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There is only 1 bolt on the clutch, it is highly unlikely it has loosen up.
The 3 that form the triangle are not serviceable bolts. #2 is drawn to #5 by #6. You need a clutch. I have attached the instructions, it is really a relatively simple but time consuming task. You can rent/borrow the tools from most parts stores like an Auto Zone. Print this on first viewing in case it times out. You will need help on the evac and recharge.
CLUTCH AND CLUTCH FIELD COIL
Installation NOTE: If installing a new A/C compressor, the A/C clutch components should be reused unless obvious signs of damage are found. If excessive grooving is found, a new A/C clutch disc and hub and A/C compressor pulley must be installed together. Otherwise, each component can be installed individually where needed.