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ToggleCan 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.
How do you remove a decoupler pulley from an alternator?
How do you change a clutch pulley on a alternator?
How do you take an alternator pulley off? – Related Questions
Are alternator pulleys pressed on?
There are two main types of alternator pulleys, which are either pressed on or secured by a nut and a lock washer. To remove a pressed-on pulley, a puller set is required. The tool needed for most other alternator pulley removal is a pneumatic or electric air gun.
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.
Why do some alternators have a clutch pulley?
Clutch pulleys, also known as one-way or decoupler pulleys, are designed to decouple the Alternator from the rotational forces of the engine crankshaft pulley and serpentine belt.
How does a freewheel alternator pulley work?
A Freewheel pulley is the mechanical link between the alternator and the engine output crankshaft pulley. The pulley drives the alternator which allows the battery to be recharged. The Overrunning Alternator Pulley (OAP), also called the freewheel pulley, is a spare part of the complete alternator.
What is a alternator decoupler pulley?
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 does pulley size affect speed?
Pulleys of Different or Same Size
If a smaller pulley turns a larger one, the larger one will turn slower, but with more power available at the shaft. If a bigger pulley turns a smaller one, the smaller one will turn much faster than the bigger one but with less power available at the shaft.
Does idler pulley size matter?
#2 An idler pulley is generally spring loaded in engine applications. The size of the pulley doesn’t matter, because the belt doesn’t wrap around the idler, the idler just pushes on the belt between two pulleys to tension the belt.
What is the pulley ratio in an alternator?
The first step is to understand how the pulley ratio affects the alternator. Typical original-equipment ratios are around 3 to 1, which simply means the crank pulley is three times the diameter of the alternator’s pulley. Ratios less than 3 to 1 are typically looked at as being underdriven.
At what RPM does an alternator start charging?
Alternator may not generate sufficient charging voltage until alternator speed is greater than about 2000 RPM. Typically, alternators have their full output rated at 6000 RPM but can continue to spin up to 12,000 RPM or more without any additional increase in output.
Can high rpm damage alternator?
TOO HIGH OF RPM WILL DAMAGE ANYTHING. INCLUDING ALTERNATORS. YOU IMPORTANTLY MUST BE AWARE THAT IF THE ALTERNATOR IS BELT DRIVEN, THE DIFFERENCE IN SIZE OF THE TWO BELT PULLEYS MIGHT HAVE THE ALTERNATOR TURNING FASTER THAN THE ENGINE RPM, MAYBE MANY TIMES FASTER.