Air Conditioning Line (Peanut) Fitting
Disconnect
1. CAUTION: Support the female fitting with a wrench to prevent the tubes from twisting.
Remove the nut from the peanut fitting.

2. Pull the peanut fitting apart.

3. CAUTION: Do not use metal tools to remove the O-ring seal. They can cause axial scratches across the O-ring seal groove, resulting in refrigerant leaks.
Remove the O-ring seal with a non-metallic tool.

Connect
1. Clean all dirt or foreign material from the fittings.
2. CAUTION: Use only the new O-ring seals. The use of any O-ring seals other than those specified in the Ford Master Parts Catalog may result in intermittent leakage during vehicle operation.
Install the O-ring seal.
- Lubricate the O-ring seal with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ- 19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231- B.

3. Lubricate the inside of the fittings with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231- B.
4. NOTE: When correctly assembled, the male and female fittings should be flush.
Assemble the male and female fittings together.

Test yourself
A quick Ford Mustang quiz: every answer comes with an explanation and a link to the manual page.