TM 9-4120-403-14
(7) If valve body flange was removed, purge the system with nitrogen and braze the two tubing joints. (See
(8) Coat three cage assembly gaskets with oil.
(9) Be sure that valve components are properly assembled and aligned and secure power assembly to body
flange.
(10) Secure valve assembly with two cap screws, lockwashers, flat washers, and spacers.
(11) Connect flare nut on external equalizer line to expansion valve.
(12 Insert the sensing bulb into its mounting clamps in its original position and tighten the screws and nuts. Be
sure the sensing bulb is making good metal-to-metal contact with the suction line.
(13) Cut to length and install insulation tubing over sensing bulb. Be sure insulation extends beyond both ends
of bulb.
(14) Wrap insulation tubing with one layer of insulation tape.
(15) Wrap each end of insulation tape with two layers of pressure-sensitive tape.
Follow-on procedures:
(1) Replace the dehydrator. (See para 5-23.)
(2) Purge system. (See para 5-8.)
(3) Leak test all newly connected joints and those in the repair area. (See para 5-10.)
(4) Evacuate the refrigerant system. (See para 5-11.)
(5) Charge the refrigerant system, but do not operate unit. (See para 5-12.)
(6) Install fan motor. (See para 4-57.)
(7) Run air conditioner and check operation. (See para 5-12.)
(8) Install heater elements (HR1 thru HR6) and support. (See para 4-58.)
(9) Install top panel. (See para 4-16.)
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