Accumulator HVAC: Service and Repair

Evaporator and Blower Assembly Component View:

Accumulator Replacement:

The accumulator assembly has a service replacement kit which includes two seals (O-rings) for the inlet and outlet connections. The desiccant is NOT serviced separately- it is pant of the sealed accumulator assembly. Refer to "Refrigerant Oil Distribution" for presence of refrigerant oil and service conditions when removing the accumulator from the vehicle to measure the oil.


Replace the accumulator when:

1. A physical perforation produces a leak.

2. The (orifice) screen experiences continued or repeated plugging.

3. An evaporator fails because of internal and external corrosion.


REMOVE OR DISCONNECT

1. Negative battery cable.

2. Refrigerant from the system.

3. Electrical connection (154).

4. Inlet line (108) at the accumulator (4).

5. Evaporator outlet line (158) at the accumulator (4).

^ Cap or plug the open lines.

6. Clamp (150) and screw (148).

7. Accumulator (4).


IMPORTANT: Drain excess refrigerant into a clean container. Measure and add new oil.


INSTALL OR CONNECT

1. Clamp (150) to the accumulator (4).

2. Accumulator (4) to the evaporator core (143) with screw (140).

3. Inlet line (108) from the evaporator core (143).


IMPORTANT: Add 0.057 kg (2 oz.) of clean refrigerant oil PLUS an amount equal to that drained.

^ Use clean 525 viscosity refrigerant oil on the seals.

^ Tighten connections to 24 Nm (18 ft. lbs.).


4. Electrical connection (154).

5. Negative battery cable.

6. Refrigerant to the system.

^ Evacuate, charge and leak test.