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TM 5-4120-361-14
b.
Removal.
1.
Caution should be exer-
cised with fluorocarbon re-
frigerant gas (freons) as they
can displace oxygen and there-
by cause suffocation.
2.
Personnel with a history
or other evidence of cardiac
rhythm abnormalities should be
made aware of the potential
for aggravation of existing
cardiac rhythm abnormalities
or the induction of arryth-
mias, as a result of exposure
to fluorocarbon refrigerant
gases (freons).
Such indivi-
duals should be evaluated by
local medical authorities be-
fore working in environments
where potential freon exposure
may occur.
(1) Refer to figure 6-1 and dis-
charge the refrigerant system.
(2) Refer to figure 4-4 and remove
the top front cover.
(3) Refer to figure 5-10.
Soften
the mastic in the bulb well and remove
the expansion valve bulb.
Take care to
avoid damaging the capillary tube.
(4) Remove the expansion valve
clamp.
(5) Unsolder the expansion valve
from the refrigerant system tubing.
c.
Installation.
(1) Refer to figure 5-10 and mount
the expansion valve against the compart-
ment wall using the mounting clamp.
1.
Brazing operations should
be carried out using approved
eye protection equipment and
rods not containing cadmium.
2.
Certain brazing operations
may require mechanical venti-
lation.
3.
Local preventive medicine
personnel should be queried if
doubt exists as to rod compo-
sition or ventilation require-
ments.
(2) Solder the expansion valve to
the refrigerant system tubing.
(3) Refer to para 5-6 and leak test
the refrigeration system.
(4) Insert approximately one ounce
of thermal mastic in bulb well.
Insert
sensing bulb of expansion valve and move
bulb back and forth to distribute
mastic.
Position bulb approximately one
inch beyond open end of bulb well. -
(5) Refer to figure 6-1
the refrigerant system.
(6) Refer to figure 4-4
stall top front cover.
and purge
and in-
1.
Caution should be exer-
cised with fluorocarbon
refrigerant gas (freons) as
they can displace oxygen and
thereby cause suffocation.
2.
Personnel with a history
or other evidence of cardiac
rhythm abnormalities should be
made aware of the potential
for aggravation of existing
cardiac rhythm abnormalities
or the induction of arryth-
mias, as a result of exposure
to fluorocarbon refrigerant
gases (freons). Such indivi-
duals should be evaluated by
local medical authorities be-
fore working in environments
where potential freon exposure
may occur.
(7) Refer to figure 6-2 and charge
refrigerant system. -
5-30.
Quench Thermal Expansion Valve.
a. General.
The quench thermal ex-
pansion. valve is hermetically sealed and
cannot be repaired.
5-25
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