(2)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (3)
 Apply lubricant:

 CAUTION : USE ONLY THE SPECIFIED LUBRICANT TO LUBRICATE THE O-RINGS
_______ AND THE PACKINGS. OTHER LUBRICANTS CAN CAUSE SMOKE OR A SMELL IN THE CABIN WHEN THEY BECOME HOT.
 (a) Apply a small quantity of:
 -COMMON GREASE (Material No. 04-007) or
 -LUBRICANTS (Material No. 06-007) to:
 -
the new O-ring (1) and,

 -
the new packing (8),

 NOTE : The material 04-007 is a molybdenum disulfide powder.
____ Before you can apply it you must first make it into a paste. To do this you must mix the powder with pure water or white spirit.
R 1EFF : ALL 1 21-52-23Page 450 1 1 Aug 01/05 1 1 1CES 1 NOTE : The material 06-007 is applied dry.

____
 (4)
 Remove the blanking plugs from the disconnected line ends.

 (5)
 Clean the component interface and/or the adjacent area.

 (6)
 Put the O-ring (1) in position on the pipe assembly (4), and the packing (8) in position on the anti-ice valve (9).

 (7)
 Put the pipe assembly (4) in position on the trim-air duct (2) and the anti-ice valve (9).

 (8)
 Install the clamps (3) and (7).
 NOTE : Do not fully tighten at this time.

____

 (9)
 Install the washers (5) and the screws (6).
 NOTE : Do not fully tighten at this time.

____
 (10)
 Make sure that the clamp (7) is in the correct position.

 (11)
 TORQUE the clamps (3) and (7) to between 0.51 and 0.56 m.daN (45.13 and 49.55 lbf.in).

 (12)
 TORQUE the screws (6) to between 0.4 and 0.5 m.daN (35.39 and 44.24 lbf.in).

 (13)
 Make sure that the work area is clean and clear of tool(s) and other items.

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 Subtask 21-52-23-865-062
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

R (1) FOR 10HM13
 -1HH, 2HH, 3HH, 4HH R (2) FOR 11HM13
 -21HH, 22HH, 23HH, 24HH

R  **ON A/C 401-499, 
R  Subtask 21-52-23-865-062-A 
R R  B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 
R R  (1) FOR 10HM11 - 49HH, 50HH, 51HH, 52HH, 
R R  (2) FOR 11HM11 - 53HH, 54HH, 55HH, 56HH. 
R  **ON A/C ALL
 Subtask 21-52-23-710-052
 C. Test
 (1) Do the pre-conditioning through the HP ground connector (Ref. TASK 12-33-21-618-001) or with the APU (Ref. TASK 12-33-21-618-001).
 (2) Do a leak check of the pipe assembly connections.
 NOTE : Leaks are not permitted.____
 (3) After approx. 15 minutes stop the pre-conditioning (Ref. TASK 12-33-21-618-001) or (Ref. TASK 12-33-21-618-001).
 5. Close-up________
 Subtask 21-52-23-410-058
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.
 (2) Install the access panel (Ref. TASK 53-35-13-400-002) FOR 10HM13 191KB, FOR 11HM13 192KB.

 Subtask 21-52-23-862-052
 B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).

 HEAT EXCHANGER UNIT (10HM4,11HM4) - REMOVAL/INSTALLATION
________________________________________________________ TASK 21-52-24-000-001 Removal of the Heat Exchanger Unit 10HM4 (11HM4) (From the Aircraft) WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
_______
 FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
 HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.

 NOTE : The procedure is the same for the heat exchanger unit 10HM4 and 11HM4.
____
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking plugs
 No specific circuit breaker(s) safety clip(s)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-52-23-000-001 Removal of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle Machine 21-52-24-200-001 Attachment Components (In-Service Wear Limits) - Heat
　
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