Bestorq 840593100868 A36 4L380 V-belt

Product Description

The BESTORQ 840593100868 is an A-section V-belt, also designated 4L380, used in fractional and integral horsepower drive applications across HVAC, refrigeration, and light industrial equipment. The A-section profile is one of the most common wrapped V-belt standards, fitting standard A-groove sheaves and pulleys. This belt is a direct drop-in for systems requiring an A36 or 4L380 belt, and is installed by HVAC technicians, mechanical contractors, and facilities maintenance personnel on air handling units, fan drives, compressor drives, and similar rotating equipment.

The A36 designation indicates an A-section belt with an effective outside circumference of approximately 38 inches and a top width consistent with the A-section standard. The 4L380 cross-reference reflects the fractional horsepower belt numbering system where the final three digits represent a 38.0-inch outside circumference. This belt is suited for commercial buildings, schools, hospitals, and transportation facilities where belt-driven HVAC and ventilation equipment is commonplace. It is a standard stocked replacement belt for preventive maintenance and emergency service calls.

Key Features

• A-section V-belt profile fits standard A-groove sheaves and pulleys
• Dual designation: A36 and 4L380 for cross-reference sourcing
• Suitable for HVAC fan drives, blower drives, and light industrial rotating equipment
• Applicable in commercial, institutional, and transportation facility maintenance programs
• Standard wrapped construction for general-purpose drive applications

Compatibility

Designed as an OEM-style replacement for any drive system specifying an A36 or 4L380 A-section V-belt. Fits standard A-groove variable-pitch and fixed sheaves used in residential and commercial HVAC, ventilation, and light-duty mechanical drive applications.

Installation Notes

A licensed HVAC technician or qualified mechanical contractor should de-energize and lock out the equipment before replacing drive belts. Loosen the motor mount or tensioning hardware to relieve tension before removing the old belt, then seat the new belt fully in the sheave grooves before re-tensioning to manufacturer specifications. Do not use tools to force the belt over sheave flanges, as this can damage the belt cords. Follow OSHA lockout/tagout procedures and reinstall all belt guards before returning equipment to service.

Technical Specifications

• Belt Designation: A36
• Cross-Reference Designation: 4L380
• Belt Section: A-section

Standard Information

• Brand: BESTORQ
• Manufacturer Part Number: 840593100868