LiuGong CLG835H, Service Manual

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January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system
2. Bucket dump
When the control level is shifted to the tilting back position, the pilot pressure oil from the pilot valve acts
on the pilot oil port at b1 end of the bucket tilting union, the bucket tilting union valve rod 6, which works
in right position, moves leftwards, the pressure oil from P port returns to the bucket tilting union reversing
valve rod via the orifice of bucket tilting union valve rod 6 and the pressure compensation valve 7, after
reversing, the pressure oil enters into big cavity of the bucket tilting cylinder, meanwhile, LS oil line from
the pressure compensation valve 7 acts (via shuttle valve) on flow control valve of variable pump and
controls the displacement of the pump. Oil from small cavity of bucket tilting cylinder is connected with oil
return port T of the control valve via bucket tilting union valve rod 6, bucket tilting cylinder piston rod
extends to realize the bucket tilt back.
P18H00021