TM 10-3930-664-10 f. Remove the fastener from the park brake lockout located in the driveshaft retainer and remove the park brake lockout. CAUTION When  disconnecting  the  front  driveshaft,  care  must  be  taken  to  ensure   that   tube   and   yoke   do   not separate. g. Remove  the  bolts  attaching  the  front  driveshaft  to  the  front  axle  and  install  the  driveshaft  into  the  driveshaft retainer using the fastener taken from the park brake lockout. h. Rotate the steering bypass valve handle one-quarter turn to the open position.  In open position, valve handle aligns with the valve. i. Place the driveshaft fasteners in the tool box 2-51