(13)
 Put the bellows (6) in position and install the clamp (5).

 (14)
 Move the sleeve (72) in position on the flange (17).

 (15)
 Make sure that the retaining cables (75) are in line with the holes in the flange (17).

 (16)
 Put the retaining cables (75) in position in the flange (17) and install the new washers (73) and the new nuts (74).

 NOTE : Hold the hexagon part of the retaining cables (75) to prevent
____ twisting of the cables when you install the nuts (74).
 (17)
 Make sure that the retaining cables (90) are in line with the holes in the flange (10).

 (18)
 Put the retaining cables (90) in position in the flange (10) and install the new washers (73) and the new nuts (74).

 NOTE : Hold the hexagon part of the retaining cables (90) to prevent
____ twisting of the cables when you install the nuts (74).
 (19) TORQUE the nuts (74) to between 0.85 and 1.0 m.daN (75.22 and 88.49 lbf.in).
 NOTE : Hold the hexagon part of the retaining cables (75) and (90) to
____ prevent twisting of the cables when you torque the nuts (74).
R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 21-52-24Page 437 1301-399, 1Aug 01/05 1 1 1CES 1 Make sure that there is no tension in the retaining cables

 (75) and (90).
 This will give a safe and flexible connection.

 (20)
 Wipe clean the excess COMMON GREASE (Material No. 04-012) from the retaining cables (75), (90) and (92).

 (21)
 Install the pipe assembly (Ref. TASK 21-52-23-400-001). NOTE : Do not install the access panel at this time.

____

 (22)
 Install the ram air outlet (Ref. TASK 21-61-52-400-003). NOTE : Do not install the access panel at this time.

____

 (23)
 Make sure that the work area is clean and clear of tool(s) and other items.

R **ON A/C 151-199, 401-499,
 Subtask 21-52-24-420-052-A
 C. Preparation for Installation
 (1) Prepare the attachment parts for installation,
 (a)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (b)
 Clean the component interface and/or the adjacent area.

 (c)
 Make sure that, 1 For the left heat exchanger unit (10HM4):

_
 -the seals (43) and (47) are in a good condition. 2 For the right heat exchanger unit (11HM4):
_ -the seals (143) and (147) are in a good condition.
 (d) If necessary replace the seals: 1 For the left heat exchanger unit (10HM4),
_ a The seals (43) and the seals (47).
_
R 1EFF : ALL 1 21-52-24Page 438 1 1 Aug 01/05 1 1 1CES 1 2 For the right heat exchanger unit (11HM4),

_ a The seals (143) and the seals (147).
_
 (e) Apply a small quantity of COMMON GREASE (Material No. 04-012) to the contact faces of the retaining cables (75) and (90).
 (2)
 Remove the protective cover from the cooling elements of the heat exchanger unit (7).

 (3)
 Install the inlet plenum (46):

 (a)
 For the left heat exchanger unit (10HM4), 1 Put the seals (43) and (47) and the inlet plenum (46) in

_ position on the heat exchanger unit (7).

 (b)
 For the right heat exchanger unit (11HM4), 1 Put the seals (143) and (147) and the inlet plenum (46) in

_ position on the heat exchanger unit (7).
 (4)
 Install the screws (48), the washers (49) and the nuts (50).

 (5)
 Put the bonding strap (41) in position and install the screw (42), the washer (44) and the nut (45) (Ref. TASK 20-28-00-912-004).

 (6)
 Put the clamp (9) and the sleeve (8) in position on the heat exchanger unit (7).

 (7) Tighten the clamp (9). Subtask 21-52-24-420-051-A
 D. Installation of the Heat Exchanger Unit NOTE : Turn the sleeves when you move them or when you install them. This
____ will help to prevent damage to the seals in the sleeves.
 NOTE : To make sure that the bolts (40) and (56) tighten correctly
____
 additional washers (39) and (57) may be fitted.

 NOTE : It is no longer required that the bonding strap (34) is fitted for
____
 the installation of the heat exchanger unit.

R 1EFF : 151-199, 401-499, 1 21-52-24Page 439 1 1 Aug 01/05 1 1 1CES 1

 (1) Install the heat exchanger unit WARNING : SUPPORT THE UNIT/ASSEMBLY OR IT WILL FALL AND BECOME
_______ DAMAGED OR INJURE PERSONNEL. THE UNIT/ASSEMBLY IS HEAVY.
 (a) Carefully put the heat exchanger unit (7) in position in the aircraft.
　
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