JMY450 hydraulic diesel locomotive can be applied for standard track gauge or for short distance operation,it also can supply traction power for other usage.14 locomotives of this type have been ordered by Hong Kong Kowloon-Canton Railway corporation(KCRC),and continually taken into  KCRC site for normal service.The locomotive is provided with Caterpillar diesel engine with low fuel consumption and electrical fuel ejecting system and the emission of which can comply to EUR II standard,hydraulic reversing,electri-cal automatic gear shift,low speed control,and faults protecting device.The locomotives can be multiple unite operated,and kept with low noise and pollution which comply tob the environmental protection speci-fication of Hong Kong Government.The Program Logic Controller(PLC) has been applied in electrical system,and the international advanced safety running automatic protecting system(ATC) has been applied in the locomotive.This type of locomotive is kept with good pertformance,easily operating,high reliability,small voiume and long life.