(2)
Make sure that the parts retained from the removed component are clean and in the correct condition.
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(3) Do a visual inspection of the trim-air check valve flappers to make sure that they are in a good condition and that they move easily.
(a) FOR 18HM
1 Remove the protective covers from the open ends of the ducts
_ (1) and (14), the duct spigot (26) and the sleeve (25).
2 Make sure that the seals (27) are in a good condition. If
_ necessary replace the seals (27).
3 Apply a small amount of:
_
-COMMON GREASE (Material No. 04-007)
or
-LUBRICANTS (Material No. 06-007)
to the seals (27) before you install them.
4 Make sure that the packings (4) and (12) are in a good
_ condition. If necessary replace the packing (4) and/or the packing (12).
5 Loosen the bolts (15).
_
6 Put the packing (4) and the trim-air check valve (9) in
_ position on the duct (14).
NOTE : Make sure that the flaps open in the direction of the
____ airflow, and that the pin (11) is in the location hole in the duct flange.
7 Put the packing (12) in position on the flange of the duct
_ (1).
8 Apply a small quantity of:
_
-COMMON GREASE (Material No. 04-007)
or
-LUBRICANTS (Material No. 06-007) to the seal (27) in the sleeve (25) before you install the duct spigot (26).
9 Carefully put the duct spigot (26) in position in the sleeve
_ (25).
NOTE : Turn the sleeve (25) when you put the duct spigot (26)
____ in position. This will help to prevent damage to the seals in the sleeve.
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10 Carefully put the duct (1) in position on the duct (14).
__ NOTE : Make sure that you do not move the packings (4) and
____ (12) and the trim-air check valve (9) when you position the duct (1).
11 Install the bolts (10), the washers (8) and the nuts (7).
__
12 Put the support rods (28) and (30) in position in the clevis
__
(33) and install the bolts (29), the washers (31) and the nuts (32).
13 Put the bonding strap (3), in position and install the bolt
__ (13), the washer (5) and the nut (6) (Ref. TASK 20-28-00-912-004).
14 Put the bonding strap (22), in position and install the bolt
__ (23), the washer (21) and the nut (20) (Ref. TASK 20-28-00-912-004).
(b) FOR 19HM 1 Remove the protective covers from the open ends of the ducts
_
(2) and (14), the duct spigot (26) and the sleeve (25). 2 Make sure that the seals (27) are in a good condition. If
_
necessary replace the seals (27).
3 Apply a small amount of:
_
-COMMON GREASE (Material No. 04-007)
or
-LUBRICANTS (Material No. 06-007)
to the seals (27) before you install them.
4 Make sure that the packings (4) and (12) are in a good
_ condition. If necessary replace the packing (4) and/or the packing (12).
5 Loosen the bolts (15).
_ 6 Put the packing (4) and the trim-air check valve (9) in
_
position on the duct (14).
NOTE : Make sure that the flaps open in the direction of the
____ airflow, and that the pin (11) is in the location hole in the duct flange.
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7 Put the packing (12) in position on the flange of the duct
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