How do you unlock a tensioner pulley?
If equipped with a tensioner screw, back off the tensioner screw. Then, push the alternator toward the other pulleys, loosening the belt. To loosen an NAI tensioner, loosen the locking nut or bolt, then back off the tensioner screw. Push the pulley toward the other pulleys or accessories, loosening the belt.
How do you remove a pin from a tensioner?
Insert the ½” extension/breaker bar to rotate the smooth pulley tensioner arm counterclockwise to remove the bolt/pin. Slowly allow the arm to rotate clockwise to tension the accessory drive belt. Insert the ½” extension/breaker bar to rotate the grooved pulley tensioner arm counterclockwise to remove the bolt/pin.
When do you remove the lock on a tensioner pulley?
Remove the lock only after the tensioner, pulley, or slipper, and timing belt or timing chain are installed and aligned. The next time you work with a drive belt, timing belt, or timing chain, you’ll likely have to loosen a tensioner pulley to remove it.
What causes a tensioner pulley to jump up and down?
Another tell-tale sign is visible jumping of the serpentine belt tensioner pulley. The serpentine belt should rotate smoothly over the tensioner pulley. If the pulley is jumping up and down shows that the tension on the belt is changing with crankshaft pulsations we talked about earlier.
How do you loosen a tensioner on an alternator?
To loosen an AI tensioner, such as an alternator, loosen the main mounting bolt, usually on the engine, and the locking bolt, usually on a bracket or arm. If equipped with a tensioner screw, back off the tensioner screw. Then, push the alternator toward the other pulleys, loosening the belt.
When to replace serpentine belt tensioner — Ricks free?
A good belt tensioner will dampen the power pulses so much that the tensioner pulley arm barely moves. As the dampener wears the pulses cause the belt to flutter and that can be seen on the pulley arm. A belt tensioner pulley arm should not move more than 1/32”.