REMOVAL - TM-5-4120-374-130148

TM 5-4120-374-13

5-14. EXPANSION VALVE (CONT)

REMARKS

ACTION

LOCATION/lTEM

TOP AND RIGHT SIDE OF HOUSING

Refer to paragraph 5-7 and discharge refrigerant system.

5. Refrigerant System

Carefully unwrap thermostat switch sensing bulb from expansion valve

sensing line. Use care to prevent damage to sensing bulb.

6 . E x p a n s i o n V a l v e a . Unwrap insulation tape from sensing bulb.

b. Mark location and remove two (2) metal straps securing

sensing bulb.

c. Carefully unwrap thermostat switch sensing bulb from

expansion valve sensing line.

d. Unscrew and remove two (2) flare nuts and remove refrigerant

Iines from expansion valve.

e. Remove expansion valve.

Testing of expansion valve is to be done while the air conditioner is

operating and supplying cooling air. Exercise Extreme Caution.

7. Expansion Valve

a. Using a General Electric Type H-2 Halogen Test Detector

(or approved equal), check expansion valve for leaks.

b. Calibrate the detector with a General Electric LS-20 leak

standard (or approved equal) for a pure refrigerant leak rate

of 0.1 ounce per year.

c. Verify that there is NO leakage or damage.

d. Replace expansion valve if testing indicates that it is

defective.

5-36