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ToggleHow do you remove a pulley from an alternator?
How does alternator clutch pulley work?
An Overrunning Alternator Pulley (OAP) has a one-way clutch mechanism inside the hub that allows the belt to turn the alternator in one direction, but allows the alternator to free-wheel and spin at its own speed when the engine suddenly decelerates.
How do you install a pulley on an alternator?
What is a alternator decoupler pulley? – Related Questions
What size is alternator pulley nut?
Alternator Pulley Nut, Self-Locking Hex-Flange, 5/8-18, 0.69″ / 17.5mm Thick.
How tight should alternator pulley nut be?
Install the new pulley, lock washer, and nut by hand. 3. Tighten the nut with an impact wrench until the lock washer is completely closed and the nut is tight (about 70 ft-lbs).
Can you replace just the pulley on an alternator?
In many cases it is possible to remove and install the overrunning alternator pulley while the alternator is still on the engine. The plastic protective cap cannot be re-used after it has been removed from the pulley. A replacement cap is supplied with the new part.
Can I put a smaller pulley on my alternator?
Using a smaller pulley will speed the rotor up, and the alternator will produce more power. This won’t effect the ECM or anything else in the vehicle, since top voltage will still be regulated.
How do you diagnose a bad alternator pulley?
Rev up the engine to approximately 2000-2500 revolutions per minute (rpm). Then shut it off and listen for a buzzing sound coming from the alternator. If you hear a short buzzing sound (1 to 5 seconds), the pulley’s bearing may have worn out and the overrunning alternator pulley may require replacement.
How do you remove a decoupler pulley from an alternator?
How do I know if my alternator decoupler pulley is bad?
Look for signs of grease around the pulley indicating a bad seal. If you can get a view inside the alternator, the rotor should continue to spin down when you shut off the engine. If the charging system warning indicator is on, the OAD may be the culprit, not necessarily the alternator.
Should an alternator pulley spin freely?
If you are referring to a standard automotive alternator that is unplugged and does not have a belt coupling it with the rest of the engine, then quite freely. Freely enough, in fact, to continue spinning for a bit after being spun by hand.
What is an overrunning alternator pulley?
The overrunning alternator pulley is a further development of the fixed belt pulley on the alternator. Thanks to its overrunning clutch, it damps the vibrations which are generated by cyclic irregularities in the crankshaft and also enables the engine speed to be reduced rapidly in the event of sudden load changes.
What is the difference between an overrunning alternator pulley and an alternator decoupler pulley?
An OAP is a one-way clutch like a socket wrench that turns in one direction and locks when turned the other direction. An OAD operates in the same manner, but has a special clutch and spring that absorbs vibration to smooth out vibrations in the drive belt system.