With advantages of on-load startup,overload protection,torsional vibration isolation,impact mitigation,stepless speed regulation YOTFJ450/560/650/750/875 speed-adjustable hydraulic coupling reverse-gear reducerProduct usage: used together with 140, 190, 260, 320 and other series diesel engines manufactured by us and Caterpillar, Volvo and Cummins diesel engines or electric motors for driving mud ...