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Dayco HD Automatic Belt Tensioner - 74 mm Pulley x 57 mm Wide - 89440 38587 38609 DAY89440
Dayco HD Automatic Belt Tensioner - 74 mm Pulley x 57 mm Wide - 89440 38587 38609 DAY89440
Dayco

Dayco HD Automatic Belt Tensioner - 74 mm Pulley x 57 mm Wide - 89440 38587 38609 DAY89440

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SKU: DAY89440
$140.59
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Fitment

Fits these trucks

Freightliner, International, Kenworth, Mack, Peterbilt, Volvo, Western StarAutocar, Sterling 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

19 cross-refs
Dayco 89440 Gates 38587 Gates 38609 Caterpillar 236-2301 Caterpillar 2362301 Caterpillar 3223167 Caterpillar 3368955 Caterpillar 3524681 Cummins 2871292 Cummins 2871293 Cummins 3682946 Cummins 3683289 Cummins 3684428 Cummins 3691282 Cummins 3691283 Cummins 4299051 Cummins 4299052 IHC 1883020C2 IHC 1883020C3
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview

Keep the belt drive tight and quiet 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 worn tensioner tells on itself long before it strands you: the arm chatters, the pulley bearing turns noisy, and the belt squeals on every start-up โ€” and a belt that finally lets go leaves you sitting on the shoulder. 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.

Quiet, Correct Belt Tension: The Dayco HD Tensioner Advantage

This heavy-duty automatic belt tensioner (FleetPro part # DAY89440, Dayco 89440) runs a 74 mm pulley diameter with a 57 mm wide pulley face โ€” the surface the belt actually rides on, so pulley width and belt width have to match. The automatic arm takes up belt stretch on its own, which is what keeps tension correct between services instead of letting it drift off as the belt wears in. The complete unit weighs 5.55 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 89440, Gates 38587 and 38609, Caterpillar 236-2301, and Cummins 3682946. Put a fresh belt on 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, Freightliner, International, Kenworth, Mack, Monaco Coach, Peterbilt, Sterling, 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: 89440
  • Gates Interchange: 38587, 38609
  • Caterpillar Interchange: 236-2301, 2362301, 3223167, 3368955, 3524681
  • Cummins Interchange: 2871292, 2871293, 3682946, 3683289, 3684428, 3691282, 3691283, 4299051, 4299052
  • IHC Interchange: 1883020C2, 1883020C3
  • FleetPro Part #: DAY89440

Technical Specifications

  • Component Type: Heavy-Duty Automatic Belt Tensioner
  • Pulley Diameter: 74 mm
  • Pulley Width: 57 mm
  • Condition: New
  • Warranty: 1-Year FleetPro Warranty
  • Weight: 5.55 lbs
  • Package Dims: 8.07 x 4.47 x 4.22 in
  • Shipping: Parcel Friendly
  • UPC: 036687422132
  • 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, 57 mm Wide Face: The 57 mm pulley face is the surface the belt rides on, so pulley width and belt width need to match - check yours before you order.
  • 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.
  • Broad Interchange Coverage: Crosses to Gates 38587 and 38609, Caterpillar 236-2301, Cummins 3682946 and IHC 1883020C2, so one part number covers many trucks.
Specifications
Component Type
Heavy-Duty Automatic Belt Tensioner
Pulley Diameter
74 mm
Pulley Width
57 mm
Condition
New
Warranty
1-Year FleetPro Warranty
Weight
5.55 lbs
Package Dims
8.07 x 4.47 x 4.22 in
Shipping
Parcel Friendly
UPC
036687422132
Product Level
OE (Original Equipment)
Questions
Will this fit my truck?
This part fits Freightliner, International, Kenworth, Mack, Peterbilt, Volvo, Western Star, Autocar, Sterling 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 89440, Gates 38587, Gates 38609, Caterpillar 236-2301, Caterpillar 2362301, Caterpillar 3223167, Caterpillar 3368955, Caterpillar 3524681, Cummins 2871292, Cummins 2871293, Cummins 3682946, Cummins 3683289, Cummins 3684428, Cummins 3691282, Cummins 3691283, Cummins 4299051, Cummins 4299052, IHC 1883020C2, IHC 1883020C3.
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.