Page 1132 - Workshop Manual - Aumark (BJ1051)

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Heater and AC-Refrigerant oil

Refrigerant oil

Inspection

1. Antitheses: take standard refrigerant oil and put it into test tube as standard oil, then
take the refrigerant oil to be checked and put it into test tube with same size for
comparison; if the color of checked oil is buff or orange, which means the oil is ok; if
the color changed to henna cloudy liquid, which means it can not be used any more.
2. Paper dripping method: take one drop from the refrigerant oil to be checked and drip
it onto a piece of clean and white paper; after a while, observe its color, if the color is
shallow and the oil is distributed evenly it means it can be used; if there are black
specks in the middle of oil drop, it means the oil had degenerated and it can not be
used.

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