Gates 4L390K PoweRated V-Belt

The Gates 4L390K is a 39.0-inch outside-length aramid-reinforced V-belt from the Gates PoweRated line, engineered for outdoor power equipment with shock loading: lawn tractors, riding mowers, snow blowers, tillers, and similar lawn-and-garden machinery. The Kevlar tensile cord handles the start-stop torque cycles that destroy standard fractional-horsepower V-belts.

Specifications

Applications

The Gates 4L390K is designed for outdoor power equipment where shock loading and start-stop cycles are common:

• Riding lawn mowers and lawn tractors
• Walk-behind mowers
• Snow blowers and snow throwers
• Garden tillers and cultivators
• Wood chippers and shredders
• Power washers (engine-driven)
• Generators and small portable equipment

For continuous industrial duty applications, see the standard V-belt catalog or call us at (888) 203-2358 for sizing assistance.

Frequently Asked Questions

What is the Gates 4L390K used for?

The Gates 4L390K is a 39.0-inch outside-length V-belt used in outdoor power equipment including lawn tractors, riding mowers, snow blowers, and tillers. The Kevlar tensile cord makes it suitable for shock-load applications where standard fractional-horsepower belts fail prematurely.

What does the K in Gates 4L390K mean?

The K suffix in Gates PoweRated nomenclature indicates aramid (Kevlar) tensile cord construction. A Gates 4L390 without the K has polyester cord rated for standard duty. The 4L390K is the heavy-duty version of the same belt length.

What are the dimensions of the Gates 4L390K?

The Gates 4L390K measures 39.0 inches outside length, 1/2 inch top width, 5/16 inch thick, with a 40-degree angle. The 4L section is an ANSI/RMA fractional horsepower standard, so dimensions match any other manufacturer's 4L-section belt.

How do I measure my old V-belt to confirm the Gates 4L390K is the right replacement?

Measure the outside length of your old belt around the outside, not the pulley groove. If it measures approximately 39.0 inches and the belt is 1/2 inch wide at the top, the Gates 4L390K is a direct replacement. If the original belt has a part number stamped on it, cross-reference with the manufacturer's catalog before ordering.

Does the Gates 4L390K ship from Houston?

Yes. Texas Belting & Supply stocks Gates PoweRated V-belts at our Houston, Texas warehouse with same-day shipping on in-stock items ordered before 3 PM Central. Call (888) 203-2358 to confirm stock and get a freight quote.