 newton-meters). 3) ENGINES WITHOUT PW SB 79-52; Tighten the clamp bolt (20) that attaches the No. 3 bearing oil strainer (19) to the Flange K bracket (16) to 36-40 pound-inches (4.1-4.5 newton-meters). 4) ENGINES WITH PW SB 79-52; Tighten the bolts that attach the ferrule end of the No. 3 bearing pressure tube to the bracket on Flange K to 36-40 pound-inches (4.1-4.5 newton-meters). 5) Tighten the three bolts that attach the oil trim pressure tube (3) to the main oil filter housing to 85-95 pound-inches (9.6-10.7 newton-meters). 6) Tighten the front tube nut of the No. 3 bearing oil pressure manifold (1) to the strainer housing to 140-160 pound-inches (15.8-18.1 newton-meters), then loosen and tighten again to the same value. 7) Tighten the tube nuts that attach the oil tube metering nipple (2) to 675-750 pound-inches (76.3-84.7 newton-meters). 8) ENGINES WITH PW SB 79-52; Do the steps that follow: a) Install a clamp to the tube nut end of the oil trim pressure tube (3). b) Attach the clamp to a bracket on the secondary flow control valve flange with a bolt, lubricated with Engine Oil, and a nut. c) Tighten the nut to 36-40 pound-inches (4.1-4.5 newton-meters).
9) ENGINES WITHOUT PW SB 79-52; Tighten the No. 3 bearing oil pressure manifold nut to the No. 3 bearing oil strainer (19) at Flange K (16) to 675-750 pound-inches (76.3-84.7 newton-meters).
(m) Attach the lockwire or safety cable and safety cable ferrule at all necessary locations.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
79-21-17
ALL ú ú N03 Page 412 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(n) ENGINES WITHOUT PW SB 79-52; Do the steps that follow: 1) Install the spray shield (14) to the inboard side of the
rear No. 3 bearing oil pressure manifold connection. 2) Attach the spray shield (14) with the hose clamp (13). 3) Tighten the hose clamp (14) to 15-18 pound-inches (1.7-2.0
newton-meters).
(o) ENGINES WITH PW SB 79-52; Do the steps that follow: 1) Install the spray shield (21) to the inboard side of the
rear No. 3 bearing oil pressure manifold (1) that is
attached to the No. 3 bearing pressure tube (15).
2) Attach the spray shield (21) with a clamp and a bolt (28), threads lubricated with Engine Oil, to a bracket attached to the flange of the cooling air tube on the high compressor.
3) Tighten the bolt (28) to 36-40 pound-inches (4.1-4.5 newton-meters).
E. Put airplane back to its initial condition.
S 614-020-N00
(1) Fill the engine oil system (AMM 12-13-01/301).
S 414-021-N00
WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT COULD OCCUR.
(2)
Close the left thrust reverser (AMM 78-31-00/201).
S 414-022-N00
(3)
Close the left core cowl panel (AMM 71-11-06/201).
S 444-023-N00
(4)
Do the activation procedure for the thrust reverser
(AMM 78-31-00/201).
(5)
Close the left fan cowl panel (AMM 71-11-04/201).
S 714-025-N00
(6)
Do the test of the main bearing strainer housing assembly that is shown in the Power Plant Test Reference Table (AMM 71-00-00/501).
S 414-024-N00
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