lx188LX172, LX173, LX176, LX178, LX186 & LX188 Lawn Tractors TECHNICAL MANUAL John Deere Lawn & Grounds Care Division TM1492 (31MAY96) Litho in U.S.A 2.The John Deere LX188 drive belt diagram consists of several parts, including the drive pulleys, idler pulleys, and tensioner pulley. These pulleys work in conjunction with the drive belt to transmit power from the engine’s crankshaft