Volvo Repair: Enginge belts, volvo 240 dl, crank pulley

Question
How do i replace the enginge belts on a 1984 volvo 240 DL non turbo 2.3L
The belt the runs from the engine block to the airconditioning unit, how do I loosen it to remove it, cant find how.

Answer
the crank pulley is a 2 piece pulley look into the front of the pulley there are 4 10 mm nuts and 2 10mm bolts remove them and then the belt will loosen then you will need to add a shimm or 2 from the outside then put the bolts back in.then tighten them slightly and then turn the crankshaft alittle then tighten more then turn it do this until they are tight all the way down.