Description
febi bilstein 30816 Alternator Overrun Pulley with Coupling – for Alternator and Air Conditioning Compressor – pack of one
About this item
- Original febi bilstein spare part – Solutions „Made in Germany”
- Please use the vehicle identification at the top of the page to confirm compatibility with your vehicle. All restrictions must be observed!
- Weight: 0,69 kg
- OE numbers (for comparison purposes only): VW 070 903 201 E S1; OEM numbers (for comparison purposes only): GATES K01EG1, SKF VKMAF 31101
- among others suitable for: VW: Phaeton 4motion (3D), Touareg 4motion (7L), Transporter T5 (7H), Transporter T5 (7J), Transporter T5 4motion (7H), Transporter T5 4motion (7J)
From the manufacturer
febi bilstein: Alternator Overrun Pulley
Combustion engines do not have a uniform rotary motion. Due to the four-stroke principle, the crankshaft is constantly accelerated and braked. These vibrations are also transmitted to the power unit drive and generate high torque fluctuations, especially on the relatively heavy generator rotor.
In modern vehicles, the generator is equipped with an alternator overrun pulley. It is mounted directly on the drive shaft of the generator and transmits the driving force only in one direction of rotation. This decouples the generator from the vibrations of the crankshaft. The advantage: the belt drive runs smoother and quieter and the service life of the drive belt is extended. For this reason, febi only offers alternator overrun pulleys in OE matching quality.
febi – Your No.1 in the Independent Aftermarket
- Tested OE matching quality
- Manufacturing competence since 1844
- Your No. 1 for professional vehicle repairs
The benefits at a glance
Robust construction for perfect function
Optimal fitting accuracy for easier repairs
Strict quality standards
Compliance with the requirements of vehicle manufacturers
Quality by Conviction
If the alternator overrun pulley is stuck, engine vibrations are no longer compensated and lead to unsteady belt running at low engine speeds. Due to the increased movements of the belt, high forces act on the tensioning element which can cause both this and the fixed alternator overrun pulley to fail prematurely. In the worst case scenario, this can result in serious engine damage.
Alternator overrun pulleys from febi are therefore intensively tested. Our quality management tests the offered components for various requirements and loads, e.g. accuracy of fit, dimensional accuracy, material quality, and tensile strength.
Characteristics of Various Freewheels
Currently two different freewheels are used: the Overrunning Alternator Pulley (OAP) and the Overrunning Alternator Decoupler (OAD).
The OAP has a simple, overrunning clutch located inside the running disc. When the engine is switched off, the generator rotor runs out due to the large mass without taking the pulley with it.
In contrast, the OAD has a torsion spring in addition to the freewheel function where energy can be absorbed. It absorbs rotational irregularities emanating from the crankshaft before these can have a negative influence on the generator and therefore also on the auxiliary drive.
Safety Information:
These products are designed to be used as originally intended and not modified for purpose. Please ensure the products are installed by a competent individual. N.B. products are usually supplied without fitting instructions.