TM 9-4120-399-14
5-23. EXPANSION VALVE. - Continued.
b. Removal.
(1) Restrain valve (1).
(2) Loosen three flare nuts (2), (3), and (4) on valve (1).
(3) Remove screw (5), lock washer (6), and nut (7) from clamp (8).
(4) Remove valve (1) from clamp (8).
(5) Unwrap existing suction line insulation from around sensing bulb (12) and remove
screw (9) and nut (10) from clamp (11) holding sensing bulb to suction line (13).
c. Installation.
CAUTION
Damaged capillary will cause unit to malfunction. Use care not to
damage or kink capillary.
(1) Coil sensing bulb (12) capillary into two loops.
(2) Secure sensing bulb (12) to suction line (13) with two clamps (11), two nuts (10),
and two screws (9) (supplied with valve).
(3) Place valve (1) in clamp (8).
(4) Restrain valve (1).
(5) Tighten three flare nuts (4), (3), and (2) on valve (1).
(6) Install screw (5), lock washer (6), and nut (7) in clamp (8).
(7) Rewrap existing suction line insulation around sensing bulb (12).
(8) Replace filter/dryer dehydrator (See para. 5-15).
(9) Leak test newly connected joints and those in the repair area. (See para. 5-10).
(10) Evacuate the system (See para. 5-11).
(11) Charge the system (See para. 5-12).
(12) Install intake (return air) guard (See para. 3-5).
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