Lawn Torsion Spring Compatible With Troy-Bilt XT1 LT42 LT46 LX42KH TB42 TB46 Tractor Part. Also fits for Husky, Murray, Yard Man Replaces OEM 732-05151A, 732-05151 The Lawn Torsion Spring is designed to be compatible with Troy-Bilt XT1 LT42, LT46, LX42KH, TB42, and TB46 tractor models. It is also compatible with Husky, Murray, and Yard Man lawn tractors. This spring serves as a replacement for OEM numbers 732-05151A and 732-05151.