-
the pipe assembly (91) and,

 -all other related seal contact areas.

 (b)
 Make sure that the seal location grooves in the sleeves (3), (15), (72), (77), (79) and (88) are not damaged or distorted.

 (4)
 Installation of the Seals (Ref. TASK 20-26-00-910-002)

 (a) Carefully put the new seals in the sleeves as follows:
 1_ the new seals (87) in the sleeve (88),
 2_ the new seals (71) in the sleeve (72),
 3_ the new seals (77) in the sleeves (78) and (79),
 4_ for the left main heat exchanger:
 - the new seal (84) in the sleeve (16) and,
 - the new seals (89) in the sleeve (3).
 5_ for the right main heat exchanger:
 - the new seal (184) in the sleeve (16) and,
 - the new seals (189) in the sleeve (3). 

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 (5) To Position Ducts, Pipe Assemblies and Sleeves
 NOTE : Turn the ducts, sleeves and pipe assemblies when you install
____ them. This will help to prevent damage to the seals in the sleeves.
 (6)
 Put the sleeve (3) in position on the heat exchanger (7) and move it on the heat exchanger as far as it will go.

 (7)
 Put the sleeve (88) in position on the flange (4) and move it on the flange as far as it will go.

 (a) Put the duct (14) in position in the sleeve (15).

 (8)
 Put the sleeve (15) in position on the heat exchanger (7) and move it as far on the heat exchanger as it will go.

 (a)
 Put the sleeve (72) in position on the flange (70) and move it as far on the flange as it will go.

 (b)
 Put the sleeve (78) in position on the flange (76).

 (c)
 Put the pipe assembly (91) in position in the sleeve (78).

 (d)
 Apply a small quantity of COMMON GREASE (Material No. 04-012) to the contact faces of the retaining cables (92).

 (e)
 Make sure that the retaining cables (92) are in line with the holes in the flange (76) and:

 -install the new washers (73) and the new nuts (74).
 NOTE : Hold the hexagon part of the retaining cables (92) to
____ prevent twisting of the cables when you install the nuts (74).
 (f) 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 (92) to
____ prevent twisting of the cables when you torque the nuts (74). Make sure that there is no tension in the cables (92) and that the cables (92) are not twisted. This will give a safe and flexible connection.
 (g) Put the sleeve (79) in position on the pipe assembly (91) and move it as far on the pipe assembly as possible.
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 Subtask 21-52-24-560-051-A
 B. Preparation of the Replacement Component
 (Ref. Fig. 401/TASK 21-52-24-991-001)

 WARNING : MAKE SURE THAT THERE IS A GOOD FLOW OF AIR THROUGH THE WORK
_______ AREA WHEN YOU USE SPECIAL MATERIALS. IF YOU GET ONE OF THESE MATERIALS ON YOUR SKIN, IN YOUR MOUTH OR IN YOUR EYES : -FLUSH IT AWAY WITH A FLOW OF CLEAN WATER FOR BETWEEN 10 AND 15 MINUTES. -GET IMMEDIATE MEDICAL AID IF IRRITATION OCCURS. DO NOT BREATHE THE FUMES FROM THE MATERIAL. DO NOT SMOKE WHEN YOU USE THE MATERIAL. DO NOT USE THE MATERIAL NEAR A FLAME, SPARKS OR SOURCES OF HEAT. THESE MATERIALS ARE DANGEROUS : THEY ARE POISONOUS, FLAMMABLE AND SKIN IRRITANTS.
 (1) Removal and Replacement of the Identification Plates
 (a)
 Remove the screws (52), the pack amendment plate (53) and the pack identification plate (51) from the removed heat exchanger unit (7).

 (b)
 Put the pack amendment plate (53) and the pack identification plate (51) in position on the replacement heat exchanger unit (7) and install the screws (52).

 NOTE : These steps are necessary as these plates carry the data
____
 for the air conditioning pack.

 (2) Cleaning of the Duct and the Sleeve Sealing Surfaces
 WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE
_______ THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES AND GOGGLES.
 (a)
 Remove the blanking caps from the applicable ducts and flanges.

 (b)
 Remove all deposits from the sealing surfaces with lint-free cotton cloth MISCELLANEOUS (Material No. 19-003) and CLEANING AGENTS (Material No. 11-001K).

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