Quick-Release Connections On Refrigerant Lines
The quick-release coupling connectors may be unlocked and opened only if the refrigerant circuit is empty.
This illustration shows the quick-coupling connection with a refrigerant line with an inner heat exchanger that is installed in the Audi A4 from MY 2008 and on the Audi A5 Coupe from MY 2008. Refer to REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT (R1234yf) (vehicle-specific repair information). (vehicle-specific repair information).
The retaining ring -A- must be opened using, for example, the Air Conditioner Couplings Release Tool:T40149 in order to remove the refrigerant line -D-. Refer to REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT (R1234yf) (vehicle-specific repair information). (vehicle-specific repair information).
The quick-release coupling connectors -B and G- are to be replaced after removing the refrigerant line with the respective support ring -E- or -H- and O-ring -F or J-. Refer to REFRIGERANT CIRCUIT / REFRIGERANT CIRCUIT (R1234yf) (vehicle-specific repair information). (vehicle-specific repair information) and the parts information).
A - Retaining ring (inside the quick-release coupling connector, high pressure side)
B - Quick-release coupling connector with retaining ring "high pressure side"
C - Refrigerant line with an inner heat exchanger
D - Refrigerant line "high pressure side"
E - Support ring "high pressure side"
F - O-ring "high pressure side"
G - Quick-release coupling connector with retaining ring "low pressure side"
H - Support ring "low pressure side"
J - O-ring "low pressure side"
There are different quick-release coupling versions -A and D-. The refrigerant lines -C-, for example, can unlocked and removed using the Air Conditioner Couplings Release Tool:T40149/1 in the same manner for both versions of the quick-release couplings.
The check pins on the -B- quick-release couplings -A- installed at SOP are visible -C-, when the locked refrigerant line -C- is pulled in the direction of arrow.
Beginning with MY 2010, as a running change, the quick-release coupling -D- and the refrigerant line -C- are being installed in the same manner as the quick-release coupling -A-. If the refrigerant line -C- is pulled in the direction of arrow after assembling, the ring -E- will come out of the quick-release coupling -D- installed and will show that the retaining ring -F- is completely latched to the refrigerant line -C-. Then the ring -E- can be removed from the refrigerant line -C-.