农机底盘结构与维修农机底盘结构与维修350101液压.ppt

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2021-04-13 发布于北京
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农机底盘结构与维修农机底盘结构与维修350101液压.ppt

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* / 4 Shuttle Command ShuttleCommand Low Pressure circuit Steering - Fed by priority valve from pump PTO FWD Differential lock (Front and rear) Lubrication OC High pressure hydraulic system operation Intake filter ( 1 ) High pressure circuit gear pump ( 2 ) Pressure relief valve ( 3 ) Trailer brake valve ( 4 ) Open centre remote control valves ( 5 ) Lift control valve ( 6 ) Lift cylinder safety valve ( 7 ) Mechanical hydraulic lift assembly ( 8 ) Steering and low pressure circuit gear pump ( 9 ) Steering motor ( 10 ) Low pressure circuit pressure regulating valve ( 11 ) Layout of OC (Mechanical) system pipe work Open centre remote control valves ( 1 ) Lift cover control valve ( 2 ) Supply from remotes to lift cover control valve ( 3 ), Supply to steering motor ( 4 ) Steering motor return to low pressure circuit ( 5 ), Steering, low pressure and lubrication circuit gear pump ( 6 ) High pressure circuit gear pump ( 7 ) Supply to hydraulic lift and assist ram ( where fitted ) ( 8 ). All systems fitted in series Priority = Trailer brakes - remote valves - hydraulic lift Pump is continually pumping oil which is returned into the rear axle ( if not required by a hydraulic service ) through the control valve spool.