TM 9-4120-370-14
TO 35E9-229-1
5-21. LIQUID INDICATOR (SIGHT GLASS)
Preliminary procedures:
Inspection
a.
(1)
Check that glass window is clean and not cracked or broken. Clean if dirty. Replace liquid indicator if
cracked or broken.
Check for evidence of leakage. Leak test if leak is suspected. Repair or replace as indicated.
(2)
b. Removal
(1) Using screwdriver, remove two screws and flat washers from rear while holding bracket so that it does not
drop down into unit.
(2) Remove bracket.
(3) Carefully flex tubing back and remove gasket and spacer.
(5) While purging the system with nitrogen, debraze the tubing. (See para 58 and para 59.)
(6) Remove liquid indicator.
Installation
c.
(1) Position liquid indicator in unit.
(2) While purging the system with nitrogen, braze the tubing joints. (See para 58 and para 59.)
(4) Leak test all newly connected joints and.those in the repair area. (See para 510.)
(5) Position bracket, spacer, and gasket and secure with two screws and flat washers.