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Inspection [System Inspection] 1. Disconnect the vapor hose from the throttle body and connect a vacuum pump to the nipple on the throttle body. 2.
Oil Specification 1. The HFC-134a system requires synthetic (PAG) compressor oil whereas the R-12 system requires mineral compressor oil. The two oils must never be mixed. 2. Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the compressor model.
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