TM 10-3930-664-10 CAUTION If the cap screw which attaches the parking brake cylinder rod  to  the  parking  brake  cylinder  mount  was removed to release the parking brake for towing of the 4KRTFL, the cap screw must be reinstalled prior to using the following procedures. (1)   Start engine and release the parking brake by placing PARK BRAKE switch to OFF. (2)   Remove park brake lockout from park brake cylinder. NOTE Park brake is automatically applied when engine stops unless park brake lockout is installed. (3)   Place PARK BRAKE switch to ON, then stop engine. CAUTION Lowering or raising the tow bar requires two people.  Tow bar weighs 120 pounds (54 kg) which exceeds the weight one person may safely handle. (4)   Detach  tow  bar  from  towing  vehicle  and  raise  tow  bar  until  tow  bar  arms  seat  inside  the  tow  bar  latch mounts. (5)   Rotate the tow bar latch pins to align the retaining pins with the keyways in the latch mounts and insert the pins completely through the latch mounts.  Secure the latch pins by rotating them so that the retaining pins no longer align with the keyways. (6)   Remove the safety chains from the towing vehicle and stow on the 4KRTFL. (7)   Remove the driveshaft fasteners from the tool box. CAUTION Rear  axle  must  be  disengaged  from  the  transmission  prior  to  attaching  the  front  driveshaft  to  the  front axle.  Ensure the REAR AXLE DISCONNECT handle is pushed downward. (8) Remove the fastener attaching the driveshaft to the driveshaft retainer and position the driveshaft for attachment to the front axle. 2-53