Manifold Gauge Set Connection

R-134a Manifold Gauge Set:

SPECIAL SERVICE TOOL(S)

Service Gauge Port Valves
The high pressure service gauge port valve is located on the A/C manifold and tube.

The low pressure service gauge port valve is located on the suction accumulator/drier.

Service Gauge Port Valve:

The fitting is an integral part of the refrigeration line or component.
^ Special couplings are required for both the high side and the low side service gauge ports.
^ The Schrader-type valve core can be replaced if the seal leaks.
^ Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.







1. Turn both valves on the R-134a Manifold Gauge Set counterclockwise to close the low and high-pressure hoses to the center manifold and center hose.







2. Remove the A/C charging valve cap from the low-pressure service gauge port valve.







3. Remove the A/C charging valve cap from the high-pressure service gauge port valve.







4. Connect the R-134a Manifold Gauge Set low-pressure hose and the R-134a low side quick disconnect to the low-pressure service gauge port valve.







5. Connect the R-134a Manifold Gauge Set high-pressure hose and the R-134a high side quick disconnect to the high-pressure service gauge port valve.