40
              
            
            
              16.
            
            
              
                 Wheels Drives:
              
            
            
              TheExtractor is designedwith a fowdivider
            
            
              that splits the fow of pressurized oil to the
            
            
              rollers and the wheel motors for moving
            
            
              the machine into the bag.  Use the pres-
            
            
              sure relief valve to the wheel drive circuit
            
            
              to increase the circuit pressure to provide
            
            
              more power to drive the wheels.  Use this
            
            
              feature if the bag is starting to tear and is not
            
            
              able to carry the load to move the Extractor
            
            
              into the grain. Watch the pressure gauge to
            
            
              monitor system pressure and keep it below
            
            
              2000 psi.
            
            
              
                Fig.  37   WHEEL DRIVES
              
            
            
              
                Relief Valve/Gauge
              
            
            
              
                Wheel Motor
              
            
            
              
                Schematic