Service Gauge Port Valves

The service gauge port fitting is an integral part of the refrigerant line or component.

• Special couplings are required for both the high-side and low-side service gauge ports.
• A very small amount of leakage is always detectable around the Schrader-type valve with the service gauge port valve cap removed, and is considered normal. A new Schrader-type valve core can be installed if the seal leaks excessively.
• The A/C  service gauge port valve caps are used as primary seals in the refrigerant system to prevent leakage through the Schrader-type valves from reaching the atmosphere. Always install and tighten the A/C  service gauge port valve caps to the correct torque after they are removed.

Fig 1: Service Gauge Port Valves With Torque Specification

Courtesy of FORD MOTOR CO.