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 TM 5-4120-386-14
5-19. EXPANSION VALVES - Continued.
ACTION
REMARKS
LOCATION/ITEM
Removal-
Continued
2. Quench
Expansion
a.
Valve
Soften mastic bulb well
if necessary, by warming
with a cloth soaked in hot
water.
b.
Withdraw the bulb (10) from
the well. Take care to prevent
damage to the capillary tube.
c.
Remove two screws (5), two
spacers (7), two self locking
nuts (6) and two valve
mounting brackets (8).
d.
Debraze tubing from valve (9)
See Para. 5-12.
at debrazing points.
Remove quench valve (9).
e.
Installation
3. Primary
Expansion
With dry nitrogen flowing
a.
Valve
through refrigeration system,
braze valve (2) to tubing.
Take care to avoid kinking
capillary tube.
b. Coil excess tubing.
c . Insert approximately 1.0
ounce (28,349 gins) of
thermal mastic in bulb well.
d. Press sensing bulb (3) into
well (4) and work back and
forth to distribute mastic
thoroughly and until capillary
end is approximately 1.0 inch
(2.54 cm) beyond open end of
well.
See Para. 5-17
e. Replace dehydrator.
5-67
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