How do you replace alternator belt 94 Volvo 940?

To replace the alternator belt on a 1994 Volvo 940, first, ensure the engine is off and cool. Loosen the tensioner by turning the adjustment bolt and then remove the old belt from the alternator and pulleys. Install the new belt by threading it around the pulleys according to the routing diagram, ensuring it sits properly in the grooves. Finally, adjust the tensioner to secure the belt in place and check for proper tension before starting the engine.