TM 10-8145-222-23
0063
REPLACE CONTINUED
NOTE
Because of tight clearance, it may be necessary to cut half of pipe, then flip cutter
over to cut remaining half.
When cutting the main heat valve pipe to remove the heat valve, make the cut just
above the flared end of the pipe coming out of the main heat valve. The new main
heat valve will have copper piping extending out from the valve, and will need to be
trimmed to fit.
10. Pull slightly on 7/8-inch check valve (Figure 2, Item 23) for needed clearance to fit pipe cutter between
condenser (Figure 2, Item 4) and refrigerant pipe (Figure 2, Item 19) and cut pipe from bottom side of main heat
valve (Figure 2, Item 20) at cut location (Figure 2, Item 21).
WARNING
Many of the chemicals used while soldering are toxic. Avoid prolonged exposure to
fumes. Wear rubber gloves and eye protection. Failure to wear proper protective
clothing may result in skin irritation and/or serious eye injury. Wash hands with soap
and water after handling solder. If inhaled, move soldier to fresh air and seek medical
attention. If contact with skin or eyes is made, flush with clean water and seek
medical attention. Failure to observe this warning may result in serious injury to
personnel.
CAUTION
Use care when soldering and desoldering components into the system so as not to
overheat the component being soldered, or surrounding components. Wrapping the
component to be soldered in wet rags will act as a heat sink and minimize exposure
to heat.
NOTE
Make sure to note the position of the main heat valve before removing it so that
replacement valve can be installed in the same location.
11. Desolder refrigerant pipe (Figure 2, Item 22) from 7/8-inch check valve (Figure 2, Item 23) at desolder location
(Figure 2, Item 24). Ensure check valve is heat shrink/wrapped.
12. Remove main heat valve (Figure 2, Item 20) and 7/8-inch check valve (Figure 2, Item 23) assembly.
13. Desolder remaining portion of main heat valve (Figure 2, Item 20) pipe extrusion from pipe (Figure 2, Item 19).
14. Desolder tube (Figure 3, Item 9) from main heat valve (Figure 3, Item 20).
15. Remove one nut (Figure 2, Item 25) securing main heat valve (Figure 2, Item 20) to bracket (Figure 2, Item 3).
Retain bracket for reinstallation.
0063-6
