BO PULLEY-13801 CCW 6GRV56 ZEN
17mm BORE, 56mm OD, 37mm W, 8mm DEEP, 16x1.5 CCW THREAD, 23mm BELT, 5.5mm TO FIRST GROOVE 6 GROOVE, CCW, CLUTCH PULLEY, ZEN
Features & Benefits
- Precision aftermarket replacement part
- Designed to match original fit, function, and performance
- Helps reduce belt vibration and accessory drive noise
- Supports smooth alternator operation during engine acceleration and deceleration
- Manufactured for dependable long-term operation
- Ideal for alternator rebuilding and repair
- Cross-referenced to OEM and aftermarket part numbers
What Does an Alternator Clutch Pulley Do?
An alternator clutch pulley, also known as an overrunning alternator pulley (OAP) or overrunning alternator decoupler (OAD), allows the alternator rotor to continue spinning independently during engine deceleration. This helps reduce belt vibration, minimizes stress on the serpentine belt drive system, and improves overall accessory drive performance.
A properly functioning clutch pulley helps reduce belt noise, improves belt tensioner stability, and protects the alternator and related drive components from excessive shock loads. Replacing a worn or seized clutch pulley is an important step in restoring proper belt system operation and extending the service life of the alternator.
Common Signs Replacement Is Needed
Replace the alternator clutch pulley if you notice:
- Chirping or squealing belt noise
- Excessive belt vibration
- Failing or bouncing belt tensioner
- Seized or locked pulley
- Free-spinning pulley in both directions
- Rough or noisy pulley bearing
- Premature serpentine belt wear
- Clutch pulley failure discovered during alternator rebuilding
Installation Recommendations
Installation should be performed by a qualified technician or experienced alternator rebuilder. Always use the correct clutch pulley removal and installation tools designed for your alternator application. Inspect the alternator shaft, threads, front bearing, belt tensioner, serpentine belt, and accessory drive components for signs of wear or damage before installation.
Verify the replacement pulley matches the original pulley design, rotation, thread specifications, and overall dimensions. After installation, ensure the pulley operates smoothly and verify proper belt alignment and tension before returning the alternator to service.
While You're Rebuilding
Inspect other common wear components to help maximize charging system reliability:
Why Buy From RC Auto Electric?
RC Auto Electric specializes in alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.
Disclaimer
Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original part, pulley style, thread specifications, dimensions, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.
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Frequently Asked Questions
How can I verify that W050-18 is the correct Clutch Pulley for my unit? +
Compare the complete W050-18 number, clutch pulley type, Bosch or unit-series reference, dimensions, connection or mounting layout, and product photos with the removed component. Ask RCAutoElectric before ordering if any detail differs.
Is Aftermarket Alternator Clutch Pulley W050-18 sold as an OEM or aftermarket component? +
The product title identifies this item as aftermarket. Use that stated designation together with part number W050-18; no additional manufacturer status should be assumed beyond the listing.
What should be inspected before installing part W050-18? +
Inspect the label, shipping condition, overall profile, terminals, holes, tabs, contact surfaces, and any stated measurements. Also examine related wear parts in the alternator assembly and follow the correct service manual.
Can professional rebuilders use this Clutch Pulley? +
Yes, Aftermarket Alternator Clutch Pulley W050-18 may be considered for professional rebuilding when every supplied identifier and verified specification matches the serviced unit. Proper installation, clearances, connections, and bench testing remain the technician’s responsibility.
Does part number W050-18 fit every Bosch vehicle or electrical unit? +
No universal fit is claimed. Different Bosch vehicles or equipment can use different alternator designs, even within the same model year. Confirm the original unit and component numbers rather than relying only on vehicle make or appearance.