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Structure Function Principle
January 24, 2017
Work hydraulic system
CLG835H
5. Boom lowering
When the control level is shifted to the descending position, the pilot pressure oil from the pilot valve acts
on the pilot oil port at a2 end of the boom union, the boom union valve rod 8, which works in left position
(descending position), moves rightwards, the pressure oil from P port returns to the boom union revers-
ing valve rod via the orifice of boom union valve rod 8 and the pressure compensation valve 7, after
reversing, the pressure oil enters into small cavity of the boom cylinder, meanwhile, LS oil line from the
pressure compensation valve 7 acts (via shuttle valve) on flow control valve of variable pump and con-
trols the displacement of the pump. Oil from big cavity of boom cylinder is connected with oil return port
T of the control valve via boom union valve rod 8 and back pressure valve 4, boom cylinder piston rod
retracts to realize the descending of the boom.
P18H00023
Summary of Contents for CLG835H
Page 2: ......
Page 4: ...Contents January 24 2017 CLG835H...
Page 6: ...1 2 General Information January 24 2017 CLG835H...
Page 38: ...1 34 Machine Inspection Table January 24 2017 CLG835H...
Page 156: ...3 2 Power Train System January 24 2017 CLG835H...
Page 214: ...3 2 Power Train System January 24 2017 CLG835H...
Page 272: ...3 60 Testing and adjustment January 24 2017 Power Train Test CLG835H...
Page 276: ...4 4 Hydraulic System January 24 2017 CLG835H...
Page 552: ...6 2 Driver s Cab System January 24 2017 CLG835H...
Page 608: ...7 2 Structure January 24 2017 CLG835H...
Page 662: ...8 4 Electrical System January 24 2017 CLG835H...
Page 677: ...8 19 January 24 2017 Structure Function Principle CLG835H Power System P18E00014...