How do I know a part fits my truck?

Every listing shows the truck make, model years, side (left/right) and OEM cross-reference numbers. Match any of your OEM numbers to the listing, or send us your number and we will confirm fitment.

Do you ship the same day?

Orders placed before 12PM Central on business days ship the same day from our US warehouse. Transit is typically 2–5 business days depending on your state.

What is your return policy?

30-day returns on unused parts in original packaging. Wrong part shipped by us? We cover the return label and ship the correct one first.

Do you offer fleet or shop pricing?

Yes. Business accounts get tiered pricing, saved reorders and a dedicated line. Open a business account to see your pricing and order online.

Are these OEM or aftermarket parts?

We sell quality aftermarket parts cross-referenced to OEM numbers, plus select OEM-grade lines. Brand and grade are shown on every listing.

Can I order by part number?

Yes — type any part number or OEM cross reference into the search bar. If it is not listed, send it to us and we will source it.

Dayco HD Tensioner 89440, 74 mm Pulley x 57 mm Wide

Dayco HD Tensioner Pulley Diameter - 74 mm Pulley Width 57 mm

Application: Autocar, Freightliner, International, Kenworth, Mack, Monaco Coach, Peterbilt, Sterling, Volvo, Western Star
Brand: Dayco, OE
Cross: Dayco 89440 • Gates 38587 • Gates 38609

Brand
- Dayco
Quality Tier
- OE
OEM Reference
- Dayco 89440
Condition
- New
Warranty
- 1-Year FleetPro Warranty

Wholesale pricing for approved accounts

Open a FleetPro business account to see fleet pricing and order online. Repair shops, trucking companies & dealers welcome.

Request a business account

Terms and Conditions
30-day returns on unused parts
Same-day shipping on orders before 12PM CT

Internal Reference: DAY89440

Same-day shipping before 12PM CT from our Illinois warehouse
Part requests and quotes answered within one business hour
30-day returns
1-Year FleetPro Warranty
Wholesale and fleet pricing for approved business accounts
We speak English, Russian, Ukrainian, Romanian, Bulgarian, French and Polish

Belt tensioner, Details & Fitment

Heavy-duty automatic belt tensioner, 74 mm pulley diameter, 57 mm pulley width.

Specifications

Type: Belt tensioner
Applications: Autocar, Freightliner, International, Kenworth, Mack, Monaco Coach, Peterbilt, Sterling, Volvo, Western Star
Weight: 5.55 lbs
Pkg. Dims (in): 8.07 X 4.47 X 4.22
Shipping: Parcel Friendly
UPC Code: 036687422132

Where it's used

Maintains correct belt tension. Replace when the arm chatters, the pulley bearing is noisy, or the belt squeals on start-up.

Cross references: Dayco 89440 • Gates 38587 • Gates 38609 • 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

Product Details

Brand	Dayco
Quality Tier	OE
OEM Reference	Dayco 89440
Condition	New
Warranty	1-Year FleetPro Warranty