Compressor HVAC: Service and Repair
REPLACEMENT1. DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2. EVACUATE REFRIGERANT HFC-134A (R134A)
3. REMOVE AIR CLEANER INLET NO.1
4. REMOVE FAN AND GENERATOR V BELT
5. REMOVE ENGINE UNDER COVER NO.1
6. DISCONNECT COOLER REFRIGERANT DISCHARGE HOSE NO.1
a. Remove the nut and disconnect the cooler refrigerant discharge hose No.1.
b. Remove the O-ring from the cooler refrigerant discharge hose No.1.
NOTE: Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.
7. DISCONNECT COOLER REFRIGERANT SUCTION HOSE NO.1
a. Remove the bolt and disconnect the cooler refrigerant suction hose No.1.
b. Remove the O-ring from the cooler refrigerant suction hose No.1.
NOTE: Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering.
8. REMOVE COMPRESSOR MOUNTING BRACKET NO.1
a. Remove the bolt, nut and compressor mounting bracket No.1.
9. REMOVE W/PULLEY COMPRESSOR ASSEMBLY
a. Disconnect the connector.
b. Remove the 2 bolts and w/ pulley compressor assembly.
10. ADJUST COMPRESSOR OIL
a. When replacing the compressor and magnetic clutch with a new one, after gradually removing the refrigerant gas from the service valve, drain the following amount of oil from the new compressor and magnetic clutch before installation.
Standard:
(Oil capacity inside the new compressor: 130 + 15 cc (4.4 + 0.5 fl.oz)) - (Remaining oil amount in the removed compressor) = (Oil amount to be removed from the new compressor when replacing)
NOTE:
- When checking the compressor oil level, observe the precautions on the air conditioning radiator assembly removal/installation.
- Because compressor oil remains in the pipes of the vehicle, if a new compressor and magnetic clutch is installed without removing some oil inside, the oil amount becomes too much, preventing heat exchange in the refrigerant cycle and causing refrigerant failure.
- If the remaining oil in the removed compressor and magnetic clutch is too small in volume, check for oil leakage.
- Be sure to use ND-OIL 8 or equivalent for compressor oil.
11. TEMPORARILY TIGHTEN W/PULLEY COMPRESSOR ASSEMBLY
a. Temporarily tighten the w/pulley compressor assembly with the 2 bolts.
b. Connect the connector.
12. INSTALL COMPRESSOR MOUNTING BRACKET NO.1
a. Install the compressor mounting bracket No.1 with the bolt and nut.
Torque:
Bolt: 49 Nm (500 kgf.cm, 36 ft.lbf)
Nut: 30 Nm (306 kgf.cm, 22 ft.lbf)
13. FULLY TIGHTEN W/PULLEY COMPRESSOR ASSEMBLY
a. Fully tighten the w/pulley compressor assembly with the 2 bolts.
Torque: 49 Nm (500 kgf.cm, 36 ft.lbf)
14. INSTALL COOLER REFRIGERANT SUCTION HOSE NO.1
a. Remove the attached vinyl tape from the hose.
b. Sufficiently apply compressor oil to the new O-ring and fitting surface of the compressor and magnetic clutch.
Compressor oil: ND-OIL 8 or equivalent
c. Install an O-ring to the cooler refrigerant suction hose No.1.
d. Install the cooler refrigerant suction hose No.1 to the compressor and magnetic clutch with the bolt.
Torque: 9.8 Nm (100 kgf.cm, 7 ft.lbf)
15. INSTALL COOLER REFRIGERANT DISCHARGE HOSE NO.1
a. Remove the attached vinyl tape from the hose.
b. Sufficiently apply compressor oil to the new O-ring and fitting surface of the compressor and magnetic clutch.
Compressor oil: ND-OIL 8 or equivalent
c. Install an O-ring to the cooler refrigerant discharge hose No.1.
d. Install the cooler refrigerant discharge hose No.1 to the compressor and magnetic clutch with the nut.
Torque: 9.8 Nm (100 kgf.cm, 7 ft.lbf)
16. INSTALL FAN AND GENERATOR V BELT
17. INSTALL AIR CLEANER INLET NO.1
18. CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
19. CHARGE REFRIGERANT
20. WARM UP ENGINE
21. INSPECT FOR REFRIGERANT LEAKAGE