TM 10-3930-671-10 Know The Truck Truck Components & Features Power Steering System The  forklift  is  equipped  with  hydrostatic  power  steering.    Oil  is  supplied  from  main  hydraulic  pump  through  a  priority- demand valve to steer gear.  Priority demand valve gives correct oil flow for steering.  Oil not used is added to lift or tilt system.  Steering hand wheel operates a steering control valve which directs oil flow  to  a  2-way  steering  cylinder  in  the steer axle.  The steering control valve will act as a pump to provide manual steering if main pump oil flow stops. TA-18 directional control lever actuates electrical circuits that engage the "Forward" or "Reverse" clutch pack. Accelerator Control Pedal Travel speed and lift (pump) speed are controlled by engine speed. Engine speed is controlled with a foot pedal suspended from the cowl and linked to engine fuel system. E-42