TM 9-4110-255-14
5-11. PURGING THE REFRIGERANT SYSTEM . - Continued
(8)
Check to be sure that no oil is being discharged during purge.
(9)
Perform any brazing/debrazing operations necessary (para 5-12).
(11) Disconnect the charge hose from nitrogen regulator.
5-12. BRAZING/DEBRAZING PROCEDURE .
This task covers:
a. Debrazing
b. Cleaning
c. Brazing
INITIAL SETUP
Materials/Parts:
General Safety Instructions:
Brazing Alloy
WARNING
23 or 24, Appendix E
Brazing Flux
3, Appendix E
Brazing alloys and flux contain materials
Rags
which are hazardous to health. Avoid
9, Appendix E
breathing vapors or fumes from brazing
Abrasive Cloth
operations. Perform operations only in well
ventilated areas. Wash hands with soap and
Equipment Conditions:
Wear gloves and protective goggles or face
Refrigerant system discharged (para 5-10) and purged
shield to protect against burs.
a.
Debraze.
(1)
Protect wiring harnesses and other components with appropriate heat shields.
NOTE
It may be easier to access a component by cutting or debrazing the copper lines in accessible
areas and removing part of the interconnecting tubing with the component.
(2)
If debrazing a joint on a valve, disassemble the valve to the extent possible and wrap all but the joint
with wet rag to act as a heat sink.
5-18
