What is the purpose of alternator overrunning 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.
Does alternator pulley have a bearing?
The overrunning alternator pulley consists of a pulley with an outside diameter suitable for using a poly-V belt, a one-way clutch unit with bearing supports, an inner ring and two seals.
What is the purpose of V pulley in charging system?
The function of the overrunning alternator pulley is to decouple the generator from the rotational irregularity of the crankshaft of an internal combustion engine. The large mass of the generator cannot follow the high irregularities of the crankshaft at engine start and drive resonances.
How do you change the pulley on an alternator?
PULLEY CHANGING INSTRUCTIONS 1. To remove the alternator pulley, with one hand use an impact wrench to loosen the nut, while holding the alternator fan with the other. It is recommended that protective gloves and eyewear be used. The pulley nut uses standard, right-hand threads, so to remove, rotate in a counter- clockwise direction.
What happens if I change the pulley size on my lternator?
Caution must be noted: Changing the pulley size on your a lternator may void the manufacturers warranty. Spinning your Alternator faster will increase brush and bearing wear.
How do you change the pulley on a Powermaster?
These alternators have a spacer installed between the nut and bearing to hold the rotor forward, preventing the internal parts from becoming misaligned and rubbing. When installing the pulley, this spacer should be removed and discarded. 2. Install the new pulley, lock washer, and nut by hand.
What kind of pulley do I need for Denso alternator?
Do not over tighten. NOTE: Typical pulleys are designed for a standard 17mm alternator shaft. Powermaster’s smaller Denso racing units have a 15mm shaft and require installation of the adapter bushing supplied with all racing style alternator pulleys.