The A77K / 4LK790 is a high performance Kevlar V belt designed for demanding applications requiring strength, heat resistance, and long service life. Built with aramid fiber cords and a wrapped cover, this belt maintains flexibility under load and resists wear from environmental exposure. It is commonly used in equipment such as lawn tractors, tillers, compressors, and other machinery that runs on a classical A section belt.
This belt is a direct replacement for OEM belts requiring a 1/2 inch top width and 79 inch outside length. The Kevlar reinforcement ensures minimal stretch and consistent power transmission over time, making it suitable for both residential and commercial machines.
Cross Reference
AYP / Roper / Sears   106085X, 532106085
Belt (Industry Number) Â Â 4L790
Bolens   173-9080
Gravely   044439, 26142, 44439, 07238600, 204438, 026142, 20443800
John Deere   89832, M47043, M84075, M89832
MTD Â Â 754-0339, 754-0349, 954-0339, 9540339A, 50400237
Murray   37X59
Simplicity / Allis Chalmers   106723, 1670832, 1679835, 177126, 2027350
