... 1,front loader,back digger 2,buffer valve hydraulic system 3,Engine type/power(KW):Weichai 4100/44kw(60HP) front ... loader,back digger ,backhoe loader 4x4small type backhoe loader buffer valve hydraulic system, ensure reliable, efficient, stable job. ... even installed reversing valves, moving arm rotary control assembly buffer valve hydraulic system, ensure reliable, efficient, stable job. Cab ...