We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89439, Heavy Duty - Vehicle Self-Adjusting Belt Tensioners
DAYCOVehicle Self-Adjusting Belt Tensioners

DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89439, Heavy Duty

The DAYCO Self-Adjusting Belt Tensioner (SKU 4HMD9, part number 89439) is a heavy-duty vehicle component with one pulley. 3G Electric interprets customer demand and delivers this genuine DAYCO tensioner across 14…

SKU 3G-OTH-486445

Brand
DAYCO
Item
Belt Tensioner: Self-Adjusting Belt Tensioner, 89439, Heavy Duty
Category
Vehicle Self-Adjusting Belt Tensioners
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

DAYCO
Manufacturer Part Number
89439
Type
89439, Heavy Duty
Pulleys
1
Performance Rating
Heavy Duty
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

DAYCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DAYCO Self-Adjusting Belt Tensioner (SKU 4HMD9, part number 89439) is a heavy-duty vehicle component with one pulley. 3G Electric interprets customer demand and delivers this genuine DAYCO tensioner across 14 industrial departments — and we supply far more than is listed. Our specialist depth in combustion, pumps and controls (as an authorised distributor for brands like FBR, Interpump, Riello, Beckett, Schneider, ABB, Siemens, SKF, Festo, and Fluke) serves as a trust anchor, ensuring you get the right answer, not just a catalog.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the DAYCO 89439 belt tensioner used for?

The DAYCO 89439 self-adjusting belt tensioner maintains proper tension on engine accessory drive belts in heavy-duty vehicles. It automatically compensates for belt stretch and wear, reducing slippage and extending belt life. 3G Electric supplies this genuine DAYCO part to support fleet maintenance and industrial equipment uptime.

What are the specifications of the DAYCO 89439 belt tensioner?

The DAYCO 89439 is a heavy-duty self-adjusting belt tensioner with one pulley. Its manufacturer part number is 89439, and it is rated for heavy-duty performance. 3G Electric sources this genuine DAYCO component for customers across 14 industrial departments, including vehicle and equipment maintenance.

Where to buy the DAYCO 89439 belt tensioner worldwide?

3G Electric supplies the DAYCO 89439 self-adjusting belt tensioner to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us to order this genuine DAYCO part for your heavy-duty vehicle or industrial application.

How to install the DAYCO 89439 belt tensioner?

Install the DAYCO 89439 tensioner by first relieving belt tension, then removing the old unit. Align the new tensioner with the mounting bracket, torque bolts to manufacturer specifications, and route the belt over the pulley. Release the tensioner arm to apply proper belt tension. Always consult the vehicle service manual.

Used in

Common applications for DAYCO
Automotive service centers — DAYCO metal exhaust hoses (SKU 4GKA4, 4GKA5) for flexible exhaust extraction from vehicle tailpipes during repair.
Marine engine rooms — DAYCO 304 stainless steel exhaust hoses (SKU 4GKA8, 4GKA7) for venting diesel generator exhaust in confined spaces.
Fuel system maintenance — DAYCO SAE J30R7 fuel hoses (SKU 4GJW1) for replacement of low-pressure fuel lines in industrial engines.
High-temperature fuel injection — DAYCO FKM fuel injection hose (SKU 4GJW6) for return lines on common-rail diesel systems operating above 250°F.
Industrial ventilation — DAYCO metal exhaust kits (SKU 4GKC1) for connecting fume hoods to exhaust ducts in welding or chemical processing areas.
Biofuel handling — DAYCO SAE J1527 fuel hoses (SKU 4GJW3) for transfer of biodiesel blends in agricultural equipment refueling stations.

DAYCO Products

3G Electric supplies DAYCO vehicle self-adjusting belt tensioners. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from DAYCO

View all DAYCO parts
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89370, 1 Pulleys, 3 in Outside Dia. Key specifications — Manufacturer Part Number: 89370; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89370, 1 Pulleys, 3 in Outside Dia. Key specifications — Manufacturer Part Number: 89370; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89444, Heavy Duty, 1 Pulleys. Key specifications — Performance Rating: Heavy Duty; Manufacturer Part Number: 89444; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89444, Heavy Duty, 1 Pulleys. Key specifications — Performance Rating: Heavy Duty; Manufacturer Part Number: 89444; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89252, 1 Pulleys, 2 3/4 in Outside Dia. Key specifications — Manufacturer Part Number: 89252; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89252, 1 Pulleys, 2 3/4 in Outside Dia. Key specifications — Manufacturer Part Number: 89252; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89352, 0 Pulleys. Key specifications — Manufacturer Part Number: 89352; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89352, 0 Pulleys. Key specifications — Manufacturer Part Number: 89352; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89251, 1 Pulleys, 3 1/2 in Outside Dia. Key specifications — Manufacturer Part Number: 89251; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89251, 1 Pulleys, 3 1/2 in Outside Dia. Key specifications — Manufacturer Part Number: 89251; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89304, 1 Pulleys, 3 1/4 in Outside Dia. Key specifications — Manufacturer Part Number: 89304; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89304, 1 Pulleys, 3 1/4 in Outside Dia. Key specifications — Manufacturer Part Number: 89304; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89204, 1 Pulleys, 3 1/2 in Outside Dia. Key specifications — Manufacturer Part Number: 89204; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89204, 1 Pulleys, 3 1/2 in Outside Dia. Key specifications — Manufacturer Part Number: 89204; Brand: DAYCO.
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89446, Heavy Duty, 1 Pulleys. Key specifications — Performance Rating: Heavy Duty; Manufacturer Part Number: 89446; Brand: DAYCO.
DAYCO
DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89446, Heavy Duty, 1 Pulleys. Key specifications — Performance Rating: Heavy Duty; Manufacturer Part Number: 89446; Brand: DAYCO.