Compressor HVAC: Testing and Inspection

INSPECTION




1. INSPECT MAGNETIC CLUTCH CLEARANCE
a. Set the dial gage to the magnet clutch hub.
b. Connect the positive battery lead to terminal 3 of the magnet clutch connector and the negative lead to the earth wire. Turn on and off the magnet clutch and measure the clearance.

Standard clearance: 0.35 to 0.60 mm (0.013 to 0.023 in.)

If the measured value is not within the standard range, remove the magnet clutch hub and adjust it with magnet clutch washers.

NOTE: Adjustment should be performed with 3 or less magnet clutch washers.

c. Remove the compressor and magnetic clutch from the vise.
d. Install bracket with the 2 bolts.




2. INSPECT 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 form the new compressor and magnetic clutch before installation.

Standard: (Oil capacity inside new compressor and magnetic clutch: 120 + 15 cc (4.0 + 0.5 fl. oz.)) - (Remaining oil amount in the removed compressor and magnetic clutch) = (Oil amount to be removed when replacing)

NOTE:
- When checking the compressor oil level, observe the precautions on the cooler removal / installation.
- When a new compressor and magnetic clutch is installed without removing the oil remaining in the pipes (of the vehicle), the oil amount will become excessive, which prevents heat exchange in the refrigerant and causes 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-OIL8 or equivalent for compressor oil.




3. INSPECT MAGNET CLUTCH ASSEMBLY
a. Disconnect the connector from the magnet clutch assembly.
b. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to body ground, then check that the magnet clutch assembly is engaged.