Cascadia Belt Tensioner Assembly DD15 - DD13 2008-2026 - A4722001570 89498

• Detroit Diesel Specific Fit: Precision-engineered as a direct 1-to-1 replacement for the 12.8L Detroit Diesel DD13 and DD15 engines found in 2008-2026 Freightliner Cascadia trucks.
• Heavy-Duty Steel Construction: Forged from high-strength industrial steel rather than prone-to-cracking aluminum, ensuring maximum durability against harsh engine vibrations and high torque loads.
• Optimized Serpentine Tension: Features a pre-loaded, high-tension internal spring that eliminates belt slip, squealing, and premature wear on your water pump and alternator bearings.
• 10-Groove Precision Pulley: Includes a premium 2.95-inch smooth/grooved combo pulley equipped with a high-temp sealed bearing for quiet, frictionless accessory drive operation.
• Massive Cross-Reference Compatibility: Completely replaces failure-prone factory units and top aftermarket alternatives, including A4722001570, Dayco 89498, and Gates 38667.

Restore reliable power delivery to your engine's accessories with this premium Cascadia Belt Tensioner Assembly DD15 by FleetPro Parts & Tires. Specifically engineered for 2008–2026 Freightliner Cascadia models equipped with the 12.8L Detroit Diesel DD13 and DD15 engines, this heavy-duty tensioner ensures your serpentine belt maintains perfect alignment and tension. A failing tensioner can lead to belt squeal, loss of alternator charge, water pump failure, and ultimately, an unexpected breakdown. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets and owner-operators nationwide.

Eliminate Belt Squeal: The Cascadia Belt Tensioner Assembly DD15 Advantage

This Cascadia Belt Tensioner Assembly DD15 is overbuilt to survive the relentless vibrations and high under-hood temperatures of long-haul trucking. Constructed from industrial-grade steel rather than cheap aluminum, it houses a high-tension internal spring designed to absorb shock loads from the AC compressor and alternator. The 2.95-inch diameter pulley features a precision-machined 10-groove design, allowing for smooth, vibration-free serpentine belt routing that extends the life of all your front-end accessory drive (FEAD) components.

As we continue to build the largest inventory of commercial truck parts in Illinois, we prioritize engine hardware that balances industrial strength with ease of installation. Serving as a direct exact-fit replacement for dozens of OEM and aftermarket numbers—including Detroit Diesel A4722001570, Dayco 89498, and Gates 38667—this complete assembly is ready to bolt right on. Upgrade your accessory drive today with a high-performance tensioner built for the long haul.

Vehicle Fitment & Compatibility

This heavy-duty steel belt tensioner is precision-engineered for the following commercial applications:

• Make: Freightliner
• Model: Cascadia
• Engine Manufacturer: Detroit Diesel
• Engine Models: 12.8L DD13 & DD15
• Years: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026

Direct Replacement & Cross-Reference Numbers:

This serpentine belt tensioner serves as a direct exact-fit replacement for the following part numbers:

• Freightliner / Detroit Diesel OEM: A4722000170, A4722000270, A4722000570, A4722001070, A4722001370, A4722001570, A4722001670, EA4722000470, EA4722001070
• DDE / DET OEM Variations: DDE 4722001070, DDE A4722001370, DDE A4722001570, DDE A4722001670, DDE EA4722000970, DDE EA4722001070, DDEA4722001570, DET A4722001570, DET EA4722001070
• Dayco: 89498, 89498DAY, 2428-89498
• Gates: 38667
• Continental: 49603
• Automann: 814.89498, 819.46070
• Other Aftermarket: FRT-A4722001370 / FRTA4722001370 (Newstar), GA38667, GT 38667, GY49603, S-27125 / S27125 (Newstar), SK38667 (SKP), TF/DDEEA4722001070, TFDDEEA4722001070

Technical Specifications

• Belt Type: Serpentine
• Material: Heavy-Duty Steel
• Outside Pulley Diameter: 2.95"
• Pulley Groove Quantity: 10 Grooves
• Pulley Type: Smooth / Grooved Combo
• Brand: FleetPro Parts & Tires