(o)
Hold the strainer housing aligned with the pressure tube for the No. 4 bearing and tighten the internal tube-nut to 270-300 pound-inches (30.5-33.9 newton-meters). 1) Safety the internal tube-nut with lockwire or safety cable
and safety cable ferrule.
(p)
Tighten the three tube nuts of the pressure tubes for the No. 4 bearing to 340-375 pound-inches (38.4-32.4 newton-meters) (Views AA, AK and AL). 1) Safety the three tube nuts with lockwire or safety cable
and safety cable ferrule.
(q)
Tighten all clamp bolts 36-40 pound-inches (4.1-4.5 newton-meters).
(r)
Install the shields at the connections of the pressure tube for the No. 4 bearing with the steps that follow: 1) Put the shields in position at the connections of the
pressure tube for the No.4 bearing (Views AA, AK and AL). 2) Attach the shields with the hose clamps. 3) Tighten the three hose clamps to 15-18 pound-inches
(1.7-2.0 newton-meters).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 414-031-N00
(8)
For the lower cooling air tubes, connect the wire harness and support tube clamps on the LPT case with the steps that follow:
(a)
Lubricate the threads of the bolt, which attaches the tube clamp to the bracket on the Flange P, with engine oil.
(b)
Attach the support tube clamp to the bracket on the Flange P at the 5:30 o'clock position with the bolt and nut. 1) Tighten the bolt with your hand.
(c)
Lubricate the threads of the bolt, which attaches the tube clamp on the bridge bracket at the 5 o'clock position, with engine oil.
(d)
Attach the support tube clamp to the angle bracket on the bridge bracket at the 5 o'clock position with the bolt, and nut. 1) Tighten the bolt with your hand.
(e)
Lubricate the threads of the bolt, which attaches the tube clamp to the bracket on Flange N, with engine oil.
(f)
Attach the support tube clamp to the bracket on the Flange N at the 4 o'clock position with the bolt and nut. 1) Tighten the bolt with your hand.
(g)
Tighten all bolts to 36-40 pound-inches (4.1-4.5
newton-meters).
S 414-032-N00
(9)
ENGINES PRE-PW-SB 79-76; For the upper cooling air tubes, install the oil scavenge tube with the steps that follow:
(a)
Remove the protection caps.
(b)
Lubricate the threads of the tube nut with the Fel-Pro C-200 antigalling compound.
(c)
Connect the tube nut for the oil scavenge tube to the internal tube on the turbine exhaust case. 1) Tighten the tube nut with your hand.
(d)
Lubricate the threads of the tube nut at the other end of the oil scavenge tube with the Fel-Pro C-200 antigalling compound.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú N05 Page 434 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(e)
Connect the tube nut at the other end to the tube adapter on the forward end of the oil scavenge tube at the Flange M. 1) Tighten the tube nut with your hand.
(f)
Lubricate the threads of the bolt, which attaches the clamp to the bracket at the Flange P location, with engine oil.
(g)
Attach the 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 bolts, which attach the tube clamps to the Flange N brackets, with engine oil.
(i)
Attach the tube clamps at the three Flange N brackets to the brackets with bolts and nuts. 1) Tighten the bolts with your hand.
(j)
Tighten the clamp bolts to 36-40 pound-inches (4.1-4.5 newton-meters).
(k)
Tighten the tube nut at the turbine exhaust case to 200-225 pound-inches (22.6-25.4 newton-meters). 1) Safety the tube nuts with lockwire or safety cable and
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