TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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14-21. EXPANSION VALVE REPLACEMENT (Cont'd) TM 9-2320-280-34 Change 1 14-115 NOTE Perform steps 1 through 3 for R-12 systems only. 1. Lubricate O-rings (5), (9), and (13) with refrigerant oil and install on inlet tube (4), sight glass tube (11), and pressure tube (7). 2. Connect expansion valve (6) to sight glass tube (11) and inlet tube (4). 3. Connect pressure tube (7) to evaporator outlet tube (1). NOTE Perform steps 4 through 6 for FR-12 systems only. 4. Lubricate O-ring (5) with refrigerant oil, and install O-ring (5) and thermo expansion valve (6) on inlet tube (4). 5. Lubricate O-ring (13) with refrigerant oil, and install O-ring (13) and pressure tube (7) on evaporator outlet tube (1). 6. Lubricate two O-rings (9) with refrigerant oil, and install O-rings (9) and sight glass tube (11) on sight glass (15) and thermo expansion valve (6). 7. Install control tube (12) on evaporator outlet tube (1) with clamp (2). 8. Wrap evaporator outlet tube (1) and control tube (12) with moisture seal (3) and work moisture seal (3) together to form tight seal. NOTE Perform step 9 for FR-12 systems only. 9. Secure sight glass tube (11) to evaporator (14) with clamp (8) and screw (10). FOLLOW-ON TASKS: • Close evaporator blower housing (TM 9-2320-280-20). • Evacuate and charge air-conditioning system (para. 14-17).