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 TM 5-4120-273-15
REPAIR INSTRUCTIONS
Section I. COMPRESSOR
6-2. Compressor
6-1. General
The compressor is hermetically sealed and cannot
be repaired. In case of a failure the compressor
must be replaced.
Section II. CONDENSER COIL, EVAPORATOR COIL
(2) Remove the (8) screws holding the con-
6-3. General
denser coil grille, reference figure 3-4. These (8)
The evaporator and condenser coils must be re-
screws also hold the condenser to the frame.
moved from the air conditioner for repair and re-
(3) In order to remove the condenser coil
placement.
remove 3 screws holding filter-drier bracket to
shell, refer to figure 3-6.
(4) To remove these 3 screws from filter-
drier bracket you have to remove the front access
a. Removal. Remove screws (6) that hold evap-
panel figure 3-5, remove junction box and control
orator coil to mounting bracket. Refer to figure
box, figure 3-13.
3-16 and remove evaporator coil.
(5) Pull condenser coil, refer to figure 3-4
b. Repair. Repair minor leaks or holes by sol-
from unit and unsolder as required.
dering with silver solder (class 4 or 6A QQS-561)
per MIL-B-7883. If damage is excessive replace
b. Repair. Repair minor leaks or holes by sol-
evaporator coil.
dering with silver solder (class 4 or 6A QQS-
561) per MILB-7883. If damage is excessive re-
evaporator coil.
place condenser coil.
(1) Leak test the entire system. Refer to
c. Installation.
(1) Replace condenser coil.
(2) Evacuate the system (para 5-21c).
(2) Leak test the entire system. Refer to
(3) Recharge the system (para 5-21d).
(3) Evacuate the system (para 5-21c).
6-5. Condenser Coil
(4) Recharge the system (para 5-21d).
a. Removal.
(5) Replace screws in filter-drier bracket.
(1) Evacuate the system, reference para-
(6) Replace condenser coil grille, figure
graph 5-21.
3-4.
Section III. HIGH PRESSURE SWITCH, LOW PRESSURE
SWITCH, FAN SPEED PRESSURE SWITCH
b. Removal.
a. General. The high pressure switch prevents
the compressor from operating if the head pres-
condenser fan refer to paragraph 3-18 and 320.
sure exceeds 445 psig.
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