S 438-150-N00
(12) Prepare the harness for the backshell connection.
(a)
Make sure the braided shield in the harness is straight.
CAUTION:_______DO NOT PUT TAPE AROUND THE BRAIDED SHIELDS. THIS COULD
CAUSE AN INCORRECT GROUND AND CAUSE DAMAGE TO THE
EQUIPMENT.
(b)
Wind the red rubber tape (Moxness 620-3/4) around the area of the harness assembly where the two halves of the backshell strain-relief clamp are installed (Fig. 808 or 809). 1) Use a sufficient amount of tape around the harness to hold
the harness tight between the clamps. a) The two clamp bar surfaces must touch at the two screw hole locations.
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CONTACTS
STRESS RELIEF CLAMP
AND COUPLING NUT
CONNECTOR
GROMMET
EXPANDED COLLET
COLLET
INSTALLED
CONTACT
INSERTION
TOOL
DIRECTION CONTACT MOVES
CONTACTS INSTALLED FROM THE FRONT
GROMMET COLLET
EXPANDED COLLET
INSTALLED
CONTACT
DIRECTION CONTACT MOVES
INSERTION
TOOL
CONTACTS INSTALLED FROM THE REAR
Connector Contact Installation
Figure 812
C20092
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
b) No movement of the harness in the clamp is permitted.
(c) Fold the braided shield to the rear of the harness and over the top of the red rubber tape. 1) For the aluminum backshell, put the braided shield equally
around the harness.
2) For the stainless steel backshell, make the braided shields into two groups: a) Put one group of the braided shields on the top of the
harness to align with the backshell strain-relief clamp. b) Put the other group 180 degrees from the first group.
S 438-142-N00
(13) Connect the backshell to the connector (Fig. 807):
(a)
Hold the connector in your hand and move the backshell over the harness and the folded braided shield.
(b)
Connect the backshell coupling nut to the connector.
(c)
Tighten the coupling nut by hand to engage the anti-rotation
teeth.
(d)
Install the correct size of connector adapter on the connector assembly (Fig. 807).
NOTE: The connector adapter kit is used to hold the
____ connector assembly and prevent movement of the connector when you install the backshell. Use the CM-S-837 or CM-S-839T connector adapter kit, or equivalent.
(e) Tighten the backshell coupling nut to the connector until the metal surface of the coupling nut touches the metal surface of the connector. 1) For the aluminum backshell, use a TG-70 or BT-BS-611 strap
wrench, or equivalent. 2) For the stainless steel backshell, use a standard crowfoot, TG-70, or BT-BS-611 strap wrench, or equivalent.
NOTE: The rubber strap on the strap wrench will not
____ hold the backshell if you apply too much force.
S 438-151-N00
(14) Install the backshell strain-relief clamp (Fig. 808 or 809).
(a) For connectors with aluminum backshells do as follows: 1) Put the braided shields equally around the conical seat of
the backshell. 2) Move the conical ring over the harness. 3) Put the conical ring into the rear of the backshell with
the braided shields located between the backshell and the
ring. 4) Seat the conical ring into the backshell. 5) If necessary, cut the braided shields that are not
necessary on the rear side of the conical seat.
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本文链接地址：747-400 AMM 飞机维护手册 动力装置 POWER PLANT 2(114)
