Figure 4-76. Sight Glass

TM 5-4120-359-14

Figure 4-76. Sight Glass

b. Removal

(1) Discharge the refrigerant system per paragraph 4-5.

(2) While purging the system with nitrogen, debraze the tubing. (See paragraphs 4-6 and 4-7.)

(3) Using a screwdriver and wrench, remove two screws and lock nuts and sight glass bracket.

(4) Remove the sight glass.

Installation

(1) Position sight glass in unit.

(2) Using screwdriver and wrench, secure sight glass with bracket and two screws and lock nuts. Be sure that

sight glass is centered on opening in housing.

(3) While purging the system with nitrogen, braze the tubing joints. (See paragraphs 4-6 and 4-7.)

(4) Replace the dehydrator. (See paragraph 4-73)

(5) Leak test all newly connected joints and those in the repair area. (See paragraph 4-8.)

(6) Evacuate and charge the refrigerant system. (See paragraphs 4-9 and 4-10.)

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