HYDRAULICS 1.29 Steering selector valve (22) The steering selector valve is solenoid operated and diverts oil to the respective ports of the steering cylinders. Three modes of steering are available by selecting the steering mode switch in the cab to give either two-wheel steering (front wheels), four-wheel steering or ‘crab’ steering. The machine must always be stationary before changing steering modes. C1 To rear steering cylinder (19) C2 To rear steering cylinder (19) C4 To front steering cylinder (15) T Return to hydraulic tank (1) P From inlet section (36) CF - Line C3 To front steering cylinder (15) O OSPF250 valve A Adapter E Selector valve LS From inlet section (36) LS – Line