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Mazda RX7 Air Conditioning Refrigerant Oil and R-134A

Mazda RX7 1993-1995 FD3S



COMPRESSOR APPLICATION


CAUTION: DO NOT exceed Air Conditioning system refrigerant oil capacity when servicing system.

COMPRESSOR APPLICATION


REFRIGERANT OIL AND REFRIGERANT SPECIFICATIONS


Due to late changes, always refer to underhood Air Conditioning specification label in engine compartment or AC compressor label while servicing AC system. If Air Conditioning specification label and specifications within this article differ, always use label specifications.

REFRIGERANT OIL AND R-134A REFRIGERANT CAPACITY
CAUTION: DO NOT exceed Air Conditioning 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.

REFRIGERANT OIL AND R-134a REFRIGERANT CAPACITY (1995)

REFRIGERANT OIL AND R-134a REFRIGERANT CAPACITY (1996)


SERVICING PRECAUTIONS


DISCHARGING SYSTEM
Discharge Air Conditioning 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 Air Conditioning system.

DISCONNECTING LINES AND 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 AND FITTINGS
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. Check all fittings that have been opened. After system has been leak tested, check system performance.

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 Air Conditioning specification label or Air Conditioning compressor label while servicing Air Conditioning system.



COMPRESSOR OIL CHECKING


FORD (HALLA) - FS-10 10-CYLINDER

B2300, B3000 AND B4000
1. Slowly discharge system. Remove Air Conditioning compressor. Drain compressor oil from suction and discharge ports. Measure amount drained and discard oil.
2. If amount drained from removed (old) compressor is between 3 and 5 ounces, add drained amount of new refrigerant oil into the NEW compressor.
3. If amount drained is less than 3 ounces, add 3 ounces. If amount drained is more than 5 ounces, add 5 ounces. Use new "O" rings on refrigerant lines. Install Air Conditioning compressor. Evacuate and charge Air Conditioning system. Perform leak test.
4. When replacing other Air Conditioning system components, add the following amount(s) of refrigerant oil.

COMPONENT REFRIGERANT OIL CAPACITIES (HALLA) - Ounces

NIPPONDENSO - ROTARY VANE

Miata AND RX7
If new compressor is shipped with refrigerant oil, drain and measure oil from old compressor. Remove refrigerant oil from new compressor equal to difference between amount drained from old compressor and amount shipped in new compressor. If new compressor is shipped without refrigerant oil, add same amount of oil that was drained from old compressor. If any other major components are replaced, add new refrigerant oil as specified.

COMPONENT REFRIGERANT OIL CAPACITIES (NIPPONDENSO)

NIPPONDENSO - 10-CYLINDER

MPV
Compressor oil checking procedures not available at time of publication.

PANASONIC - ROTARY VANE

Millenia
Compressor oil checking procedures not available at time of publication.

MX-3, MX-6, 626 AND 929
Drain and measure oil from old compressor. Add same amount drained from old compressor plus .5-.6 ounce of new refrigerant oil to replacement compressor. If any other major components are replaced, add refrigerant oil as specified.

COMPONENT REFRIGERANT OIL CAPACITIES (PANASONIC)

SANDEN - SCROLL

Protege
Drain and measure oil from old compressor. Add amount drained plus 0.2-0.3 ounce of new refrigerant oil to replacement compressor. If any other major components are replaced, add refrigerant oil as specified.

COMPONENT REFRIGERANT OIL CAPACITIES (SANDEN)



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Mazda RX-7 1993-1995 FD3S


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