Accumulator HVAC: Service and Repair

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

Replace the accumulator assembly only when the following conditions occur:
^ When the shell is perforated and a refrigerant leak is found
^ When the system has been open to the atmosphere for an extended period of time

Accumulators do not require periodic replacement due to the following changes:
^ Use of improved desiccant
^ Use of improved hose material
^ Increased use of metal tubes

The following repairs reduce the ability of moisture to enter the refrigerant system:
^ Improved hose material
^ Increased use of metal tubes

Refer to Refrigerant Recovery and Recharging

Removal Procedure

TOOLS REQUIRED
J 39500-B R-134a Refrigerant Recovery, Recycling and Recharging (ACR4) System

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

1. Disconnect the negative battery cable.
2. Use the J 39500-B in order to recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
3. Raise and support the vehicle.
4. Remove the cruise control stepper motor bracket. Position aside the bracket (if equipped).
5. Disconnect the refrigerant lines at the accumulator (1). Discard the O-ring seals.
6. Remove the clamp on the accumulator bracket (3).
7. Remove the accumulator (1) from the vehicle.

Installation Procedure
1. Install the accumulator (1).

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the accumulator bracket (3) clamp.

Tighten
Tighten the bolt to 8 N.m (71 lb in).

IMPORTANT: Add the required amount of new refrigerant oil. Refer to Refrigerant Oil Distribution. Service and Repair

3. Install the refrigerant lines at the accumulator. Use the O-ring seals.

Tighten
Tighten the bolt to 24 N.m (18 lb ft).

4. Install the cruise control stepper motor bracket.
5. Connect the negative battery cable.

Tighten
Tighten the bolt to 16 N.m (12 lb ft).

6. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.