(a)
Remove the protection caps from the EEC PT4.95 pressure tube.
(b)
Put the EEC PT4.95 pressure tube on the engine.
(c)
Attach the forward tube nut to the tube adapter to the rear of the flange N. 1) Tighten the tube nut with your hand.
(d)
Attach the aft tube nut to the tube adapter on the flange exhaust case. 1) Tighten the tube nut with your hand.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-24-07
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(e) Tighten the tube nuts to 200-225 pound-inches (22.5-25.4 newton-meters). 1) Safety the tube nuts with lockwire or safety cable and
safety cable ferrule.
S 414-075-N00
(23) For the lower forward and center forward cooling air tubes, install the forward oil vent tube of the No. 3 bearing between the diffuser case and HPT case with the steps that follow (views E and I):
(a)
Remove the protection caps from the openings of the oil vent tube.
(b)
Lubricate the tube nuts with the Fel-Pro C-200 antigalling compound.
(c)
Connect the tube nut to the tube adapter to the rear of the flange M.
(d)
Connect the tube nut to the adapter on the diffuser case. 1) Tighten the tube nut with your hand.
(e)
Attach the clamp on the oil vent tube to the adjacent tube clamp with the bolt and nut. 1) Tighten the bolt to 36-40 pound-inches (4.1-4.5
newton-meters).
(f)
Tighten the tube nut to the rear of the flange M to 200-225 pound-inches (22.5-25.4 newton-metrs).
S 414-142-N00
(24)
For the lower cooling air tubes (but not the aft cooling air tube), put the deoiler outlet tube on the engine.
S 414-078-N00
(25)
For the lower cooling air tubes (but not the aft cooling air tube), install the No. 3 TVC air duct (AMM 75-24-02/401).
S 414-079-N00
(26)
For the lower center aft and aft cooling air tubes, install the oil vent tube for the No. 3 bearing between the HPT case and exhaust case with the steps that follow (views A and E):
(a)
Remove the protection caps.
(b)
Lubricate the tube nuts with the Fel-Pro C-200 antigalling compound.
(c)
Put the oil vent tube for the No. 3 bearing 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 for the turbine exhaust case. 1) Tighten the tube nut with your hand.
(f)
Lubricate the threads of the bolt, which attach the tube clamp for the oil vent tube, with engine oil.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-24-07
ALL ú ú N01 Page 427 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(g)
Attach the tube clamp for the oil vent tube and the 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 bolts, which attach the tube clamps for the oil vent tube, with engine oil.
(i)
attach the tube clamp for the oil vent tube and the adjacent tube clamp to the flange P bracket with the bolt and nut. 1) Tighten the bolts with your hand.
(j)
Lubricate the threads of the bolts, which attach the tube clamps for the oil vent tube, with engine oil.
(k)
Attach the tube clamp for the oil vent tube and the adjacent tube clamp together to the rear of the flange P with the bolt and nut. 1) Tighten the bolt with your hand.
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