Refrigerant Lines, Disconnecting From Quick-Release Couplings And Connecting: Removing
-- Turn off the ignition.
-- Discharge the refrigerant circuit. Refer to USING SERVICE STATION . For additional information, refer to OVERVIEW - REFRIGERANT CIRCUIT, NOT OPENING THE REFRIGERANT CIRCUIT, VEHICLES WITHOUT HIGH VOLTAGE SYSTEM and OVERVIEW - REFRIGERANT CIRCUIT, OPENING THE REFRIGERANT CIRCUIT, VEHICLES WITHOUT HIGH VOLTAGE SYSTEM (Refrigerant R134a, Servicing; Refrigerant Circuit, Using Service Station).
Depending on the allocation of the service connection to the refrigerant line and vehicle version, it may be necessary to remove the left additional reinforcement on the tower brace so that the service coupling of the A/C service station can be connected (for example, on the Audi Q5). Refer to OVERVIEW - SUSPENSION STRUT WITH MOUNTING BRACKET, SHOCK ABSORBER FORK, UPPER CONTROL ARM AND TOWER BRACE and A/C SYSTEM, GENERAL INFORMATION (Refrigerant R134a, Servicing; A/C System General Information).
There are different quick-release coupling versions -A- and -D-. The refrigerant lines -C- can be unlocked and removed using the Air Conditioner Couplings Release Tool T40149/1 in the same manner with both quick-release coupling versions.
The check pins on the -B- quick-release couplings -A- installed at the start of production are visible after installing the refrigerant line -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- installed 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- 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-.
If it is not possible to unlock the quick-couplings -A- and -B- using the Air Conditioner Couplings Release Tool T40149 without damaging them, then unlock them -A- and -B- using Disassembling Tool T40232 -C- three times on the circumference and loosen the ring -D- on the quick-couplings -A- and -B- and the refrigerant lines -E- and -F-. Remove the refrigerant pipes -E- and -F- from the quick-couplings -A- and -B-.
-- Clean the refrigerant lines -A- and -C- in the area of the quick-release coupling connectors.
-- Clean the refrigerant lines -A- and -C- in the area of the quick-release coupling connectors with a silicone-free lubricant.
The refrigerant lines adhere to the O-ring with the A/C is used; loosen the O-ring before mounting the release tool for air conditioner couplings, for example by pulling and pushing the refrigerant lines; never twist the refrigerant lines.
The Audi RS4 and the Audi RS5 have a block connector instead of quick-release connector. Removing and installing the block connector is same as removing and installing the block connector on the condenser. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING AT CONDENSER .
-- Press the refrigerant lines -A- and -C- by hand all way into the connecting piece -B- of the refrigerant line with the inner heat exchanger.
-- Connect the Air Conditioner Couplings Release Tool T40149/1 to the refrigerant line -A- all the way (the opening of the retaining ring can be heard and felt). When doing this, the retaining ring with will expand.
-- Remove the refrigerant line -A- using the Air Conditioner Couplings Release Tool from the connecting piece -B- of the refrigerant line with inner heat exchanger.
-- Connect the Air Conditioner Couplings Release Tool T40149/2 to the refrigerant line -C- all the way (the opening of the retaining ring can be heard and felt). When doing this, the retaining ring with will expand.
-- Remove the refrigerant line -C- using the Air Conditioner Couplings Release Tool from the connecting piece -B- of the refrigerant line with inner heat exchanger.
If the refrigerant lines cannot be pulled out or pushed in, then never twist them in the connector piece -C-.
In this case, open (or cut) the quick-release couplings -A- or -B- with, for example, the Retaining Ring T40232 and remove the retaining ring -D-.
When cutting the coupling, make sure not to damage the connector piece -A- of the refrigerant lint with inner heat exchanger.
Close all open lines and connections on the refrigerant line with suitable caps (avoid dirt and moisture from entering the system).
Loosen the connection on the quick-coupling connections using the Retaining Ring T40232.
-- Mount the disassembly tool -C- on the quick-couplings -A- or -B- and separate the coupling 3 times.
Be careful not to damage the connection area on the inner heat exchanger -G- and the refrigerant lines -E- and -F- when separating the quick-release coupling -A- and -B-.
Insert the cutter on the removal tool -C- into the quick-release coupling until the break at the cut location can be heard and felt.
-- Carefully bend open the cut quick-release coupling -A- or -B- (being careful not to damage the refrigerant line) and remove the retaining ring -D-.
-- Spray the refrigerant lines near the opened quick-release coupling with a silicone-free lubricant.
The refrigerant lines stick to the O-ring when the A/C system is working. Pulling and pushing the refrigerant line after spraying the lubricant can loosen the line from the O-ring making it easier to remove. Never twist the refrigerant lines.
-- Remove the refrigerant line -E- and -F- from the connection.
-- Seal off the open lines and connections on the refrigerant line with the inner heat exchanger with suitable caps (to keep dirt and humidity from getting in).