Connections With SCHRADER Valve (Needle Valve)

Fig 1: Exploded View Of Connections With Schrader Valve

Courtesy of AUDI OF AMERICA, LLC

-A- Service connection (soldered in)
-B- Valve insert (Schrader valve or needle valve)
-C- O-ring (belonging to the valve)
-D- Cap with seal

NOTE:

After connecting, install the hand wheel for the service coupling just far enough into the quick-release coupling adapter until the valve is securely opened inside the service connection (pay attention to the pressure gauge, do not put too much pressure on the valve).

For removing and installing the valve set -B- when the refrigerant circuit is evacuated, for example, use an adapter from the Refrigerant Sockets :T10364 .

Tighten the valve insert -B- very carefully because the tightening specification is very small.

There are different versions of these valves and therefore there are different tightening specifications. Valve insert -B- with a VG5 (5.2 x 0.7 mm, tire valve) thread has a tightening specification of 0.4 Nm ± 0.1 Nm; a valve insert with a M6 x 0.75 mm thread has a tightening specification of 0.9 Nm ± 0.1 Nm, and a valve insert with a M8 x 1.0 mm thread has a tightening specification of 2.0 Nm ± 0.2 Nm.

There are different versions of these valves, valve inserts and their respective sealing caps. Be sure to use the correct valve version and the correct sealing cap allocation. Refer to the Parts Information.