PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - continued

TM 5-4120-374-13

Adjusted

The sight glass may be inspected by

looking through the louvers in the

left side panel. If you cannot see the

glass through the left side panel, then

remove the rear panel.

a. Remove fourteen (14) screws securing panel to housing and

remove rear panel.

b. With the air conditioner operating and providing cooling

air, inspect sight glass.

c. Yellow appearance indicates moisture in system and bubbles

or milky flow indicate low refrigerant charge.

d. Report presence of these conditions to Direct Support

maintenance personnel.

e. Align holes in rear panel with holes in housing. Secure rear

panel with fourteen (14) screws.

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