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I replaced my clutch assembly with a re-manufactured one I found on eBay. There is a snap-ring, and then I used a puller to get it started to slide off the compressor. It's not a press fit, but it gets stuck after 8 years. Replacing the compressor requires more cost, and recommended replacement of the drier, along with vacuuming the system and re-filling. Expensive if you don't have the equipment.
Also, here is info from the Saab repair manual on compressor engagement, just to be sure you've checked everything:
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A/C request:
A number of conditions must be fulfilled in order for the A/C relay to be grounded and for the A/C compressor clutch to begin to draw power.
For control panel with A/C, the function is activated manually. In order for an A/C request to be completed, the fan must be in position 1-4 and the A/C button in the ON position.
For ACC, the A/C request is automatic when the ACC-panel is ON (that is, OFF is not pushed in), ECON is not selected, the engine is running and the outside temperature exceeds +1°C.
The engine management system compensates the engine for the extra load of the compressor.
A/C engagement:
A/C request comes from the control panel with A/C or ACC. For control panel with A/C, the signal arrives on a direct lead, and for ACC the information goes on the bus to DICE.
The pressure in the condenser must be lower than 27 bar and higher than 2 bar . The pressure sensor senses the pressure in the condenser and sends the information to DICE.
The temperature in the evaporator must exceed +4°C . DICE receives the information from the anti-freeze sensor.
The engine temperature must be lower than +126°C (petroleum engine) and +118°C (diesel) engine. DICE receives the information from respective engine management system on the bus via MIU.
The conditions for A/C request are fulfilled and the engine management system grounds the A/C relay. When the relay is grounded, power is supplied via the compressor temperature monitor. If the temperature monitor has been activated, it is reset automatically.
IMPORTANT : If a trouble code is generated for any of the sensors for above values, the conditions for engagement of the A/C are not fulfilled.
posted by 167.6.247...
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