Jason Industrial 3L420 V-belt

Product Description

The JASON INDUSTRIAL 3L420 is a fractional horsepower V-belt designed for light-duty power transmission applications. This belt transfers rotational power between sheaves in motors, fans, and small machinery. The 3L cross-section designation identifies a standard fractional horsepower profile, and the 420 suffix indicates the belt's nominal outside circumference of 42.0 inches. HVAC technicians, equipment service pros, and maintenance trades use this belt as a direct replacement in systems where a 3L-series belt is specified.

The 3L420 is suited for residential and light commercial applications including belt-driven blower assemblies, small compressors, pumps, and other fractional horsepower equipment. It fits standard 3L-groove sheaves and pulleys. This belt is a common replacement part in fan coil units, air handlers, and small mechanical equipment where precise belt sizing is required for proper tension and drive efficiency.

Key Features

• 3L fractional horsepower cross-section profile for light-duty power transmission
• 42.0-inch nominal outside circumference for accurate sizing and tensioning
• Designed for use with standard 3L-groove sheaves and pulleys
• Direct OEM-style replacement for equipment specifying a 3L420 belt

Compatibility

Designed as an OEM-style replacement for equipment requiring a standard 3L-series fractional horsepower V-belt with a nominal outside circumference of 42.0 inches.

Installation Notes

V-belt replacement should be performed by a qualified technician with power fully disconnected and locked out at the disconnect before beginning work. Inspect sheaves and pulleys for wear or misalignment before installing the new belt. Proper belt tension is critical — over-tensioning accelerates bearing wear, while under-tensioning causes slippage and heat buildup. Follow the equipment manufacturer's tensioning specification when available.

Technical Specifications

• Belt Section: 3L (Fractional Horsepower)
• Nominal Outside Circumference: 42.0 inches
• UPC: 74604100032

Standard Information

• Brand: JASON INDUSTRIAL
• Manufacturer Part Number: 3L420