SUBTASK 47-11-02-090-001
(2) Remove the protective covers from these ports:
(a) HFV muscle air duct [7]
(b) NEA duct [11]
(c) ASM [8]
(d) oxygen sensor tube [19]
SUBTASK 47-11-02-160-001
(3) Use the sealant removal tool, SPL-768, (sealant removal tool, COM-2481, or equivalent) to
remove sealant from the jumper tab [18].
SUBTASK 47-11-02-160-002
(4) Make sure that the high flow valve [1], ducts, ASM [8], coupling [5], sleeve [10], bolts [3],
washers [4], and jumper tab [18] are clean, free from grease and unwanted material.
SUBTASK 47-11-02-100-001
(5) To clean the components, do this task: General Cleaning of Metal (Series 80),
TASK 20-30-80-910-801.
SUBTASK 47-11-02-765-002
(6) Prepare these components for an electrical mating surface bond (SWPM 20-20-00):
(a) high flow valve [1]
(b) jumper tab [18]
SUBTASK 47-11-02-430-001
(7) Do these steps to install the two new o-rings [9]:
(a) Apply a thin layer of Krytox 240AC perfluoropolyether grease, D50063, to the two new
o-rings [9].
(b) Put the o-rings [9] in the cavities on the ASM [8] and the high flow valve [1].
H. Install the High Flow Valve
SUBTASK 47-11-02-430-002
(1) Do these steps to install the high flow valve [1] to the ASM [8]:
(a) Use the identification tags to correctly position the high flow valve [1].
(b) Hold the high flow valve [1] in its position.
(c) Attach the high flow valve [1] to the ASM mount [6] with the four bolts [3] and washers [4].
1) Do not fully tighten the bolts [3] until you align the high flow valve [1] with the
ASM [8], the NEA duct [11], the HFV muscle air duct [7], and the oxygen sensor
tube [19].
SUBTASK 47-11-02-430-003
(2) Do these steps to connect the high flow valve [1] to the Nitrogen Generation System (NGS):
(a) Install, but do not tighten, the nut on the HFV muscle air duct [7] to attach to the high flow
valve [1].
1) Make sure that the HFV muscle air duct [7] and the high flow valve [1] align.
(b) Install, but do not tighten, the nut on the NEA duct [11] to attach to the high flow valve [1].
1) Make sure that the NEA duct [11] and the high flow valve [1] align.
(c) Align the high flow valve [1] with the ASM [8].
1) Put the sleeve [10] in its position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-11-02
Page 408
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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