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  2. sku: 8066600041587721
  3. DAYCO 89447

DAYCO 89447 Cascadia Automatic Belt Tensioner Slack 036687422347

fits make: Freightliner. year: 2018–2019.

89447 Dayco For Freightliner Cascadia 18-19 Automatic Belt Tensioner Assembly No Slack Heavy

( Brand: Dayco ), ( Manufacturer Part Number: 89447 ), ( Part Type: Belt ), ( Product Type: Engine ), ( UPC: 036687422347 ), ( Fitment Type: Direct Replacement ), ( Partslink Number: 4920105, 2871294, 4299053 ), ( Compatible Make S : Freightliner, Peterbilt, Kenworth, Autocar Llc., Western Star ), ( Compatible Model S : Cascadia, Columbia, Coronado, 114sd, Century Class, Classic ), ( Fitnote: Location ), ( Location: Fan And Alternator, .canada Built ), ( Product Subtype: Engine Pulleys ), ( Series: No Slack ), ( Product Details: Drive Belt Tensioner ), ( Department: Replacement )

Review DAYCO For Freightliner Cascadia Automatic Belt Tensioner Assembly No Slack Heavy fits 2018–2019

Introducing the Dayco 89447 Automatic Belt Tensioner Slack Kit for Freightliner Cascadia 18-19 models - a reliable and efficient solution designed to keep your vehicle's belts functioning at their best. This essential component of your engine's drive system ensures that the belts maintain the correct tension, resulting in improved performance and longevity.

The Dayco 89447 kit is specifically engineered for Freightliner Cascadia 18-19 automatic belt tensioner systems. Each part is meticulously manufactured to meet or exceed original equipment specifications for a perfect fit and seamless integration into your vehicle.

The heart of this kit is the automatic belt tensioner. This component uses a variable pulley system to automatically adjust belt tension based on engine speed and load. By maintaining optimal belt tension, it reduces wear on the belts and helps prevent damage to other engine components, ultimately extending the life of your engine.

The Dayco 89447 kit also includes the necessary tensioner slack components. These parts are responsible for controlling the amount of slack in the belts, which is crucial for proper belt movement and function. A correctly adjusted slack allows the belts to move smoothly while also ensuring they are under sufficient tension to effectively power the engine's accessories.

Each part in this Dayco kit is made from high-quality materials, ensuring durability and long-lasting performance. The tensioner components are engineered from robust steel, while the belt material is reinforced for added strength and resistance to wear.

Installing the Dayco 89447 kit is a straightforward process, making it an ideal choice for both professional mechanics and DIY enthusiasts. The kit comes with clear and easy-to-follow installation instructions, helping to minimize the time and effort required for installation.

In summary, the Dayco 89447 Automatic Belt Tensioner Slack Kit for Freightliner Cascadia 18-19 models is a must-have component for maintaining the optimal performance and longevity of your vehicle's engine system. By providing a perfect fit, robust construction, and hassle-free installation, this kit offers peace of mind and the confidence that your belts will continue to function effectively, mile after mile.

Pros and Cons of Buying Dayco 89447 for Freightliner Cascadia 18-19 Automatic Belt Tensioner Slack

1. Pros:

a. OEM (Original Equipment Manufacturer) Replacement: Dayco 89447 is a genuine Freightliner part, ensuring proper fit, function, and compatibility with your Cascadia.

b. Enhanced Performance: This part is engineered to provide improved belt tensioning, which can lead to better engine performance and longer belt life.

c. Reduced Maintenance: A well-functioning belt tensioner can help reduce the frequency of serpentine belt replacements, saving you time and money in the long run.

d. Warranty Coverage: Freightliner and Dayco back this part with a warranty, providing peace of mind and protection against manufacturing defects.

2. Cons:

a. Cost: As a genuine OEM part, the Dayco 89447 may be more expensive than aftermarket alternatives.

b. Availability: Depending on your location and Freightliner dealer availability, you may experience longer waiting times for this part.

c. Installation Complexity: Installing this part may require specialized tools and knowledge, potentially adding to the total cost of the repair.

Conclusion:

The Dayco 89447 for Freightliner Cascadia 18-19 Automatic Belt Tensioner Slack offers several advantages, including improved performance, reduced maintenance, and peace of mind through OEM warranty coverage. However, its higher cost and potential installation complexity are important considerations. Ultimately, the decision to purchase this part depends on your priorities, budget, and the availability of alternative solutions.

Recommendation:

If you value the assurance of OEM quality, the convenience of warranty coverage, and the potential long-term savings from enhanced belt tensioning, the Dayco 89447 may be the best choice for you. However, if cost is a significant concern, you may want to explore aftermarket alternatives or consider refurbished OEM parts. Always ensure that any alternative parts you consider are compatible with your Freightliner Cascadia and meet your performance expectations.

Details:

Thermoplastic rubber spring slot plug that helps keep out harmful contaminants. Pulley 1 Diameter: 74mm. With our drive belt parts you can schedule the repair when its convenient for. You won't have those concerns with our replacement drive belt parts.

Features: Heavy duty cast aluminum spring case that resists cracking and fatigue. Do you recognize the name on box. And how do you know if you re getting the best price. Direction: Counter Clock Wise.

Type: Automatic. Rubber O ring which seals against dust and grime. Number Of Pulleys: Serpentine belt drives consist of a single that powers most, if not all, the engines accessories.

A PTFE strip wound within the spring resists abrasion and flat is coated to resist rust. This innovative design reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed and lessens noise slippage, or poor performance caused by low after begins stretch wear. Specifications: Belt Type: Serpentine. Pulley 1 Flat: Y.

No traffic, no standing in line, order from the comfort of your home or office. Lubricated nylon pivot tube bushing and spring for quieter performance. No Slack Heavy Duty Automatic Belt Tensioner Assembly 89447 by Dayco.

part #: 89447 prices

  • $35.00-$155.00

specifications pulleyhop:

  • for makes: Freightliner
  • for years: 2018-2019
  • brand: Dayco
  • mpn: 89447
  • part type: Belt
  • product type: Engine
  • upc: 036687422347
  • fitment type: Direct Replacement
  • partslink number: 4920105, 2871294, 4299053
  • compatible make s : Freightliner, Peterbilt, Kenworth, Autocar Llc., Western Star
  • compatible model s : Cascadia, Columbia, Coronado, 114sd, Century Class, Classic
  • fitnote: Location
  • location: Fan And Alternator, .canada Built
  • product subtype: Engine Pulleys
  • series: No Slack
  • product details: Drive Belt Tensioner
  • department: Replacement

offer pulleyhop:

  • started: April 1, 2026
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • quantity: 5

returns pulleyhop:

  • paid by: Seller
  • time: 30 Days
  • policy: Returns Accepted

seller pulleyhop:

  • # reviews: 4299
  • rating: 100.0%
  • city: Rockville Centre, New York

shipping pulleyhop:

  • carrier: FedEx
  • transit: 2-6 Days
  • class: Standard
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
  • type: Fixed

general pulleyhop:

  • condition: New
  • Car Truck Parts Accessories > Accessory Belts > Pulleys

payments pulleyhop:

  • other
  • wallet: Apple-pay
  • credit card: Mastercard
for makes: freightliner, for years: 2018-2019, part type: belt, product type: engine, fitment type: direct replacement, partslink number: 4920105, 2871294, 4299053, compatible make s: freightliner, peterbilt, kenworth, autocar llc., western star, compatible model s: cascadia, columbia, coronado, 114sd, century class, classic, fitnote: location, location: fan and alternator, .canada built, product subtype: engine pulleys, series: no slack, product details: drive belt tensioner, department: replacement,
category: auto parts > car truck parts accessories > accessory belts > pulleys, sku: 8066600041587721,

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5 offers $35.00–$155.00 USD
  • Offer #1: $155.00 price + $13.81 shipping estimate = $168.81* total.+$13.81 shipping
  • Offer #2: $110.00 price + $27.12 shipping estimate = $137.12* total. Dayco mack semi Belt Tensioner.+$27.12 shipping
  • Offer #3: $35.00 price + $10.00 shipping estimate = $45.00* total. Designed for optimal performance, this tensioner assembly is a crucial component for ensuring the proper functioning of your vehicle's accessory drive belt The Dayco Accessory Drive Belt Tensioner Assembly is a high-quality car part made in the United States.+$10.00 shipping
  • Offer #4: $100.00 price + $6.80 shipping estimate = $106.80* total. Don't let a faulty tensioner assembly cause issues with your vehicle's accessory belt system This accessory drive belt tensioner assembly is a high-quality replacement part for your vehicle.+$6.80 shipping
  • Offer #5: $124.13 price + $0.00 shipping estimate = $124.13* total. The OE/OEM Part Number for this product is 2002279 and 3477963, and the Manufacturer Part Number is This is a high-quality Accessory Drive Belt Tensioner Assembly from Dayco, perfect for your diesel engine needs.FREE SHIPPING

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