Coupler HVAC: Service and Repair

Servicing Dual O-Ring Joints:

Tools Required:
J 39500 Air Conditioning Refrigerant Recovery, Recycling and Recharging (ACR4) System
J 38042-Dual O-ring Joint Tool

NOTICE: The use of proper wrenches when loosening or making connections is important. A backup wrench should be used on the brazed or welded fitting to prevent distortion of A/C lines.

Disassemble

1. Recover refrigerant from A/C system.
2. Place tool J 38042 on the refrigerant line directly behind dual O-ring joint female nut and hold pressure against nut.
3. Back off female nut until dual O-ring joint seal is broken, thus aiding in seal separation.
4. Once seal is broken, slightly tighten female nut to facilitate tool removal; then remove female nut and separate connection.

Remove or Disconnect

1. O-rings.
^ Use non-metallic tools to minimize chance of Impairing seal surfaces.

Inspect
1. Line for kinks and dents.
2. Connection for burrs and nicks.

Install or Connect

1. O-rings.
^ Lubricate O-rings with 525 refrigerant oil prior to installation.

Assemble

1. Align end forms for pilot-to-bore insertion.
^ Oil bore with small amount of refrigerant oil prior to assembly.
2. Push together completely.
3. Female nut.

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

4. Evacuate, charge and leak test the A/C system.