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Dayco AX21 Accessory Drive Belt - Alternator
| Brand | Dayco AX21 |
|---|---|
| Position | Alternator |
| Material | Synthetic rubber compound |
| Top Width | .531 |
| Top Width | 14 |
| Color | Black |
| Effective Length | 23.08 |
| Effective Length | 586.24 |
| Outside Circumference | 23.39 |
| Outside Circumference | 594.11 |
| Angle | 36 |
| Banded Belt | N |
| Belt Construction | Bottom cog |
| Fits | —20 vehicles |
Synthetic rubber compound. Provides durable flexibility for dependable accessory drive performance.
Bottom cog construction. Helps the belt run smoothly with improved flexibility.
Accessory drive belt. Transfers power to engine accessories through a reliable belt system.
Cross-references CARQUEST AX21, Continental-ContiTech AX21 and Gates AX21 for the same application. See all 7.
Dayco AX21 Accessory Drive Belt Overview
The Dayco AX21 accessory drive belt is a black, bottom-cog belt made from a synthetic rubber compound for accessory drive applications. With a 14 mm top width, 23.08 in effective length, and 23.39 in outside circumference, it is built to match the dimensional requirements used in many belt-driven systems.
Use the AX21 when replacing a worn accessory drive belt on vehicles and equipment that call for this size profile. This Dayco AX21 belt is also cross-referenced by CARQUEST AX21 and Gates AX21 for the same application.
Key Features
- Synthetic rubber compound construction for accessory drive service
- Bottom-cog design for flexibility in belt routing
- 14 mm top width for proper pulley contact
- 23.08 in effective length and 23.39 in outside circumference
- 36-degree angle specification
- Black finish
- Non-banded belt design
Detailed Product Description
The Dayco AX21 is an accessory drive belt engineered to meet the dimensional and construction requirements of belt-driven engine accessory systems. Its bottom-cog profile helps the belt conform around pulleys, while the synthetic rubber compound supports consistent operation in demanding underhood conditions. For buyers searching Dayco AX21, AX21 accessory drive belt, or replacement belt options for Kubota and Thermo-King applications, this part provides a direct size-based match where the OE specification calls for AX21 dimensions.
Because accessory drive belts are selected by size and profile, confirming the top width, effective length, outside circumference, and angle is essential before ordering. The AX21 is commonly searched alongside vehicle and equipment fitment terms such as Kubota AX21 belt replacement and Thermo-King AX21 drive belt replacement, especially when matching an existing belt number rather than a vehicle-specific catalog listing.
What This Belt Helps Address
- Cracked, glazed, or worn accessory drive belt surfaces
- Squealing caused by belt wear or loss of grip
- Accessory drive slippage under load
- Incorrect belt length after a previous replacement
- Noise or vibration from a deteriorated belt profile
Installation Notes and Tips
Verify the existing belt number, pulley routing, and measured dimensions before installation. Match the 14 mm top width, 23.08 in effective length, and 36-degree angle to the original specification, and inspect pulleys and tensioner components for wear before installing the new belt. For fitment-based searches, confirm the exact application on your Kubota or Thermo-King equipment, since this listing does not include expanded vehicle fitment data.
Quality Assurance
Dayco is a recognized supplier of accessory drive components, and the AX21 is built to the listed dimensional and material specifications for replacement use. No warranty information was provided in the product data.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2024 | Kubota | RTV520 Deluxe | — | — | Alternator | — |
| 2024 | Kubota | RTV520 General Purpose | — | — | Alternator | — |
| 2023 | Kubota | RTV520 Deluxe | — | — | Alternator | — |
| 2023 | Kubota | RTV520 General Purpose | — | — | Alternator | — |
| 2022 | Kubota | RTV520 | — | — | Alternator | — |
| 2021 | Kubota | RTV500 | — | — | Alternator | From Serial # 8W0001 |
| 2021 | Kubota | RTV520 | — | — | Alternator | — |
| 2020 | Kubota | RTV500 | — | — | Alternator | From Serial # 8W0001 |
| 2019 | Kubota | RTV500 4x4 | — | — | Alternator | From Serial # 8W0001 |
| 2018 | Kubota | RTV500 4x4 | — | — | Alternator | From Serial # 8W0001 |
| 2017 | Kubota | RTV500 4x4 | — | — | Alternator | From Serial # 8W0001 |
| 2016 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2015 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2014 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2013 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2012 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2011 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2010 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2009 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
| 2008 | Kubota | RTV500 4x4 | -L | -- | N/A | Mfg. From Serial No. 8W0001 |
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