safety cable ferrule.
(k)
Tighten all the tube clamp bolts to 36-40 pound-inches (4.1-4.5 newton-meters).
S 414-029-N00
(4) ENGINES PRE-PW-SB 79-76; For the lower cooling air tubes, install the oil vent tube for the No. 3 bearing with the steps that follow:
(a) Remove the protection caps.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
(b)
Lubricate the tube nuts with the Fel-Pro C-200 antigalling compound.
(c)
Put the oil vent tube on the engine.
(d)
Attach the forward end of the oil vent tube to the adapter forward of the Flange M. 1) Tighten the tube nut with your hand.
(e)
Attach the aft end of the oil vent tube to the internal tube adapter of the turbine exhaust case. 1) Tighten the tube nut with your hand.
(f)
Lubricate the threads of the bolt, which attaches the tube clamp at the Flange N location, with engine oil.
(g)
Attach the tube clamp for the oil vent tube and adjacent tube clamp at the Flange N 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 at the Flange N location, with engine oil.
(i)
Attach the tube clamp for the oil vent tube and adjacent tube clamp to the Flange P bracket approximately at the 8 o'clock position 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 Flange P bracket, with engine oil.
(k)
Attach the tube clamp for the oil vent tube to the Flange P bracket at the approximately 7 o'clock position with the bolt and nut. 1) Tighten the bolt with your hand.
(l)
Lubricate the threads of the bolt, which attaches the tube clamp at the 7:30 o'clock position, with engine oil.
(m)
Attach the tube clamp for the oil vent tube to the adjacent tube clamp aft of the Flange P at the approximately 7:30 o'clock position with the bolt and nut. 1) Tighten the bolt with your hand.
(n)
Lubricate the threads of the bolt, which attaches the tube clamp between the Flange N and Flange P, with engine oil.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(o)
Attach the tube clamp for the oil vent tube to the adjacent tube clamp approximately in the middle of the Flange N and Flange P with the bolt and nut. 1) Tighten the bolt with your hand.
(p)
Tighten the tube nuts for the oil vent tube to 200-225 pound-inches (22.6-25.4 newton-meters). 1) Safety the tube nuts with lockwire or safety cable and
safety cable ferrule.
(q)
Tighten all bolts which attach the tube clamps to 36-40 pound-inches (4.1-4.5 newton-meters).
S 414-075-N00
CAUTION: DO NOT USE LUBRICANTS ON THE TUBE NUTS OF THE PT4.95 PRESSURE
_______ TUBE FOR THE EEC. THE USE OF LUBRICANTS CAN CAUSE CONTAMINATION OF THE EEC.
(5) ENGINES POST-PW-SB 79-76; For the lower cooling air tubes, install the vent tube for the No. 3 bearing and the PT4.95 pressure tube with the steps that follow:
(a)
Remove the protection caps from the open ends of the vent tube for the No. 3 bearing and the PT4.95 pressure tube.
(b)
Put the vent tube for the No. 3 bearing in position on the engine.
(c)
Connect the forward end of the vent tube for the No. 3 bearing to the adapter forward of the Flange M. 1) Tighten the tube nut with your hand.
(d)
Connect the aft end of the vent tube for the No. 3 bearing to the internal tube adapter on the turbine exhaust case. 1) Tighten the tube nut with your hand.
(e)
Put the PT4.95 pressure tube in position on the engine.
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