Dayco HD Automatic Belt Tensioner - 74 mm Pulley x 38.3 mm Wide - 89448 38610 2891940 DAY89448
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$160.15
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Fitment
Fits these trucks
Freightliner, International, Kenworth, Mack, Peterbilt, Volvo, Western StarAutocar, Blue Bird and Monaco Coach applicationsEngine belt drive - maintains correct belt tensionReplace when the arm chatters or the belt squeals on start-up
Always confirm your year, make & model before ordering.
Part numbers
OEM & interchange numbers
6 cross-refsDayco 89448 Gates 38610 Cummins 2891940 Cummins 3104149 Cummins 3682683 Cummins 3690067
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview
Put the squeal and the chatter behind you with this Dayco Heavy-Duty Automatic Belt Tensioner distributed by FleetPro Parts & Tires. Dayco supplies this tensioner at the original-equipment level, so the pulley size and the tension it holds are what the belt drive was built around. A tensioner on its way out is easy to hear and expensive to ignore: the arm chatters, the pulley bearing turns noisy, and the belt squeals on start-up until the day it lets go and leaves the truck sitting. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.
Steady Belt Tension: The Dayco HD 89448 Tensioner Advantage
This heavy-duty automatic belt tensioner (FleetPro part # DAY89448, Dayco 89448) pairs a 74 mm pulley diameter with a narrower 38.3 mm wide pulley face, so check the width of the belt you are running before you order โ pulley width and belt width have to match. The automatic arm takes up belt stretch on its own, which keeps tension correct between services instead of letting it fall off as the belt wears in. The unit weighs 3.45 lbs, ships parcel friendly in an 8.07 x 4.47 x 4.22 in carton, and goes on as a new part backed by a 1-Year FleetPro Warranty.
At FleetPro Parts & Tires, we know a belt job is only finished when the tensioner goes on with it. This Dayco unit is a direct replacement for highly searched industry numbers including Dayco 89448, Gates 38610, and Cummins 2891940 and 3690067. Fit a fresh belt at the same time โ a new belt riding a worn tensioner will not stay tight for long.
Vehicle Fitment & Compatibility
This Dayco belt tensioner is intended for the following commercial applications:
- Make/Model: Autocar, Blue Bird, Freightliner, Kenworth, Mack, Monaco Coach, International, Peterbilt, Volvo and Western Star
- Component Group: Engine / Belts & Tensioners
- Function: Maintains correct belt tension
- Replace When: The arm chatters, the pulley bearing is noisy, or the belt squeals on start-up
Direct Replacement & Cross-Reference Numbers:
This Dayco belt tensioner serves as a direct replacement for the following part numbers:
- Dayco Interchange: 89448
- Gates Interchange: 38610
- Cummins Interchange: 2891940, 3104149, 3682683, 3690067
- FleetPro Part #: DAY89448
Technical Specifications
- Component Type: Heavy-Duty Automatic Belt Tensioner
- Pulley Diameter: 74 mm
- Pulley Width: 38.3 mm
- Condition: New
- Warranty: 1-Year FleetPro Warranty
- Weight: 3.45 lbs
- Package Dims: 8.07 x 4.47 x 4.22 in
- Shipping: Parcel Friendly
- UPC: 036687450883
- Product Level: OE (Original Equipment)
- Brand: Dayco (Distributed by FleetPro Parts & Tires)
Key features
- Original Equipment Supplier Part: Dayco supplies this tensioner at the OE level, so the pulley size and the tension it holds match what the belt drive was designed around.
- 74 mm Pulley, 38.3 mm Wide Face: The 38.3 mm pulley face is the dimension to check against the belt you are running, since pulley width and belt width have to match.
- Automatic Tension Take-Up: The arm takes up belt stretch on its own, keeping tension correct between services with no manual adjustment.
- Ends the Chatter and Squeal: Replaces the worn unit behind a chattering arm, a noisy pulley bearing, or a belt that squeals on start-up.
- Light Enough to Ship Parcel: At 3.45 lbs this is a parcel-friendly part that leaves our Illinois warehouse fast instead of waiting on a freight pickup.
Specifications
Component Type
Heavy-Duty Automatic Belt Tensioner
Pulley Diameter
74 mm
Pulley Width
38.3 mm
Condition
New
Warranty
1-Year FleetPro Warranty
Weight
3.45 lbs
Package Dims
8.07 x 4.47 x 4.22 in
Shipping
Parcel Friendly
UPC
036687450883
Product Level
OE (Original Equipment)
Questions
Will this fit my truck?
This part fits Freightliner, International, Kenworth, Mack, Peterbilt, Volvo, Western Star, Autocar, Blue Bird and Monaco Coach applications, Engine belt drive - maintains correct belt tension, Replace when the arm chatters or the belt squeals on start-up. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Dayco 89448, Gates 38610, Cummins 2891940, Cummins 3104149, Cummins 3682683, Cummins 3690067.
How fast does it ship?
In-stock orders placed before 12 PM Central on business days ship the same day from our Hanover Park, IL warehouse, and typically arrive in 2 to 5 business days anywhere in the USA.
What's your return policy?
Unused items in original packaging can be returned within 30 days, backed by our 30-day money-back guarantee. If we ship the wrong part, we cover the return label and send the correct one.