Audi A4: Testing Equipment, Tools and Materials
General Information
Note
This list outlines the testers, tools and materials required
for expert refrigerant circuit repair work.
- For tools and materials available from the distribution
center or importer. Refer to
→ Chapter "Tools and Materials Available from Distribution
Center or Importer".
- For commercially available tools and materials. Refer to
→ Chapter "Commercially Available Tools and Materials".
- For improvised tools. Refer to
→ Chapter "Improvised Tools".
Tools and Materials Available from Distribution Center or Importer
Commercially Available Tools and Materials
Improvised Tools
Tools and Materials Available from Distribution Center or Importer
Service station/A/C Service Station (this illustration shows
), currently available A/C service stations. Refer to the Parts
Catalog (Tools; Special Tools and Equipment: A/C and Heating).
- Work procedures: The operations "testing, extraction
(recycling), evacuation and charging" are to be performed in
line with the relevant operating instructions.
- The filters and dryers installed are to be replaced at the
latest at the end of the period of use specified in the
operating instructions and whenever the station has been drained
(keep replacement filter to hand. Available from equipment
manufacturer. Refer to A/C service station operating
instructions.
- Use can also be made of service stations not described here.
Refer to the Parts Catalog (Tools; Special Tools and Equipment:
A/C and Heating).
- Currently available A/C service stations are equipped with a
program for flushing the refrigerant circuit; the flushing
equipment required for flushing is also included in delivery of
these A/C Service Stations. Refer to the Parts Catalog (Tools;
Special Tools and Equipment: A/C and Heating).
Note
- This A/C service station has the following known units:
charging cylinder, pressure gauge set, vacuum pump, shutoff
valves and charging hoses.
- One quick-release coupling each (for service connections on
high and low-pressure side) is included in the scope of delivery
of this service station.
- Current vacuum display (LED) appears after pressing the
"Evacuate" button again.
Leak detection unit, currently available leak detection
units. Refer to the Parts Catalog (Tools; Special Tools and
Equipment: A/C and Heating).
Leak detection system (for example Leak Detection Kit
-VAS6201A-, currently available leak detection systems. Refer to
the Parts Catalog (Tools; Special Tools and Equipment: A/C and
Heating).
Puller for A/C Clutch Set -VAG1719- (for "Zexel" A/C
compressor)
A/C Adapter Set -VAG1785-
Adapter for cleaning refrigerant circuit (flush with
refrigerant R134a. Refer to
→ Chapter "Refrigerant Circuit, Cleaning (Flushing), with
Refrigerant R134a"; or blow through with compressed
air and nitrogen. Refer to
→ Chapter "Refrigerant Circuit, Flushing with Compressed Air and
Nitrogen".)
A - 5/8"-18 UNF thread for conical seal
B - Union nut (for connection with O-ring) with thread
- A/C Adapter Set - M18 x 1.5 -VAG1785/1-
- A/C Adapter Set - M20 x 1.5 -VAG1785/2-
- A/C Adapter Set - M24 x 1.5 -VAG1785/3-
- A/C Adapter Set - M28 x 1.5 -VAG1785/4-
Adapter
A - 5/8"-18 UNF thread for conical seal
B - Threaded connection for O-ring
- A/C Adapter Set - M18 x 1.5 -VAG1785/5-
- A/C Adapter Set - M20 x 1.5 -VAG1785/6-
- A/C Adapter Set - M24 x 1.5 -VAG1785/7-
- A/C Adapter Set - M28 x 1.5 -VAG1785/8-
Valve adapter
A - 5/8"-18 UNF thread for conical seal
B - Internal thread with valve opener
- M10 x 1.25 VAG1785/9 (for connections with valve on
high-pressure side)
- M10 x 1.5 VAG1785/10 (for connections with valve on
high-pressure side)
Note
- A Schrader valve is screwed into connection
-A-.
- A valve opener must be installed in the charging hose
connection.
- Various adapters from adapter set are also part of the
Refrigerant Circuits Adapter Set 1 -VAS6338/1-.
A/C Adapter Set -VAG1786-
A - A/C Adapter Set - Adapter 1 -VAG1786/1- (only for
connections with small valve insert on low-pressure side)
B - Charging hose with union nut 5/8"-18 UNF (short version)
C - A/C Adapter Set - Adapter 2 -VAG1786/2-.
Note
- For connections with large valve insert (standard on
"Zexel/Valeo" compressors, gradual change to small valve insert
from 10/1994), use is to be made of adapter VAG1785/10 (remove
valve from adapter VAG1785/10 or install valve opener in
charging hose -B-).
- Beginning from production year 2006, the name of the "Zexel"
A/C compressor was changed from "Zexel" to "Valeo".
Refrigerant Sockets -T10364-
Note
For removing and installing service connections and valve
units when the refrigerant circuit is empty.
READ NEXT:
Fin comb
Fill hoses
5/8"-18 UNF thread
Note
Use differently colored charging hoses (1800 mm long).
Have valve opener and spare seals to hand.
A charging hose in short version is also incl
SEE MORE:
Chassis
Steering
Tire Types
For general information on wheel/tire combinations, winter tires, snow
chains, and recommended tire manufacturers, refer to
→Wheel and Tire Guide; Rep. Gr.44
Drive Axle General Information
Apply a thin coat of assembly paste to the splines on the
outer joint b
General information
Each seat is equipped with a three-point safety
belt. Safety belts that are worn correctly are the
most effective way to reduce the risk of serious or
fatal injuries in a collision. Therefore, wear your
safety belt correctly and make sure that all vehicle
passengers are also wear