A/C System Components (late R-12 system shown)

Separate suction & discharge hoses were used until ~'92. Mid-years (~'86-90) used square-drive shutoff valves at the compressor ports. Early models ('80~84) used an automatic shutoff valve & filter in the connection between the condenser & the condenser-to-evaporator hose. '94-96 R-134a systems use an all-Aluminum hard condenser-to-evaporator line, narrower spacing on the tubes of a slightly-smaller evaporator, and a parallel-flow condenser with rubber air flaps along each side of the grill. R-134a service ports use rubber balls (which are easily cut) instead of Schraeder valves; the conversion fittings are F3AZ-19E762-A & F3AZ-19E762-B.

The low pressure switch screws onto an automatic valve on the accumulator, and the threads are different for each refrigerant.

R-134a models have a hi-press. cutout switch on the discharge hose.

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Owner caption November 2009 · Photo 3026 of 5000