John Deere Replacement PTO Clutch AM122969 for models LX172, LX173, LX176, LX178, LX186, LX188, STX30 and STX38. OEM Part Numbers: AM122969 / AM100979 / AM115090 / AM118969 Replaces OEM Part Number(s): LX172 LX173 LX176 LX178 LX186 LX186 G15 Lawn Tractors HD45 HD75 Hydrostatic Tractors Subs For AM115090 or AM118969