HVAC & Equipment V-Belt A66/4L680, Replaces Gates 6868

The A66 V-belt is designed to transfer motor power to compatible driven sheaves. Match the original belt by section, width and length before ordering.

Cross-Reference Information

Important: Gates PoweRated and Timken 4L numbers are dimensional FHP alternatives. Dayco AX is a cogged performance alternative. Construction and duty rating can differ from a wrapped classical A-section belt, so verify the equipment requirements before substituting.

Is This the Right Belt?

Confirm the complete marking on the old belt. Similar belts may share an outside length while using a different section, depth, effective length or construction.

Common Symptoms

• Belt slips under load
• Squealing, chirping or belt dust
• Fan, blower, pump or driven component turns slowly
• Belt is cracked, glazed, stretched or frayed

Check Before Replacing

• Confirm A-section profile and 1/2-inch top width
• Confirm the required 68-inch outside length
• Inspect pulleys and sheaves for wear, rust or debris
• Check alignment, bearing condition and belt tension

Part Details

Installation Notes

1. Disconnect and lock out electrical power.
2. Relieve belt tension according to the equipment service manual.
3. Inspect and clean the pulleys before fitting the replacement belt.
4. Align the pulleys and set tension to the equipment manufacturer's specification.
5. Rotate the drive by hand, reinstall guards, restore power and test operation.

Verified Compatible Equipment Models

No manufacturer-published model-level fitment was verified for this universal belt size. Official sources list broad applications including HVAC fans and blowers, pumps, outdoor power equipment, appliances and general industrial drives. Match by belt designation, section and length—not equipment type alone.

Fitment reminder: Exact cross-reference: A66, 4L680. Verified crossover search terms: A66, 4L680, Gates 6868, Gates 4L680K, Timken 4L680.