COMPRESSOR APPLICATION
| CAUTION | DO NOT exceed A/C system refrigerant oil capacity, when servicing system. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS . |
Note. See the COMPRESSOR SERVICING article for compressor servicing procedures.
| Application | Compressor |
|---|---|
| A4 & A6 | Zexel 6-Cyl Or Nippondenso |
| Cabriolet | Zexel 6-Cyl. |
| 90 | Zexel 6-Cyl. |
COMPRESSOR APPLICATION
REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS
Note. Due to late changes, always refer to underhood A/C specification label in engine compartment or A/C compressor label while servicing A/C system. If A/C specification label and specifications within this article differ, always use label specifications.
REFRIGERANT OIL & R-134a REFRIGERANT CAPACITY
| CAUTION | DO NOT exceed A/C system refrigerant oil capacity, when servicing system. |
Only NEW , moisture-free refrigerant oil should be used in the air conditioning system. This oil is highly refined and dehydrated so moisture content is less than 10 parts per million. The oil container must be tightly closed at all times when not in use, or moisture from the air will be absorbed into the refrigerant oil.
| Application | (1) Oil Ounces | Refrigerant Ounces |
|---|---|---|
| All Models | (2) 7.8-9.2 | 23.0-24.8 |
| (1) Total system capacity, unless otherwise noted. (2) Use SP-10 Oil (Part No. G 052 154 A2). | ||
| (1) | Total system capacity, unless otherwise noted. |
| (2) | Use SP-10 Oil (Part No. G 052 154 A2). |
REFRIGERANT OIL & R-134a REFRIGERANT CAPACITY (1995)
| Application | (1) Oil Ounces | Refrigerant Ounces | |
|---|---|---|---|
| A4 | |||
| Nippondenso | (2) 6.9-10.1 | 23-24.8 | |
| Zexel | (2) 7.8-9.2 | 23.0-24.8 | |
| A6 | |||
| Nippondenso | (2) 7.8-9.2 | 26.5-28.2 | |
| Zexel | (2) 7.8-9.2 | 23.0-24.8 | |
| Cabriolet | (2) 7.8-9.2 | 23.0-24.8 | |
| (1) Total system capacity, unless otherwise noted. (2) Use SP-10 Oil (Part No. G 052 154 A2) on Zexel compressor. Use PAG Oil (Part No. G 052 300 A2) on Nippondenso compressor. | |||
| (1) | Total system capacity, unless otherwise noted. |
| (2) | Use SP-10 Oil (Part No. G 052 154 A2) on Zexel compressor. Use PAG Oil (Part No. G 052 300 A2) on Nippondenso compressor. |
REFRIGERANT OIL & R-134a REFRIGERANT CAPACITY (1996)
DISCHARGING SYSTEM
Discharge A/C system, using approved refrigerant recovery/ recycling equipment. Always follow recovery/recycling equipment manufacturer's instructions. After refrigerant recovery process is completed, the amount of compressor oil removed must be measured and the same amount added to A/C system.
DISCONNECTING LINES & FITTINGS
After system is discharged, carefully clean area around all fittings to be opened. Always use 2 wrenches when tightening or loosening fittings. Some refrigerant lines are connected with a coupling. Special tools may be required to disconnect lines. Cap or plug all openings as soon as lines are removed. Remove caps until connections of lines and fittings are to be completed.
CONNECTING LINES & FITTINGS
Note. All R-134a based systems use 1/2"-16 ACME threaded fittings. Ensure all replacement parts match the connections of the system being worked on.
Always use a new gasket or "O" ring when connecting lines or fittings. Coat "O" ring with refrigerant oil and ensure it is not twisted during installation. Always use 2 wrenches to prevent damage to lines and fittings.
PLACING SYSTEM IN OPERATION
After component service or replacement has been completed and all connections have been made, evacuate system thoroughly with a vacuum pump. Charge system with proper amount of refrigerant and perform leak test. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS for system capacities. Check all fittings that have been opened. After system has been leak tested, check system performance.
Note. Most compressors are pre-charged with a fixed amount of refrigerant (shipping) oil. Drain compressor oil from new compressor and add refrigerant oil to new compressor according to amount removed from old compressor. Always refer to underhood A/C specification label or A/C compressor label while servicing A/C system.
NIPPONDENSO - 6 & 10-CYLINDER
A new compressor is shipped with refrigerant oil. Drain and measure oil from old compressor. Drain refrigerant oil from new compressor and add 2.7 ounces of new refrigerant oil to new compressor. If amount removed from old compressor is greater than 2.7 ounces, add amount greater than 2.7 ounces to either evaporator or receiver-drier. If any other major components are replaced, add refrigerant oil as specified. See COMPONENT REFRIGERANT OIL CAPACITIES table.
| Component | Ounces |
|---|---|
| Compressor | (1) 6.9-10.1 |
| Condenser | (2) 0.3 |
| Evaporator | (2) 0.7 |
| Receiver-Drier | (2) 1.0 |
| Refrigerant Lines | (2) 0.3 |
| (1) Amount shipped in new compressor. After adding oil to compressor, rotate compressor 10 times before operating system to prevent compressor damage. (2) Plus amount drained from component. | |
| (1) | Amount shipped in new compressor. After adding oil to compressor, rotate compressor 10 times before operating system to prevent compressor damage. |
| (2) | Plus amount drained from component. |
COMPONENT REFRIGERANT OIL CAPACITIES (NIPPONDENSO)
ZEXEL - 6-CYLINDER
- The use of refrigerant recovery/recycling is recommended by manufacturer. After refrigerant recovery process is completed, the amount of compressor oil removed must be measured and the same amount added to A/C system.
- Add one ounce of refrigerant oil when replacing accumulator. When replacing condenser, add amount drained from condenser plus 1/3 ounce of refrigerant oil. When replacing evaporator, add amount drained from evaporator plus 2/3 ounce of refrigerant oil.