Service Port HVAC: Service and Repair

Needle Valve

Special tools:
951 1204
981 1994

NOTE: The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Preparatory work

Draining refrigerant

Drain the refrigerant from the system. See Refrigerant, draining.

Removal

Removing the needle valve / service valve





Remove the needle valve in the service valve. Use: 951 1204.

Installation

Installing the needle valve / service valve

Install the needle valve. Use: 951 1204.
Use: 981 1994 and Tighten, see: Specifications 108097493>.

NOTE: Use only your finger and thumb when tightening the needle valve to avoid damage to the valve seal.

Finishing

Checking the function and leak tracing

Vacuum pump the air conditioning (A/C) system. See: Vacuum pumping.
Fill the air conditioning (A/C) system with refrigerant. See: Refrigerant, filling.
Leak trace the air conditioning (A/C) system. See: Leak detection, tracer agent or: Leak tracing, electronic leak tracer.

Checking the performance

Carry out a performance test on the climate control unit. See: Climate control system, check.