Expansion Valve: Service and Repair
REMOVAL1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
HINT: At the time of installation, please refer to the following item. Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrigerant.
Specified amount : 700 ± 50 g (24.69 ± 1.76 oz.)
2. REMOVE BLOWER UNIT
3. DISCONNECT LIQUID AND SUCTION TUBES FROM A/C UNIT OUTLET FITTINGS
Remove the 2 bolts and disconnect the both tubes.
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.
HINT: At the time of installation, please refer to the following item.
Lubricate 2 new O-rings with compressor oil and install the tubes.
4. DISCONNECT EQUALIZER TUBE FROM EPR
Remove the bolt and disconnect the tube.
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.
HINT: At the time of installation, please refer to the following item.
Lubricate 2 new O-rings with compressor oil and install the tubes.
5. REMOVE LIQUID TUBE AND SUCTION TUBES FROM EVAPORATOR
a. Pry out the packing.
HINT: At the time of installation, please refer to the following item.
Do not reuse the packing.
b. Using a hexagon wrench, remove the 3 bolts and tubes.
NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.
HINT: At the time of installation, please refer to the following item. Lubricate 2 new O-rings with compressor oil and install the tubes.
6. REMOVE EXPANSION VALVE
a. Pry out the packing.
HINT: At the time of installation, please refer to the following item.
Do not reuse the packing.
b. Remove the holder and disconnect the heat sensing tube.
c. Loosen the 3 nuts and remove the expansion valve.
Torque:
14 mm nut : 10 N.m (100 kgf.cm, 7 ft.lbf)
19 mm nut : 14 N.m (140 kgf.cm, 10 ft.lbf)
24 mm nut : 22 N.m (225 kgf.cm, 16 ft.lbf)
HINT: At the time of installation, please refer to the following item.
Lubricate 3 new O-rings with compressor oil and install the valve.
INSTALLATION
Installation is in the reverse order of removal.