During Compressor Replacement

FS-10 compressors shipped as service replacements MAY or MAY NOT contain oil.

The procedures for replacing oil are as follows:

During A/C Compressor Replacement
1. Prior to installing the replacement A/C compressor, drain the refrigerant oil from the removed A/C compressor into a clean calibrated measuring device.

To drain the oil, place the disc and hub assembly on the old compressor shaft so the shaft can be rotated.

Rotate the shaft by hand six (6) to eight (8) revolutions while pouring the oil from the ports. This effectively empties the A/C compressor of oil.

NOTE: The suction accumulator/drier and A/C evaporator core orifice should also be replaced when the A/C compressor is replaced.

2. Record the amount of oil removed from the old A/C compressor.
3. If the new FS-10 A/C compressor contains oil, drain the refrigerant oil from the new A/C compressor following the procedure in Step 1 above.

If the new FS-10 A/C compressor HAS NO oil, then the oil draining step will not be necessary.

4. Matching oil quantities:

If the amount of oil drained from the old A/C compressor (Step 2) is between 85 and 142 ml (3 and 5 oz.), pour the same amount of clean YN-12b refrigerant oil into the NEW A/C compressor.

If the amount of oil drained from the old A/C compressor (Step 2) is greater than 142 ml (5 oz.), pour 142 ml (5 oz.) of clean YN-12b refrigerant oil into the NEW A/C compressor.

If the amount of oil drained from the old A/C compressor (Step 2) is less than 85 ml (3 oz.), pour 85ml (3 oz.), of clean YN-12b refrigerant oil into the NEW A/C compressor.