Overrunning Alternator Pulley - Quinton Hazell - QTR111
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Product Information
Full details
This Overrunning Alternator Pulley (OAP) from Quinton Hazell (part number QTR111) is designed for vehicle owners and mechanics seeking a reliable replacement component. Its key benefit is ensuring smooth alternator operation and protecting the belt drive system from torsional vibrations. A potential caveat is the need for specific vehicle compatibility checks before purchase. This pulley features a 7-groove design, a width of 35.5 mm, an outer diameter of 53 mm, and an inner diameter of 17 mm. It functions as an Alternator Freewheel Clutch (AFK) system.
All features
| Model Part Number | QTR111 |
|---|---|
| Brand | Quinton Hazell |
Extended Product Information
FAQs
What is an Overrunning Alternator Pulley?
An Overrunning Alternator Pulley (OAP), also known as an Alternator Freewheel Clutch (AFK), allows the alternator to spin freely when the engine decelerates. This prevents the alternator's inertia from driving the belt forcefully, reducing stress and vibration on the entire accessory drive system.
How do I know if my vehicle needs a new OAP?
Symptoms can include a worn or frayed serpentine belt, excessive vibration from the belt, unusual noises (like rattling or whining) from the front of the engine, or a battery warning light that flickers or stays on intermittently.
What vehicles is the Quinton Hazell QTR111 compatible with?
The QTR111 is specified for certain Dacia and Renault models, including the Dacia Dokker Box Body/MPV 1.2 TCe 115 (FEAY) from 07/2015 to 12/2021. It also cross-references with several popular aftermarket and OEM part numbers (see compatibility section).
Can I install the QTR111 myself?
While possible for experienced DIY mechanics, installation requires specific tools and knowledge of serpentine belt systems and torque specifications. Professional installation is recommended to avoid damage and ensure proper function.
What is the difference between an OAP and a standard alternator pulley?
A standard pulley is rigidly fixed to the alternator shaft. An OAP contains an internal clutch that allows the alternator to freewheel when engine speed drops rapidly, decoupling its rotational inertia from the drive belt.
How long should the QTR111 pulley last?
With proper installation and in typical driving conditions, an Overrunning Alternator Pulley should last for many years or tens of thousands of miles. However, longevity can be affected by driving habits, environmental conditions, and the overall health of the accessory drive system.
Troubleshooting
New pulley is making noise (whining or grinding)
Verify that the correct pulley was installed and that it is compatible with your vehicle. Ensure the pulley was torqued to specification. Check the belt tensioner and the condition of the serpentine belt for any signs of wear or damage. If the noise persists, the pulley may be defective or incorrectly installed.
Serpentine belt is showing premature wear or is loose
Confirm the OAP has the correct number of grooves for your belt. Check the serpentine belt tensioner for proper operation; a weak tensioner can cause belt slippage and wear. Ensure the pulley is correctly seated and torqued. Inspect all other accessory pulleys for proper alignment and bearing function.
Alternator is not charging the battery
While the pulley itself may not directly cause a charging issue, a malfunctioning pulley or belt can indirectly affect alternator performance. Check the electrical connections to the alternator. Ensure the serpentine belt is properly tensioned and driving the alternator pulley effectively. If these are fine, the issue likely lies with the alternator itself or its voltage regulator.
Pros and Cons
Pros
- Enhances serpentine belt longevity by absorbing torsional forces.
- Reduces strain on the alternator and accessory drive components.
- Provides a smoother engine running experience by minimizing vibrations.
- High-quality materials ensure durability and a long service life.
- Direct fit for specified Dacia and Renault models.
Cons
- Requires professional installation due to its specialized nature.
- Compatibility must be verified against specific vehicle VIN before purchase.
- Specific tools may be required for proper installation.
- Potential for noise if not installed correctly or if other belt components are worn.
Setup, Compatibility & Care
Compatibility Verification:
Before installation, always confirm that the Quinton Hazell QTR111 is compatible with your specific vehicle's make, model, year, and engine. Cross-reference the part number (QTR111) with your vehicle's service manual or consult a professional mechanic. Key cross-references include BOSCH F 00M 991 216, DAYCO ALP2346, ALP2371, GATES OAP7110, VALEO 588040, and OEM numbers DACIA 7701062985, RENAULT 7701062985, 7701477508.
Installation:
Installation of an Overrunning Alternator Pulley typically requires specialized tools, such as a specific pulley removal and installation tool kit, and a torque wrench. The process involves removing the serpentine belt, unbolting the old pulley, installing the new QTR111 pulley, and then reinstalling the belt. It is highly recommended that this procedure be performed by a qualified mechanic to ensure correct tension and alignment, preventing damage to the alternator or other components.
Care and Maintenance:
This component is largely maintenance-free once installed. However, regular inspection of the serpentine belt for cracks, fraying, or glazing is crucial. Listen for any unusual noises (whining, grinding, or rattling) coming from the alternator area, which could indicate a failing pulley bearing or an improperly installed unit. Ensure the belt tensioner is functioning correctly as part of routine maintenance.