If your talking about taking tension off the belt to replace said belt put a wrench on the large nut in center of pulley and turn counter clockwise to pull tenioner pulley off belt.
Loosen the tensioner pulley. Put the belt around the alternator pulley and the tensioner pulley. Move the tensioner pulley to the right until the belt is tight. Tighten the tensioner pulley.
Loosen the tensioner pulley. When the tensioner pulley is loose the belt will come off. Put the new belt on and tighten the tensioner pulley.
Loosen the tensioner pulley. The tensioner pulley will slide to the right. This will loosen the alternator belt. So it can be removed.
The easiest way to loosen the tensioner is to use an automatic belt tensioner. This can be used on a serpentine belt which is connected to every pulley on the engine.belt.
Pry bar.
You will need to loosen the tensioner pulley. When the tensioner pulley is loose the air conditioning compressor belt will become loose. Put the new belt on and tighten the tensioner pulley.
The 1989 Toyota Corolla serpentine belt can be tightened or loosen with the tensioner pulley. Pry to the left on the tensioner pulley until the belt is tight. Tighten the tensioner pulley.
You will need to loosen the tensioner pulley. Put the alternator belt on. Push the tensioner pulley to the left until the alternator belt is tight. Tighten down the tensioner pulley.
Loosen the tensioner pulley on your 1988 Chevrolet Corsica. When the tensioner pulley is loose the serpentine belt will easily come off. Put the new serpentine belt on and tighten the tensioner pulley.
You will need to loosen the alternator belt with the tensioner pulley. When the tensioner pulley is loose the alternator belt will become loose. Put the new alternator belt on and tighten the tensioner pulley.
Loosen the tensioner pulley. Put the fan belt around the pulleys. Pry the tensioner pulley to the right until the belt is tight. Tighten the tensioner pulley nut.
Replace the tensioner assembly as one piece.