49-14-00
 ALL  ú ú 04 Page 431 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (n)  
Loosely attach the wire harness with the four clamps (23), the four bolts (22) and the four nuts (21) to the scavenge return tube.

 (o)  
Loosely attach the wire harness with the clamp (23), the bolt (50) and the nut (21) to the scavenge return tube bracket and to the scavenge return tube.

 CAUTION: DO NOT USE FORCE TO INSTALL THE P18 ELECTRICAL CONNECTOR.
_______ DAMAGE TO THE N1 SENSOR CAN OCCUR IF THE CONNECTOR IS INCORRECTLY ALIGNED.
 (p)  Connect the P18 connector (20) to the N1 speed sensor.
 NOTE: The connector is fully tightened when you cannot see
____
 the red color band.

 (q)  
Adjust the harness to ensure that it is not too loose or too strained at the P18 connector (20). 1) Tighten the five nuts (21).

 (r)  
Loosely attach the harness to the brackets on the fuel vent tube with the two clamps (40), the two bolts (39) and the two nuts (38).

 (s)  
Loosely attach the harness to the bracket on the bottom of the load compressor case with the clamp (40), the bolt (39) and the nut (38).

 (t)  
Loosely attach the P23 section of the harness with the grommet (18), the clamp (17), the bolt (16) and the nut (15) to the bracket on the load compressor case.

 (u)  
Connect the P19 connector (14) to the oil level sensor.

 NOTE: The connector is fully tightened when you cannot see
____
 the red color band.

 (v)  Connect the P23 connector (19) to the air temperature sensor (T12).
 NOTE: The connector is fully tightened when you cannot see
____
 the orange color band.

 (w)  Adjust the harness to ensure that it is not too loose or too strained at the P19 connector (14) and P23 connector (19). 1) Tighten the nut (15) and the three nuts (38).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 49-14-00
 ALL  ú ú 07 Page 432 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (x)  Loosely attach the bottom clamp (13) of the P20/P21 section of
 the wire harness to the retaining block bracket with the
 bolt (12) and nut (11).
 NOTE:____ The clamp loop must point in and point forward.
 (y)  Loosely attach the next second, third and forth clamps (13) to
 the brackets on the load compressor case with the three
 bolts (12) and three nuts (11).
 NOTE:____ The clamp loops must point in and point forward.
 (z)  Put the wire harness under the anti-surge pressure tube of the
 diverter control valve.

 (aa) Loosely attach the next fifth and sixth clamps (13) to the brackets on the load compressor case with the two bolts (12) and two nuts (11).
 NOTE: The clamp loops must be on the inner surface of the
____ brackets and point to the rear.
 (ab) Loosely attach the seventh clamp (13) of the wire harness to the bracket on the load compressor case with the bolt (12) and nut (11).
 NOTE: The clamp loop must point in and point forward.
____
 (ac) Connect the P21 connector (6) to the diverter valve control. NOTE: The connector is fully tightened when you cannot see
____ the red color band.
 (ad) Adjust the harness to ensure that it is not too loose or too strained at the P21 connector (6). 1) Tighten the seven nuts (11).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 49-14-00
 ALL  ú ú 02 Page 433 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (ae) Loosely attach the first grommet (10) and clamp (9) to the bracket on the load compressor case with the bolt (8) and nut (7).
 NOTE: The clamp loop must point in and point forward.
____
 (af) Loosely attach the second and third grommets (10) and clamps (9) to the brackets on the load compressor case with the two bolts (8) and two nuts (7).
　
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