(Ref. Fig. 401/TASK 28-42-44-991-002) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499, Post SB 28-1087 For A/C 001-049,051-061,101-105,201-203, (Ref. Fig. 401A/TASK 28-42-44-991-002-A) **ON A/C ALL
 Subtask 28-42-44-420-052
 A. Preparation for Installation WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED
_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
 WARNING : DO NOT PUT COMPRESSED GAS IN CONTACT WITH YOUR SKIN. THE GAS
_______ CAN GO THROUGH THE SKIN AND MAKE BUBBLES IN THE BLOOD. THIS CONDITION CAN KILL YOU.
 (1) Use a plastic spatula to remove the sealant at the interface of the electrical backshell (21) and the tank wall.
 1EFF : ALL 1 28-42-44Page 419 1 1 Aug 01/05 1 1 1CES 1

 (2)
 Use a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026) to clean:

 -
the electrical backshell (21)

 -
the interface of the electrical backshell (21) and the tank wall.

 (3)
 Dry the cleaned areas with compressed air.

 (4)
 Make sure the parts retained from the removed component are clean and in the correct condition.

R **ON A/C 001-049, 051-061, 101-105, 201-203,
 Subtask 28-42-44-420-050
 B. Installation of the Harness
 (1) Use adhesive tape to secure the electrical connectors of the new harness (22) together. Attach the string to the end of the harness.
 NOTE : This will help you to move the center tank harness through its
____
 conduit.

 (2)
 Use the string to pull the center tank harness (22) through its conduit (16). When you install the center tank harness make sure it does not catch.

 (3)
 Remove and discard the adhesive tape and the string from the harness (22).

 (4)
 Put the harness (22) in position.

 (5)
 If necessary remove the items that follow:

 -
the screws (1), (2) and (10)

 -
the washers (3)

 -
the nuts (11)

 -
the loop-clamps (4), (5), (6), (7), (8), (9) and (14).

 (6)
 Put the loop-clamps (4), (5), (7), (8), (9) and (14) with the harness

 (22) in position.

 (7)
 If necessary put the loop-clamps (5), (6) and (9) with the harness

 (23) in position.

 (8)
 Install the screws (1), (2), and (10), the washers (3) and the nuts

 (11) and tighten.
 1EFF : ALL 1 28-42-44Page 420 1 1 May 01/05 1 1 1CES 1

 (9) Make sure that the electrical connectors are clean and in the correct condition.
 (10)
 Connect the center tank harness 17QT:

 (a)
 Identify the cable ends for the probes 36QT, 37QT and 38QT and connect them to the correct terminals (Ref. TASK 28-42-15-400-004).

 (b)
 Identify the cable ends for the sensors 20QJ and 21QJ and connect them to the correct terminals (Ref. TASK 28-46-15-400-012).

 (c)
 Identify the cable ends for the cadensicon 20QT and connect them to the correct terminals (Ref. TASK 28-42-16-400-002).

 (11)
 Install the O-ring (17) on the electrical backshell (21).

 (12)
 Install the electrical backshell (21) in the applicable position.

 (13)
 Install the washer (18) and the nut (19).

 (14)
 TORQUE the nut (19) to between 9.6 and 10.7 m.daN (70.79 and 78.90 lbf.ft).

 (15)
 Safety the nut (19) to the nut on the adjacent electrical backshell with MISCELLANEOUS (Material No. 19-010).

 (16)
 Apply SEALANTS (Material No. 09-001) around the electrical backshell

 (21) to seal it to the tank wall.

 (17)
 Connect the electrical connector (20) to the electrical backshell (21).

 **ON A/C 301-399,
 Subtask 28-42-44-420-050-B
 B. Installation of the Harness
 (1) Use adhesive tape to secure the electrical connectors of the new harness (22) together. Attach the string to the end of the harness.
 NOTE : This will help you to move the center tank harness through its
____
 conduit.

R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 28-42-44Page 421 1301-399, 1May 01/05 1 1 1CES 1

 (2)
 Use the string to pull the center tank harness (22) through its conduit (16). When you install the center tank harness make sure it does not catch.

 (3)
 Remove and discard the adhesive tape and the string from the harness (22).
　
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