Figure 4-10. Location of pressure relief valve

TM 5-4120-339-14

Figure 4-10. Location of pressure relief valve

4-14.

SERVICE VALVES.

a. Inspection.

(1) Turn the selector switch to the "OFF" position and disconnect the air conditioner from the electrical power

source.

(2) Refer to figure 4-11 and inspect the suction pressure service valve and the discharge pressure service

valve externally for obvious defects. Make sure that the valve caps are tightly in place, that the valve stems are tightly

closed, and that the cap nuts are seated securely on the valves.

(3) Refer to paragraph 4-4c and check the service valves for refrigerant leaks. Refer to paragraph 4-4d and

repair any leaks found.

b. Replace. If damage or defects are found which could impair serviceability, replace the suction service valve

and/or the discharge pressure service valve. Refer to paragraphs c and d for removal of defective valve or valves and the

installation of new valves.

Removal. (See figure 4-11.)

NOTE

Do not remove service valves unless one or both valves are to be replaced.

4-24