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 TM9 4120-423-14&P
CLEANING
All filler alloy must be cleaned from debrazed joints before reassembly. Heat each piece of the joint
until the filler alloy is melted and then wipe it away with a damp cloth. Be sure no filler alloy or other
debris are left inside any tubing, fitting, or component.
ASSEMBLY
1
If tubing sections or fittings were removed with a component, debraze them from the component,
clean the joints, and braze them to the new component before reinstallation.
2
Brazing. Braze joints within the air conditioner as follows:
3
Position the component to be installed.
4
To prepare a joint on a valve for brazing, disassemble the valve to the extent possible. Wrap all
but the joint with a wet rag to act as a heat sink.
5
Protect insulation, wiring harnesses, and surrounding components with appropriate shields.
6
Be sure the work area is well ventilated and that dry nitrogen is flowing through the refrigeration
system at a rate of less than 1 - 2 cfm (0.028 - 0.057 cubic meters/minute).
7
Apply sufficient heat uniformly around the joint to quickly raise it to a temperature that will melt
the filler alloy. Remove heat as soon as brazing is completed.
8
Go to WP0073.
END OF TASK
0072 00-3
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