Accumulator HVAC: Service and Repair

The accumulator assembly service replacement part includes O-rings (as necessary) for connections. The desiccant within the shell is NOT serviced separately - it is part of the sealed accumulator assembly.

The accumulator assembly should be replaced ONLY when the shell is perforated and a refrigerant leak is found, or the system has been open to the atmosphere for an extended period. Accumulators do not require periodic replacement due to the following changes:

^ Use of improved desiccant.
^ Use of improved hose material and increased use of metal lines, both of which reduces the ability of moisture to enter the refrigerant system.

Tool Required:
J 39500 R-134a Refrigerant Recovery, Recycling, and Recharging Station

Remove or Disconnect

1. Negative battery cable.
2. Recover refrigerant.
3. Cruise control stepper motor bracket, and position aside. (if equipped).
4. Refrigerant lines at the accumulator. Discard O-ring seals.
5. Clamp on accumulator bracket and accumulator.

Install or Connect

1. Accumulator and bracket clamp.

Tighten
^ Screw to 8 N.m (71 lb in).

Important
^ Add required amount of new refrigerant oil.

2. Refrigerant lines at the accumulator using new O-ring seals.

Tighten
^ Fitting to 24 N.m (18 lb ft).

3. Cruise control stepper motor bracket.
4. Negative battery cable.

Tighten
^ Bolt to 16 N.m (12 lb ft).

5. Evacuate and charge the A/C system.