Compressor HVAC: Service and Repair

REMOVAL
1. Disconnect the battery negative remote cable.

Drive Belt:

2. Loosen and remove drive belt.
3. Disconnect compressor clutch wire lead.
4. Recover refrigerant system with R-134a recovery unit.

A/C Lines:

5. Remove refrigerant lines from compressor.

Lower Attaching Bolts:

Upper Attaching Bolts:

6. Remove compressor attaching bolts.

Compressor Removal:

7. Remove compressor.

INSTALLATION
1. Position the compressor on the mount.
2. Install the compressor attaching bolts. Tighten bolts to 41 N.m (30 ft. lbs.) torque.
3. Install drive belt.
4. Install refrigerant hoses and new seals.
5. Connect the clutch wire.
6. Charge the system.
7. Connect the negative cable to the battery

REFRIGERANT OIL LEVEL CHECK
When an air conditioning system is first assembled, all components (except the compressor) are refrigerant oil free. After the system has been charged with (R-134a) refrigerant and operated, the oil in the compressor is dispersed through the lines and components. The evaporator, condenser, and receiver/drier will retain a significant amount of oil. Refer to the A/C Component Refrigerant Oil Capacities table. When a component is replaced, the specified amount of refrigerant oil must be added. When the compressor is replaced, the amount of oil that is retained in the rest of the system must be drained from the replacement compressor. When a line or component has ruptured and oil has escaped, the compressor should be removed and drained. The receiver/drier must be replaced along with the ruptured part. The oil capacity of the system, minus the amount of oil still in the remaining components, can be measured and poured into the suction port of the compressor.

Example: On an A/C system the evaporator retains 60 ml. (2 oz.). The condenser retains 30 ml. (1 oz.) of oil, and system capacity may be 150 ml. (5.00 oz.) of oil.

150 ml. minus 90 ml. equals 60 ml. (2.00 oz.).

Component Capacity
System 150ml (5.00 fl oz)
Condenser 30 ml (1.00 fl oz)
Evaporator 59 ml (2.00 fl oz)
Filter/Drier 30 ml (1.00 fl oz)
Line Blown 44 ml (1.50 fl oz)

CAUTION: The refrigerant oil used in a R-134a A/C system is unique. Use only oils which were designed to work with R-134a refrigerant. The oil designated for this vehicle is ND 8 PAG (polyalkalene glycol).